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The upfront cost of solar is one of the most common reasons UK homeowners put off going green. So when a letter arrives from your local council inviting you to join a group-buying scheme, the appeal is obvious. Solar Together has been operating in the UK since 2012 and is now available through dozens of councils, offering bulk-discount pricing through a process called a reverse auction. The headline figures, often 20 to 30 per cent below average market rates, sound compelling. But do those savings genuinely stack up once you examine at equipment quality, installer choice, lead times and aftercare? This guide breaks down exactly how the scheme works so you can make a confident, informed decision.
Solar Together is a council-backed group-buying initiative delivered by the Dutch company iChoosr. The model is straightforward: a local authority promotes the scheme to its residents, while iChoosr manages the registration process, vets installers and runs the auction that determines pricing.
It is important to be clear about what the scheme is not. Solar Together is not a government grant, and it does not provide free solar panels. Homeowners who take part still pay for their installation in full; they simply benefit from a bulk-negotiated price. The scheme has grown steadily since its launch, with thousands of UK homes now installed through it and new council areas joining each year across England and Wales.
Eligibility is broadly straightforward: the scheme is open to homeowners or, in some cases, leaseholders with landlord permission. Certain council rounds also include small businesses and Commonhold Associations.
The process follows five typical stages, and understanding each one helps set realistic expectations.
One important caveat on timing: from initial registration through to the moment your system is switched on, the full journey can take around nine months in many regions. In some cases, homeowners have reported waiting longer than twelve months. If you need panels installed by a specific date, this lead time is worth factoring in from the outset.
Solar Together and the Greater London Authority cite typical savings of 20 to 30 per cent off average market rates, with some councils reporting figures of 35 to 40 per cent in their published round reports. Those headline numbers are attractive, but they come with caveats worth unpacking.
The comparison point is an unspecified national average rather than prices from local, directly contracted installers. In practice, if you gather three quotes from MCS-certified installers in your county, you may find that at least one comes close to, or even matches, the Solar Together price. To give a rough sense of scale: a typical 4 kW system in the South East might be quoted at somewhere between £6,000 and £8,000 through a direct installer, depending on equipment choice, while a Solar Together offer for a comparable system might land towards the lower end of that range or slightly below it. That is a difference, but not always as dramatic as the headline percentage implies.
It is also worth noting that 0% VAT on domestic solar panels applies to all UK installations regardless of how you procure them, so this is not an exclusive advantage of the scheme. Where pricing differences between group-buying and independent quotes tend to be most significant is on battery storage. This typically adds several thousand pounds to the total and is where installer margins vary most.
Group-buying schemes have a good track record, but they also come with limitations that are less frequently highlighted in council promotional material.
The most practical advice for any homeowner considering Solar Together is to treat it as one quote among several. Even if the process takes a few more hours, gathering at least two quotes from MCS-certified local installers gives you a genuine comparison.
When comparing, look beyond the headline price and examine:
It is also worth asking each installer for examples of nearby installs, ideally with homeowners willing to provide a reference, and checking their reviews on independent platforms such as Trustpilot or Which? Trusted Traders.
Solar Together runs in defined geographic rounds linked to participating councils. Not every council area is part of the scheme, and those that are tend to open registration windows for limited periods before each auction round. Missing the registration window can mean waiting for the next one, which could be six to twelve months away.
To find out if a round is active near you, check your local council’s website or visit the official Solar Together site. Several South East councils, including areas within Kent, Sussex and Surrey, have run rounds in recent years. Some councils now also run alternative or complementary group-buying pilots, sometimes under different names, so it is worth checking your council’s energy or sustainability pages for the latest information.
Solar Together works well for some homeowners and less well for others. Being honest about which group you fall into can save a lot of frustration.
Group-buying is likely a good fit if you:
Group-buying is probably a poor fit if you:
No. Solar Together is a council-promoted group-buying initiative, not a government grant. Homeowners who accept an offer pay for the full cost of their installation. The benefit is a bulk-negotiated discount through a competitive auction, not subsidised or free panels. Separate government support mechanisms, such as the Smart Export Guarantee, remain available to all eligible installations regardless of how they are procured.
Published figures from iChoosr and participating councils typically cite 20 to 30 per cent below average market rates, with some rounds reporting higher. However, the comparison is against a national average rather than local quotes. In practice, getting two or three quotes from MCS-certified installers in your county may produce prices close to the group-buying figure, particularly if the local market is competitive. The savings are real but not guaranteed to be dramatic in every case.
Generally, no. Once an installer wins the regional auction, they specify the equipment package for all accepted households. You can accept or decline the offer, but you cannot negotiate the panel brand, inverter model or battery chemistry within the scheme. If equipment specification matters to you, an independent quote lets you compare specific products and warranties side by side.
This is a genuine risk with any single-contractor model. iChoosr does pre-vet installers, and some council agreements include provisions for alternative arrangements, but the level of protection varies by round. As a homeowner, it is worth asking iChoosr directly what consumer protections are in place before accepting an offer, and whether the installer holds appropriate insurance for part-completed works.
Yes. The Smart Export Guarantee is available to any eligible solar PV system installed by an MCS-certified installer, regardless of how you sourced the installation. Solar Together’s pre-vetted installers hold MCS certification, so a system installed through the scheme should qualify. Once your system is live, you apply directly to an energy supplier who offers a SEG tariff to begin receiving payments for the electricity you export to the grid.
Solar Together can be a useful route for UK homeowners who want a bulk-negotiated price without the effort of sourcing multiple quotes. The savings are real. The process is straightforward, and local council endorsement adds a layer of reassurance. The scheme is not automatically the cheapest or the best option for every household. Equipment specifications, installer choice and installation timelines are all constrained by the auction model in ways that matter more to some homeowners than others.
The smartest approach is to use a Solar Together offer as one data point alongside two or three independent quotes from MCS-certified local installers. Compare on specification, not just price, and factor in how long you are prepared to wait.
If you are based in the South East and would like a free, no-obligation quote to set alongside any group-buying offer, The Solar Co would be happy to help. We offer full transparency on panel and inverter brands, lead times and aftercare, so you can weigh a bespoke proposal against the group-buying route with confidence.
One piece of good news that immediately changes the maths, if you are considering installing solar panels, is that solar panels in the UK are currently zero-rated for VAT. The relief is applied automatically by your installer and not reclaimed later.
The policy is a deliberate part of the government’s push to support household decarbonisation and bring down energy bills, and it covers far more than just the panels themselves. By the time you reach the end of this article, you will know exactly how much you can save, what is covered, who qualifies, how the relief is applied at the quote stage, and what happens when the policy ends in March 2027.
Since 1 April 2022, the UK government has zero-rated VAT on solar panels and other energy-saving materials installed in residential properties. Before that date, solar installations were eligible for either the reduced 5% rate or, in some cases, the full 20% rate.
In practical terms, zero-rated means the homeowner pays no VAT at all on qualifying products and on the installer’s labour, rather than the standard 20% that applies to most goods and services. It is not a rebate that you claim back after the work; it simply does not appear on your final invoice in the first place. It is applied at the point of invoice by an MCS-accredited installer, who is responsible for ensuring the work meets the eligibility criteria set out by HMRC.
The policy was introduced to accelerate household decarbonisation and reduce energy bills. It sits alongside other measures such as the Smart Export Guarantee and the ECO4 scheme, and forms a coherent set of incentives to make low-carbon home upgrades more affordable.
Importantly, the relief is automatic. There is no separate paperwork for the homeowner to complete, no form to send to HMRC, and no waiting period.
Ultimately, this will save you a substantial sum. A typical 4kW residential solar PV system costs around £6,000 to £8,000 installed, and at the previous 20% VAT rate, that would have added between £1,200 and £1,600 to the bill. Under the current zero rate, that money stays in your pocket. For a larger 6kW system priced around £10,000, the savings rise to roughly £2,000. For homeowners installing solar alongside battery storage, where a complete package typically runs between £10,000 and £14,000, the VAT relief is worth £2,000 to £2,800 on the total project. This is even before you think about energy savings or export income.
Because the relief is built into your installer’s quote, the discount is visible as soon as you receive a proposal. You see the lower total, not a higher headline price, followed by a VAT line that you have to wait to recover. That clarity makes it much easier to compare quotes and to budget accurately.
It is also worth remembering that 0% VAT does not exist in isolation. The savings are compounded by the Smart Export Guarantee, which pays you for surplus electricity exported to the grid, and with the energy you no longer have to import from your supplier. Together, these factors meaningfully shorten the payback period on a solar investment and improve the long-term financial return.
The relief covers far more than just the panels. Qualifying items include:
Standalone batteries, fitted without any new solar panels, have also qualified for 0% VAT since February 2024. That extension was a recognition that battery storage plays an essential role in flexible tariffs and grid balancing, even for homes that may add solar later.
Ancillary works that are directly required for the installation, such as scaffolding, minor electrical upgrades, and any necessary cable runs, also fall under the relief when supplied by the installer as part of the same job.
The 0% rate applies to residential properties across Great Britain – England, Scotland, and Wales. That covers a broad range of homes, including:
There is no means testing, no income cap, and no property value limit. Every GB homeowner with a qualifying residential property is eligible, regardless of their earnings or their home’s value. That makes this relief unusually accessible compared with grant schemes that are targeted at specific income brackets.
Landlords and housing associations installing solar on residential rental properties also qualify, making 0% VAT a useful tool for portfolio landlords looking to upgrade their EPC ratings and lower running costs for tenants. Certain charitable buildings used for non-business purposes are also eligible.
Commercial properties and mixed-use buildings used primarily for business do not qualify and remain subject to standard VAT rates. If you run a business from home and the property is primarily residential, the install will usually still qualify, but it is worth flagging the use to your installer so they can confirm the treatment.
In most cases, getting the relief is as simple as choosing a reputable installer. There are, however, a few practical steps that protect you from common pitfalls.
Always use an MCS-certified installer. MCS certification is the standard recognised by HMRC and confirms that the installer can apply the zero rate with confidence. It is also a requirement if you want to register for the Smart Export Guarantee with your energy supplier.
Before signing any contract, check that the written quote clearly shows 0% VAT on both materials and labour. A properly presented quote will normally have a line showing the net cost, a line showing VAT at 0%, and a total. If VAT is missing entirely from the breakdown, ask for a revised quote that shows it explicitly so you have a clear paper trail.
Under the rules, labour must not exceed more than 40% of the package.If you want reassurance, ask your installer to confirm in writing that the installation qualifies as the HMRC zero-rated energy-saving materials category. Any professional installer will be happy to do this. Finally, query any quote that includes VAT at 5% or 20%, as this may indicate either an installer error or a non-qualifying setup that you should understand before proceeding.
The current zero rate will expire on 31 March 2027. That gives homeowners a clear window in which to act, but it is not open-ended.
From 1 April 2027, the VAT rate is set to revert to 5%, the reduced rate that applied to energy-saving materials before April 2022. It does not, under current legislation, snap back to the full 20% rate.
For example, on a £10,000 install, the move from 0% to 5% adds £500 to your final bill. On a £14,000 solar-plus-battery package, the same change adds £700. Installing before the deadline locks in greater savings and removes the risk of price changes around the transition.
There is currently no indication the relief will be extended beyond March 2027. Tax policy is subject to political decisions, and any change would need to be enacted by legislation in advance. The safer assumption is that the deadline will stand, and to plan accordingly.
For homeowners in the South East of England in particular, where installer demand is high and survey lead times can stretch during peak season, we recommend booking your installation well before the 2027 deadline. That gives you time to receive a proper survey, secure a confirmed installation slot, and lock in the full 0% VAT saving rather than scrambling at the last minute.
The 0% VAT relief shortens that period because the initial outlay is lower, which means the same annual savings clear the cost faster.
As a rough rule, the VAT saving brings the break-even point forward for a typical residential installation by approximately one to two years, depending on your usage profile and tariff. That is a meaningful improvement on what is already one of the more attractive home upgrades available.
One example could be a £6,500 4kW system. This saves the homeowner around £900 a year on electricity bills and now pays back in roughly seven years instead of the eight it would have taken with 20% VAT applied. Beyond the payback point, every year of generation is effectively free electricity for the panels’ remaining 20-plus-year life.
Combining 0% VAT with Smart Export Guarantee payments and the steady rise in retail electricity prices significantly improves the long-term return on solar. The arithmetic gets stronger, not weaker, the longer the system is in place.
Batteries also benefit. With storage in place, you can shift your import to the cheapest overnight slots on a time-of-use tariff and rely on stored energy during peak-rate hours, further deepening your savings. The VAT relief makes battery storage more financially viable, particularly for homes with high evening consumption.
One practical suggestion: rather than using the VAT saving to simply reduce your total spend, consider using it to upgrade. Stepping up to a higher-spec panel, a bigger inverter that allows future expansion, or adding battery storage to the project often delivers a better long-term return than pocketing the difference.
The VAT relief is the most universally accessible incentive, but it is not the only one. Other available schemes can considerably improve the financial case.
The Smart Export Guarantee (SEG) is the most important addition. SEG requires energy suppliers to pay you for surplus electricity exported to the grid. Tariffs vary by supplier between 4p and 15p per kWh. Combined with your import savings, it recovers a meaningful share of annual generation as either avoided cost or paid export.
ECO4 grants can fund part or all of a solar installation for low-income or vulnerable households, and the VAT saving applies in addition to the grant. The Home Upgrade Grant and any active local authority schemes operating in the South East of England can also further reduce the upfront outlay, particularly for properties off the gas grid.
Group-buying schemes such as Solar Together, run by some councils in partnership with vetted installers, benefit from 0% VAT, and the bulk-purchasing discount the scheme negotiates. For homeowners who are comfortable with a fixed specification chosen by the scheme, this compounds the cost savings.
Ask your installer to map all available incentives onto your quote. A good installer will set out which incentives apply to you, what they are worth, and what the net cost looks like once everything is taken into account. That way, you can see the full financial picture in one place rather than piecing it together yourself.
No. The relief is applied automatically by your installer at the quote and invoice stage. There is no separate application process or rebate form for homeowners to complete. Provided the installation qualifies under HMRC rules, the VAT rate is simply shown as 0% on the final invoice.
Usually not. The relief works most cleanly when the same company supplies and installs the system. If you buy panels separately, you are likely to pay standard-rate VAT on the products, which can wipe out any apparent savings from sourcing hardware independently.
Yes. Since February 2024, standalone residential battery storage systems have been eligible for 0% VAT even when installed without new solar panels. This allows homeowners to benefit from time-of-use tariffs and energy storage without paying VAT on the installation.
Under current legislation, yes. The zero rate is scheduled to end on 31 March 2027, after which VAT is expected to return to the previous reduced rate of 5%. There is currently no indication that the relief will be extended.
In many cases, yes. The relief generally applies to residential properties, including second homes. Holiday lets can be more complex depending on how the property is used commercially, so it is best to confirm eligibility with your installer before proceeding.
The 0% VAT rate is one of the most valuable solar incentives available to UK homeowners right now. It is automatic, universally accessible, and worth between £1,000 and £2,000 on a typical residential install, with even larger savings on solar-plus-battery packages. It covers all components, scaffolding and labour, and it is in addition to the Smart Export Guarantee, ECO4 grants, and group-buying schemes.
The catch, if you can call it that, is the clock. The zero rate only applies until 31 March 2027, after which it rises to 5%. Acting before the deadline secures the maximum savings, shortens your payback period, and removes any uncertainty about future policy changes.
If you are a homeowner in the South East of England weighing up solar panels or battery storage, the most useful next step is a proper site survey. The Solar Co’s MCS-accredited team will walk you through your roof’s suitability, the right system size for your usage, and a fully itemised quote showing exactly how much the 0% VAT relief saves on your specific project. There is no obligation and no pressure, just clear numbers tailored to your home.
Most solar homeowners focus on reducing their energy bills, and rightly so. But fewer realise there is another financial benefit quietly available in the background: getting paid for the surplus electricity you generate but do not use. The Smart Export Guarantee (SEG)is the government-backed scheme that makes this possible. This guide covers everything you need to know about the SEG tariff in the UK:
Whether you already have panels installed or are still weighing up the decision, the SEG is part of the financial case for going solar.
The Smart Export Guarantee is a government-mandated scheme that requires licensed electricity suppliers with 150,000 or more domestic customers to offer a tariff for surplus renewable electricity exported to the national grid. If your solar panels generate more electricity than your home uses, the excess flows back into the grid, and you get paid for it.
Introduced in January 2020, the SEG replaced the Feed-in Tariff (FiT), which closed to new applications in March 2019. The key distinction is that the FiT paid homeowners for every unit of electricity generated, whether consumed in the home or exported, whereas the SEG pays only for electricity not used. It is a smaller benefit on paper, but it remains a real income stream for solar households.
The scheme covers a range of renewable technologies:
…up to 5MW capacity. In practice, most domestic solar installations qualify on size alone. The SEG is administered by Ofgem, and uptake has grown steadily: over 270,000 UK households had registered by March 2025.
The mechanics of the SEG are straightforward once you understand the basic flow of electricity in a solar home:
That exported electricity is recorded in half-hour intervals by your smart meter (or a compatible dedicated export meter). The data is shared with your chosen SEG supplier, who uses it to calculate your payments. Payments are typically made quarterly and paid directly to your nominated bank account.
Your SEG supplier does not have to be the same company you buy your electricity from. Your import tariff and your export tariff are completely independent. This means you can shop around specifically for the best solar export tariff in the UK without affecting your existing energy deal.
Eligibility for the SEG comes down to four main requirements. Checking these before you start the registration process will make everything straightforward.
If your system was installed by a reputable, MCS-certified installer and you have a smart meter in place, you are almost certainly eligible. Registration is simply the remaining step.
It depends on your export rate and which supplier you choose. Unlike the old Feed-in Tariff, SEG rates are not set by the government. Each supplier determines its own rate, and they vary considerably.
As of May 2026, fixed rates across the market range from around 6.8p per kWh at the lower end (Scottish Power) to 24-25p per kWh from suppliers such as EDF and Good Energy. Time-of-use tariffs can go higher still: Octopus Flux, for instance, pays up to 29p per kWh for households with a compatible battery that exports during peak demand hours in the evening.
To put this in concrete terms: a typical solar home in the UK exports around 1,500 kWh per year. At 10p per kWh, that amounts to roughly £150 annually. At 25p per kWh, the same export volume earns £375. The difference between the best and worst available tariffs for a typical system is well over £150 per year, which makes comparing SEG tariffs a genuinely worthwhile exercise rather than a formality.
For most UK homeowners, SEG payments are tax-free, provided the system is used primarily for self-consumption rather than for commercial generation business. If your circumstances are unusual, HMRC guidance or a tax adviser can clarify the position.
All electricity suppliers with 150,000 or more domestic customers are legally required to offer an SEG tariff. That obligation does not mean their rates are competitive. Choosing the right tariff is about understanding the different types on offer and matching them to your household.
Fixed-rate tariffs offer a set number of pence per kWh regardless of when you export. They are simple, predictable, and suit the majority of homeowners who want to register once and not think about it again.
Time-of-use or variable tariffs pay different rates depending on when the export happens. These can be significantly more lucrative, particularly if your home includes a battery storage system that lets you store surplus solar energy during the day and export it during peak evening periods when rates are at their highest.
Ofgem publishes a regularly updated list of all SEG tariffs, and independent comparison sites also track current rates. You can switch SEG suppliers at any time with no penalty, so it is worth reviewing your tariff at least once a year, even after you have registered.
When comparing tariffs, look beyond the headline pence-per-kWh figure. Consider payment frequency, whether there is a minimum export threshold before payments begin, and whether any contract terms could limit your ability to switch later.
Registering for a solar panel export payment in the UK is a five-step process that typically takes under an hour once your paperwork is in order.
Step 1: Confirm eligibility. Check that your installation is MCS-certified, that a smart meter is installed and recording export readings, and that your system is under 5MW.
Step 2: Choose a supplier. Compare current tariffs using Ofgem’s published list or a comparison site. You are not limited to your existing electricity import supplier.
Step 3: Apply. Contact your chosen SEG supplier directly, online or by telephone. You will need to provide your MCS certificate and any additional documentation they request, which is typically minimal.
Step 4: Meter setup. Confirm with the supplier that your smart meter is correctly configured to record and report half-hourly export data. The supplier will advise if any changes are needed.
Step 5: Receive payments. Once registered, payments are made automatically and typically arrive quarterly, based on your meter’s export readings.
The Feed-in Tariff was introduced in 2010 and offered generous, government-guaranteed rates for 20 to 25 years. It paid homeowners for every unit of electricity their system generated, including electricity consumed in the home. At its peak, FiT generation tariffs exceeded 40p per kWh for early adopters.
When the FiT closed to new applications in March 2019, the Smart Export Guarantee replaced it for new solar installations. The core difference is that the SEG pays only for electricity actually exported to the grid, and rates are market-driven rather than government-set. That means they can change over time, and homeowners need to register actively and review their tariff periodically.
Homeowners who were registered on the Feed-in Tariff before closure continue to receive their legacy payments for the duration of their agreement. They are not eligible to register the same installation for the SEG as well. The two schemes are entirely separate.
The SEG is less generous on paper than the old FiT, but it is still a real benefit. When viewed alongside significantly reduced electricity bills, it strengthens the overall financial case for solar installation.
Getting the best out of the Smart Export Guarantee is about more than simply registering for a good tariff. A few practical habits can make a noticeable difference.
No. Your SEG supplier and your electricity import supplier are entirely independent of each other. You can register your solar export with any qualifying SEG supplier, regardless of who you currently buy electricity from. Many homeowners find it worthwhile to choose a specialist supplier that offers a higher export rate, rather than defaulting to their existing energy company.
If you were registered on the Feed-in Tariff before March 2019, your legacy payments continue for the duration of your agreement. You are not eligible to register the same installation for the Smart Export Guarantee as well. The two schemes run separately and cannot be combined on the same system.
Yes. A smart meter, or a compatible dedicated export meter that records half-hourly data, is a firm requirement for all SEG registrations. If your home does not yet have a smart meter, your energy supplier can arrange an installation at no charge. It is worth requesting one ahead of your intended registration, as lead times can vary.
For the vast majority of UK homeowners, SEG payments are tax-free because the system is used primarily for personal energy consumption rather than commercial electricity generation. If your system is unusually large or you have other relevant circumstances, it is worth checking the current HMRC guidance or speaking with a qualified tax adviser to be certain.
Yes. There is no lock-in period and no exit penalty for switching SEG suppliers. You are free to move to a better-paying tariff at any time, and the process is straightforward. Given how much rates vary across the market and how frequently they are updated, reviewing your tariff once or twice a year is a sensible practice.
The Smart Export Guarantee is a government-backed scheme that allows homeowners with solar to earn money from the electricity they generate but do not use. The key steps are simple:
From that point, payments arrive automatically.
For homeowners who do not yet have solar panels, the SEG adds another layer to the financial case for going solar. Combined with reduced electricity bills over the system’s lifetime, the additional export income contributes meaningfully to overall returns.
If you are considering solar for your home in the South East of England, The Solar Co offers free, no-obligation roof surveys and quotes tailored to your property. Get in touch today to find out how solar could work for your home and what you could realistically earn through the SEG.
With UK electricity prices remaining stubbornly high, the prospect of generating your own power at home has never been more appealing. The good news is that the savings are real and, for most South East England homeowners, substantial. A typical household installing solar panels can save between £300 and £700 per year on electricity bills, and that figure rises further when battery storage or Smart Export Guarantee income is included. This article covers everything you need to know: how self-consumption drives your savings, how a battery changes the equation, what the Smart Export Guarantee pays, and why your location in the South East puts you at a particular advantage. Every home is different, so we will also show you how to estimate your own scenario, and you can always request a personalised quote from The Solar Co for figures tailored to your property.
How Solar Panels Reduce Your Energy Bills
The core principle behind solar savings is self-consumption: every unit of electricity your panels generate and you use at home is one unit you no longer need to buy from the grid. At current UK rates of around 26p per kWh, that is a meaningful saving every time your kettle boils, your washing machine runs, or your dishwasher completes a cycle during daylight hours.
It is worth being clear that the majority of your solar savings are avoided spending rather than direct income. The more energy-intensive tasks you can shift to daytime hours, the greater the benefit, because you are replacing expensive grid electricity with free solar power. Households where someone is at home during the day typically see the highest self-consumption rates.
A typical 4kWp system installed in the South East generates around 3,400 to 3,800 kWh of electricity per year, which represents a significant proportion of the average household’s annual consumption. To put that in concrete terms: if a household uses 3,500 kWh per year and self-consumes 40% of its solar output, it saves roughly 1,400 kWh, worth approximately £364 at current electricity rates. That figure alone illustrates why solar panels have become one of the most popular home improvements across the region.
Average Annual Savings: What UK Homeowners Can Expect
The table below gives a useful starting point for the savings most South East homeowners can expect, though individual results will vary.
These are averages, and your individual result will depend on how much energy you use, when you use it, your current electricity tariff, and the specifics of your roof. The key takeaway is that solar panels deliver genuine, lasting bill reductions, not marginal gains, and that adding battery storage meaningfully amplifies those savings for most households.
Key Factors That Affect Your Savings
Understanding what drives solar savings helps you set realistic expectations and make the right decisions for your home. The main variables are:
Solar Panels With and Without a Battery: How the Savings Compare
This is the question most homeowners ask once they understand the basics, and the honest answer is that battery storage makes a significant difference for the majority of UK households.
Without a battery, any solar electricity your panels generate that you do not immediately use is exported to the grid. During peak generation hours in the middle of the day, many households are out at work, which means a large proportion of their solar output earns only a modest export payment rather than replacing expensive grid electricity. This limits the potential bill savings considerably.
With a battery, that surplus generation is stored and then used in the evening, precisely when UK families tend to consume the most electricity. The alignment of supply and demand is what makes battery storage so financially compelling. A 4.5kWp system saves approximately £554 per year without a battery, rising to around £943 per year with one, based on 2026 Sunsave data. That is an additional £389 per year in bill savings from the battery alone.
A home battery typically adds between £2,000 and £4,000 to the total system cost, which does extend the overall payback period. However, it also significantly increases lifetime savings, making it the right choice for many households, particularly those where both adults are at work during the day and evening energy use is high.
Earning From the Smart Export Guarantee (SEG)
On top of the bill savings from self-consumption, homeowners with a solar system can earn additional income by exporting surplus electricity to the grid through the Smart Export Guarantee (SEG). This is the government-backed scheme that replaced the old Feed-in Tariff and requires licensed energy suppliers to pay a competitive rate for every unit you export.
SEG rates vary between energy suppliers, ranging from around 3p to over 20p per kWh in 2025. Ofgem data shows the average export tariff paid in 2024 to 2025 was around 13p per kWh. The best rates are often offered to existing electricity customers of a given supplier, so it is worth shopping around when your system is commissioned.
On average, UK homeowners with a solar system can earn between £50 and £500 per year through SEG, depending on system size, how much they export, and which tariff they select. However, it is important to remember that every unit used at home (saving around 26p) is worth roughly twice as much as every unit exported (earning around 13p). Maximising self-consumption should always be the priority, with SEG income treated as a welcome bonus rather than the primary financial driver.
Does Location Matter? South East England vs. the Rest of the UK
Location matters more than many homeowners realise. The South East of England receives more annual sunlight hours than almost any other region of the UK, which translates directly into higher electricity generation and faster payback periods for solar systems installed here.
South East homeowners typically see payback periods of 6 to 7 years, compared with 8 to 9 years for comparable systems in northern England or Scotland. Over a 25-year system lifespan, the regional advantage can represent several thousand pounds in additional cumulative savings. A South East installation can generate over £200 more in annual value compared with an equivalent system installed further north.
The Solar Co specialises exclusively in the South East, which means every survey, design, and installation is optimised for the specific conditions of the region. Customers benefit directly from this local expertise alongside the inherent solar advantage their geography provides.
How to Maximise Your Solar Panel Savings
Generating solar electricity is only half the story. Getting the most financial benefit from your system comes down to how intelligently you use what you generate. Here are the most effective strategies:
Frequently Asked Questions
How much can solar panels save on my electricity bill each year in the UK?
A typical UK household with a 3 to 4kWp solar system can save between £300 and £500 per year on electricity bills through reduced grid consumption. Adding battery storage raises this to £500 to £700 or more. These figures are based on self-consumption savings at current electricity rates of around 26p per kWh. Your actual savings will depend on your system size, how much energy you use during daylight hours, and your electricity tariff.
Do I save more money if I add a solar battery?
Yes, significantly. A battery stores surplus daytime solar electricity for use in the evening, increasing the proportion of solar power consumed at home from around 30 to 50% without a battery to 60 to 80% with one. Based on Sunsave’s 2026 research, a 4.5kWp system with a 2.5kW battery saves around £943 per year, compared with approximately £554 without a battery. The battery typically adds £2,000 to £4,000 to the system cost, but the additional annual savings often justify the investment over the system’s lifetime.
How does the Smart Export Guarantee affect my total savings?
The Smart Export Guarantee (SEG) pays you for every unit of surplus solar electricity you export to the grid. Rates range from around 3p to over 20p per kWh depending on your supplier, with the Ofgem-reported average around 13p in 2024 to 2025. Most homeowners earn between £50 and £500 per year through SEG. This income adds to your bill savings but is worth less per unit than what you save by using electricity directly at home, so maximising self-consumption remains the higher-value priority.
Does the South East get enough sunshine to make solar panels worth it?
Absolutely. The South East of England receives more annual solar irradiance than almost anywhere else in the UK, making it one of the best regions in the country for solar panel performance. A typical 4kWp system here generates 3,400 to 3,800 kWh per year. Payback periods are typically 6 to 7 years, shorter than the UK average, and lifetime savings are correspondingly higher. Even on overcast days, modern solar panels continue to generate electricity, just at a reduced rate.
How long before solar panels pay for themselves?
For a South East homeowner, the typical payback period is 6 to 7 years for a solar-only system and 8 to 10 years when battery storage is included, reflecting the higher upfront cost. After payback, the system continues to generate free electricity for the remainder of its 25-year-plus lifespan. Choosing a reputable MCS-certified installer such as The Solar Co, keeping maintenance costs low, and optimising your tariff all help to shorten the payback period and maximise lifetime returns.
Conclusion
Solar panels offer UK homeowners a reliable, long-term route to lower electricity bills, and the South East is one of the best places in the country to benefit. A typical system can save between £300 and £700 or more per year on energy costs, with additional income of £50 to £500 per year available through the Smart Export Guarantee. Adding battery storage meaningfully increases those returns by aligning your solar generation with your household’s peak consumption period.
South East homeowners enjoy a genuine geographic advantage: more sunlight hours, higher annual generation, and shorter payback periods than most of the UK. Combined with falling system costs and rising electricity prices, the financial case for solar has never been stronger in this region.
Every home is different, and the figures quoted here are averages. The most reliable way to understand what solar could save you specifically is to speak with a specialist who can assess your roof, usage patterns, and current tariff. The Solar Co offers free, no-obligation surveys and personalised savings estimates for homeowners across the South East.
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Most homeowners planning a solar installation spend their time thinking about panel placement, system size, and return on investment. What often catches them by surprise is learning that connecting solar panels to the UK grid is not simply a matter of wiring them up and flipping a switch. Every solar installation must be formally registered with your local Distribution Network Operator under either the G98 or G99 engineering standard before your system can legally export electricity to the grid. The good news is that for the vast majority of domestic installations, this entire process is handled by your MCS-accredited installer, causes no delays, and costs you nothing extra. This guide explains what G98 and G99 applications are, which one is likely to apply to your home, and exactly what to expect at each stage of the process.
Your DNO, or Distribution Network Operator, is the company that owns and maintains the physical cables, transformers, and substations that deliver electricity to your home. In South East England, that organisation is UK Power Networks, one of the largest network operators in the country. They are responsible for keeping the local grid safe, stable, and capable of handling the electricity flowing through it.
When you install solar panels, your home transitions from being purely a consumer of electricity to also being a small generator. The DNO needs to know about any new generation equipment connected to their network, including solar PV systems and battery storage, so they can account for the additional electricity flow and manage the grid safely.
It is important to understand that your DNO is an entirely separate organisation from your energy supplier. Your energy supplier sells you electricity and will eventually pay you under the Smart Export Guarantee (SEG) for any surplus you export. Your DNO, by contrast, owns the infrastructure your electricity travels along. Many homeowners confuse the two, but they serve very different functions in the energy system.
Failing to notify the DNO is not a minor administrative oversight. The consequences can be significant, and we cover them in full further down this guide.
G98 and G99 are engineering standards published by the Energy Networks Association (ENA). They set the technical and procedural requirements for connecting small-scale electricity generation, including solar PV systems, to the public electricity network.
Think of them as the two regulatory routes available to residential solar customers in the UK. Which route applies to your installation is determined primarily by the size of your system. The standards were introduced to replace an older patchwork of inconsistent local processes, creating a single, uniform approach that applies across all DNOs in the country.
A third standard, G100, exists for even larger systems, but this is not relevant to typical domestic solar installations.
The most important thing to know is that identifying which route applies, completing the required forms, and submitting the application is your installer’s responsibility, not yours. If you choose an MCS-accredited installer, this is a standard part of the service they provide.
G98 is the simpler of the two routes and covers the majority of standard home solar installations. It applies to systems where the total inverter output capacity is 3.68kW or below per phase, which includes most three- to five-panel systems installed on a typical semi-detached or detached property.
Under G98, your installer follows a fit-and-inform principle. This means the system can be fully installed and commissioned first, with the DNO notified within 28 days afterwards. There is no waiting period before work can begin, and no approval is required before the panels go up.
The G98 notification itself is free of charge. Your installer completes a standard form with information about the system, including inverter specifications and their own MCS installer credentials, and submits it to the DNO on your behalf. The DNO does not issue an approval or confirmation under this route; the notification alone is sufficient for full compliance.
For most homeowners in South East England, G98 is the only grid connection process they will ever encounter, and they will notice very little of it happening. It runs entirely in the background while your installer handles the commissioning paperwork.
G99 applies when the total inverter output capacity of your system exceeds 3.68kW per phase, or when certain battery storage systems are added. Where G98 allows the installer to act first and notify afterwards, G99 is fundamentally different: the application must be submitted and approved by the DNO before installation can begin.
This is the critical distinction, and it has real implications for timelines. A G99 application involves a more detailed technical submission, including system design documents, protection relay settings, single-line diagrams showing how the system connects to the grid, and a DNO impact assessment to confirm the local network can accommodate the additional generation.
Timelines for G99 vary. For straightforward domestic applications, fast-track approvals using the Simplified G99 (SGI) process can come through in around 10 working days. More complex cases, where the DNO needs to assess local network capacity in detail, can take 8 to 12 weeks. Your installer will be transparent about which timescale applies to your specific system before any work is scheduled.
In terms of cost, G99 applications are generally free to submit for domestic systems, though some DNOs may charge administrative fees for more complex network assessments. Your installer will advise if any fees apply to your situation.
The decision point is straightforward in most cases. If your system’s total inverter output capacity is below 3.68kW per phase, you need a G98 notification. If it exceeds that threshold, G99 applies.
Adding battery storage can also change the picture. Even if your solar panels alone would fall under G98, certain batteries with high charge and discharge rates may push the combined system into G99 territory. This is assessed at the design stage, so your installer will know the required route before any paperwork is raised.
One common misunderstanding is worth addressing directly: the panel array size in kilowatts does not automatically determine which route applies. A 4kWp panel array does not automatically mean G99. What matters is the inverter output capacity, not the headline wattage of the panels themselves. A 4kWp array can be paired with a 3.68kW inverter and remain comfortably within G98. Your installer’s system design will reflect this.
For easy reference, here is a plain comparison of the two routes:
Not submitting a DNO application is not a minor administrative oversight. It is a compliance failure with a range of serious consequences that can follow homeowners for years after installation.
The most immediate financial impact is on Smart Export Guarantee eligibility. SEG payments, which allow you to earn money for surplus electricity exported back to the grid, require a valid DNO application on record. Without one, you cannot register with a supplier for SEG and you lose access to that ongoing income stream.
Home insurance is another area of risk. Many standard household insurance policies require that any modifications to the property, including solar panel installations, are carried out in compliance with relevant regulations. A missing or incomplete DNO notification could invalidate your policy or complicate any future claims.
Property sales are increasingly affected as well. Mortgage lenders and conveyancing solicitors now routinely check for DNO registration during the sale process. An installation that lacks the correct paperwork can delay or derail a sale, and may require retrospective applications that take time and cause friction with prospective buyers.
Beyond the financial risks, there are genuine safety and liability concerns. If a system connected without proper DNO notification causes a fault on the local network, the homeowner could face significant liability.
By contrast, an MCS-accredited installer is contractually required to submit the DNO application on your behalf and ensure it is correctly filed. This is one of the core reasons to choose a certified professional over an uncertified tradesperson offering a lower price.
Yes, in a meaningful way. A valid DNO application, whether G98 or G99, is a prerequisite for registering under the Smart Export Guarantee.
The SEG scheme allows homeowners to export unused solar electricity back to the national grid and receive payment from their energy supplier at a rate per kilowatt-hour. The exact rate varies by supplier, so it is worth comparing available tariffs once your system is installed and your registration is complete.
It is important to understand that the DNO application itself does not register you for SEG. That is a separate step, completed directly with your chosen energy supplier after installation. However, your supplier will require evidence of a compliant installation before accepting your registration, and a correctly filed DNO notification forms part of that evidence.
MCS certification is the other key requirement for SEG registration. Both the products installed and the installer carrying out the work must hold MCS certification for your application to be accepted by your supplier.
Knowing the sequence of events can make the whole process feel much more manageable.
Step 1: Survey and system design. Your installer visits the property, assesses your roof, energy use, and any existing electrical setup, and determines the system size and configuration. At this stage, they will identify whether your installation falls under G98 or G99.
Step 2 (G98 path): With a G98 system, installation and commissioning proceed on your agreed date with no waiting period. Your installer prepares the G98 notification form and submits it to the DNO within 28 days of commissioning. From your perspective, this happens entirely in the background.
Step 2 (G99 path): With a G99 system, your installer prepares a detailed technical application pack and submits it to the DNO before scheduling your installation date. You will be informed of the expected approval timeline, and your installation date is confirmed once approval is received.
Step 3 (G99 only): The DNO reviews the application, assesses local network capacity, and returns either a full approval, a conditional approval with modifications required, or a request for further information. Your installer manages any back-and-forth with the DNO on your behalf.
Step 4: Installation and commissioning. Panels, inverter, and any battery storage are installed. The system is tested and a commissioning certificate is issued.
Step 5: Paperwork complete. Your MCS installation certificate is issued, the G98 notification or G99 approval is filed, and you can proceed to register with your preferred energy supplier for Smart Export Guarantee payments.
Do I need to do anything myself to get DNO approval, or does my installer handle it?
Your MCS-accredited installer handles the full DNO application on your behalf. You do not need to contact the DNO yourself, complete any forms, or submit any documents. Handling the grid connection notification is a standard part of the service an accredited installer provides as part of your installation. If you are ever asked to manage this process yourself by an installer, it may be a sign that they are not properly accredited and it is worth checking their credentials before proceeding.
How long does grid connection approval take for a standard home solar installation?
For G98 installations, which cover most standard domestic systems, there is no approval process and no delay before installation can begin. The notification is submitted after commissioning and requires no response from the DNO. For G99 installations, the timeline ranges from approximately 10 working days for straightforward fast-track cases to 8 to 12 weeks for more complex assessments. Your installer will give you a clear picture of the expected timeline during the design and survey stage.
Will I need a G99 application if I add a battery to my existing solar panels?
Possibly. Whether adding battery storage triggers a G99 requirement depends on the inverter capacity of the battery system. If the combined output of your existing solar inverter and the new battery inverter remains below 3.68kW per phase, G98 still applies. If it crosses that threshold, G99 will be required before the battery can be installed. Your installer will assess this as part of the battery design process and let you know which route applies before any work begins.
What is the difference between the DNO and my energy supplier?
They are entirely separate organisations that serve different functions. Your DNO (in South East England, that is UK Power Networks) owns and maintains the physical electricity network that carries power to and from your home. They are responsible for the cables, transformers, and substations in your area. Your energy supplier, by contrast, is the company you pay your bills to, and the company that will pay you under the SEG scheme for exported electricity. They buy and sell electricity but do not own the infrastructure it travels along.
Can I lose my SEG payments if my DNO application was not submitted correctly?
Yes. Smart Export Guarantee eligibility requires a valid, correctly filed DNO application to be on record. If your installation was carried out without a proper notification, or if the application contained errors, it could prevent your SEG registration from being accepted by your energy supplier. This is one of the most important reasons to use an MCS-accredited installer: they are obligated to handle the DNO notification correctly and can be held accountable if they do not.
For most homeowners, the G98 or G99 application process is something that happens entirely behind the scenes. Your installer manages it, your DNO processes it, and by the time your system is commissioned and certified, the grid connection paperwork is already in place. From your side, the practical experience is seamless.
The risk, as this guide has made clear, lies in choosing an installer who is not MCS-accredited and may skip or misfile the DNO notification. The consequences range from losing SEG income to complications with home insurance and property sales, and they can emerge long after the panels are installed.
The Solar Co handles all grid connection paperwork as standard, covering G98 notifications and G99 applications for every installation we carry out across South East England. If you are ready to explore solar for your home, request your free survey today and let our team take care of everything, from design through to final registration.
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When homeowners think about going solar, the question that often lingers quietly in the background is: what actually happens to these panels in 25 or 30 years, when they finally wear out? It is a fair concern, and one worth answering clearly. The short answer is yes, solar panels are recyclable in the UK. They are regulated as electrical waste, and modern recycling facilities can recover the vast majority of the materials inside a typical solar panel.. This article covers everything South East homeowners need to know: the UK legal framework, how the recycling process works, what it realistically costs, and what practical steps to take when your system eventually reaches the end of life.
Solar panels are absolutely recyclable in the UK, and they are not destined for landfill at the end of their working life. Under UK law, they are classed as Waste Electrical and Electronic Equipment (WEEE), which means they must be processed at authorised recycling facilities rather than disposed of through general waste streams.
Modern recycling plants are highly effective at recovering the contents of a panel. Most facilities recover between 85% and 95% of the panel by weight, and the most advanced operations push that figure close to 99%. The materials recovered include glass, aluminium, silicon, copper, and small but valuable quantities of silver. Far from being a one-use technology, solar panels are part of a growing circular economy in which the raw materials from one generation of panels can feed back into the production of the next.
Choosing solar is not just clean while the panels are on your roof. With the right end-of-life pathway, it is clean all the way through.
Understanding what goes into a solar panel helps explain why recycling works and why specialist facilities are needed. A typical domestic photovoltaic (PV) panel is composed of the following materials:
The glass and aluminium frames are relatively straightforward to recycle through existing materials streams. Silicon, silver, and copper are more valuable but harder to extract from the assembled panel, so specialist thermal and chemical processes are required. Thin-film panels (using cadmium telluride or CIGS technology rather than crystalline silicon) follow a different, more specialist recycling route, but the same WEEE regulations apply.
Since 2014, solar PV panels sold in the UK have been covered by the Waste Electrical and Electronic Equipment (WEEE) Regulations. These rules place legal responsibility on the producers of panels, which means the manufacturers, importers, and sellers, rather than the end-user homeowner.
Producers are required to join a Producer Compliance Scheme (PCS), such as PV CYCLE, which funds the collection and proper recycling of panels at the end of life. In practice, this means the cost of recycling is built into the original purchase price of your panels. Homeowners should not receive a separate recycling invoice for the panels themselves when it comes time to retire them.
It is also worth noting that UK WEEE regulations were updated in 2025 and 2026 to introduce a new Digital Waste Tracking System and stricter controls on the export of waste electricals abroad. These changes are designed to ensure panels are genuinely processed at approved facilities rather than shipped overseas and lost from the regulated system.
One point worth being firm on: solar panels should not be disposed of through general waste streams and are expected to be processed through authorised WEEE routes. Fly-tipping, or disposing of panels in general waste is not only environmentally harmful; it can expose homeowners or contractors to regulatory action. Using an authorised route is both the legal and the right thing to do.
When panels are ready to be retired, the recycling journey typically follows these stages:
The recovered glass can be used in new solar panels or in other glass products. Aluminium goes back into the metals supply chain. Silicon, once re-purified, can be used in new PV cells. Silver is reclaimed for a wide range of industrial applications. The UK has a small but growing network of approved PV recycling facilities, with a significant portion of higher-grade capacity historically located in mainland Europe. As UK solar capacity expands and end-of-life volumes grow, domestic processing infrastructure is expected to scale accordingly.
Under WEEE producer responsibility rules, the recycling of the panels themselves is funded by the producer, not the homeowner. However, there are practical costs that homeowners typically bear, and it is worth being upfront about those.
The main expense is the safe removal of panels from the roof. This usually requires scaffolding and a qualified installer, and the cost varies with the system size and the complexity of roof access. Collection and transport costs vary depending on location, panel type and volume.. A full domestic system removal and recycling, including labour, scaffolding, and transport to a facility, is typically in the region of several hundred pounds plus VAT for an average-sized array.
If your original installer is still trading, they will often be the simplest route: they can arrange both the removal and the take-back via their Producer Compliance Scheme, keeping the process straightforward.
Before doing anything, it is worth checking whether the system is genuinely at the end of life or simply underperforming. A drop in output might be due to dirty panels, a faulty inverter, or a shading issue rather than panel degradation. A professional assessment could save you the cost of a full replacement and recycling process.
If recycling is the right move, here is the practical pathway:
If panels are damaged or broken mid-life, for example, after a storm, the same WEEE rules apply. Damaged panels should not go into general waste. Your home insurance policy may cover the cost of removal and replacement, so it is worth checking your policy before incurring costs.
Not every panel that leaves a roof heads straight to the shredder. Panels that still generate useful electricity, even if they no longer meet the efficiency standard for their original installation, can be tested, regraded, and resold for second-life use in off-grid systems, agricultural applications, or markets where lower-efficiency panels remain viable and valuable.
There is a growing market for refurbished PV panels in the UK and across Europe, supported by certified resellers who test and warrant the panels before resale. This can extend the productive life of a panel by a decade or more, benefitting the environment and can occasionally generate a small return for the original owner.
That said, second life has its limits. Panels in poor condition, with cracked cells, delamination, or safety concerns, should be recycled rather than resold. Reuse delays recycling but does not replace it, and the quality and safety of any resold panel must be verified before it is returned to service.
Most solar panels installed in the UK under the Feed-in Tariff boom, roughly 2010 to 2019, are still well within their 25 to 30-year operational lifespan. Current end-of-life volumes in the UK are therefore relatively modest, estimated at around 650-1,000 tonnes per year at present.
That picture will change significantly from the mid-2030s onward. Industry estimates suggest that more than 100 million panels could need to be recycled in the UK by 2050. Building the infrastructure, regulatory frameworks, and commercial recycling capacity to handle that volume is a genuinely important challenge, and one that the UK industry is beginning to address.
This is why the conversation about solar panel recycling matters now, even if your own panels are nowhere near the end of their working life. Solar is often described as a sustainable energy source, and that claim is strongest when the full lifecycle is considered: from raw material extraction, through clean energy generation, to responsible end-of-life recycling that returns those materials to productive use. Paired with WEEE regulations and an effective recycling network, solar PV is genuinely a circular technology, a stark contrast to the extract, use and discard model of fossil fuels.
Standard crystalline silicon solar panels, which represent the vast majority of domestic installations in the UK, are not classified as hazardous waste. They are classed as WEEE, which carries its own handling and disposal requirements, but they do not require the specialist containment procedures associated with hazardous materials. Thin-film panels that contain cadmium telluride are subject to additional controls because cadmium is a regulated substance, so if you have thin-film panels, it is worth flagging this when arranging recycling.
Under the UK WEEE Regulations, the cost of recycling the panels themselves is funded by the original producer, not the homeowner. What homeowners typically pay for is the removal of panels from the roof, which requires a qualified installer and often scaffolding. The total cost for a domestic system will vary depending on size, roof access, and installer charges, but the panel recycling charge itself should not fall to you under the producer responsibility scheme.
If your original installer is no longer trading, you have a few options. The panel manufacturer is a good first port of call, as they remain responsible under WEEE regardless of the installation chain. Schemes such as PV CYCLE operate independently of installers and can arrange collection from registered UK and EU facilities. Licensed WEEE waste contractors can also collect and transport panels to authorised recycling sites. Always ask for written confirmation that panels are going to an approved facility.
Yes, broken or damaged panels follow the same WEEE recycling route as panels that have simply reached the end of life. The same regulations apply, and the same authorised facilities will accept them. Do not put broken panels into general household or commercial waste streams. If the damage was caused by a storm or an insurable event, check your home building insurance first, as the cost of removal and replacement may be covered under your policy.
Modern recycling facilities can recover between 85% and 95% of a typical crystalline silicon panel by weight. The most advanced plants using thermal and chemical processes push that figure close to 99%. The glass fraction, which accounts for around 75% of the panel’s weight, is the easiest to recover. Silicon, silver, and copper require more intensive processing but are valuable enough to make the effort commercially worthwhile. Aluminium from the frame is also straightforwardly recycled. Only a small residue of polymer materials represents genuinely unrecoverable waste.
Most modern panels continue generating electricity after 25 years, albeit at a lower output. End-of-life usually reflects declining performance rather than a sudden failure. Solar panels are not just clean while they are generating electricity on your roof. When their working life ends, they are recyclable and regulated, and the materials inside them can be recovered and reused in new products and new panels. Under the UK WEEE Regulations, the recycling cost is largely built into the original purchase price, and the practical burden on homeowners is light: arrange removal through a qualified installer and confirm the panels are going to an authorised facility.
With end-of-life volumes set to grow substantially over the coming decades, the infrastructure and regulations supporting solar recycling in the UK are developing to meet that challenge. Solar PV, done well, is a genuinely circular technology and a responsible long-term investment for your home.
If you are a South East homeowner thinking about solar and want to work with an installer who plans for the full lifecycle of the system, from installation through to eventual recycling, The Solar Co can help. We offer straightforward, sustainability-led advice and full-lifecycle support for every system we install.
Solar panels are among the most reliable home technologies available. Built to last 25 years or more with minimal intervention, a well-installed system will quietly generate electricity through rain, wind, and shine without demanding much attention. That reliability, however, does not mean solar panels are entirely immune to faults. Surveys suggest that most solar owners experience few or no significant problems during the lifetime of their system. But for those who do encounter an issue, knowing what to look for can make the difference between a quick fix and costly damage. This guide covers the six most common solar panel problems UK homeowners face, what causes them, and when to call in a professional rather than investigate further yourself.
The solar inverter is the workhorse of any PV system, converting the direct current (DC) generated by the panels into the alternating current (AC) your home uses. While quality solar panels are routinely guaranteed for 25 years, inverters typically have a lifespan of 10 to 15 years, making them the component most likely to need attention or replacement during the life of your system.
Warning signs of a solar panel inverter fault are usually visible on the unit itself or through your monitoring app. Look out for error codes or fault messages on the display, flashing or red indicator lights, a blank or unresponsive screen, or a significant and unexplained drop in output that does not correspond to poor weather. Some fault codes, particularly those related to grid disconnection or temporary communication errors, can be cleared by restarting the system following the manufacturer’s guidance. Persistent errors that return after a restart, or any physical signs such as scorch marks around the casing, a burning smell, or an unusual buzzing sound, are urgent warning signs requiring professional attention.
Inverters contain high-voltage DC and AC electricity at all times and must never be opened or internally inspected by an untrained individual. Contact an MCS-accredited solar engineer for any inverter fault you cannot resolve through a restart.
A gradual or sudden drop in energy generation is the most commonly reported issue for solar panels not working as expected, and the good news is that it often has a straightforward explanation. Working through the most likely causes in order of simplicity will usually identify the problem before a professional call-out is necessary.
The most common and easily remedied cause of reduced solar panel output is soiling. Dirt, bird droppings, moss, lichen, and general grime accumulate on panel surfaces over time, reducing the amount of sunlight reaching the photovoltaic cells. Even partial coverage on a single panel can have a disproportionate effect on overall system output, particularly in string inverter setups where panels are wired in series. In some cases, professional cleaning may restore output where dirt or bird fouling has accumulated..
Shading from new obstructions is another common cause, particularly in the suburban and semi-rural settings typical across South East England. Growing trees, new garden structures, roof extensions on neighbouring properties, or changes to satellite dishes and aerials can all introduce shading that was not present when the system was installed. Even partial shading for a few hours a day can noticeably reduce overall generation.
Natural panel degradation is also worth considering for older systems. Most quality panels lose around 0.5 to 1 per cent of their efficiency per year. A significant unexplained drop below this rate in a system that is more than five years old may indicate a deeper underlying fault. For many homeowners, the monitoring app provides the first indication of a developing fault long before it becomes visible on the roof. With the app, compare your current output against the same period in previous years on similar weather days. A consistent shortfall is a reliable indicator that something requires attention.
Hot spots are one of the more serious solar panel problems precisely because they are invisible to the naked eye. They occur when a single cell or group of cells within a panel is shaded, damaged, or soiled while the rest of the panel continues to generate electricity normally. In a series-wired string circuit, those faulty cells are forced to absorb power from the rest of the panel rather than produce it, causing them to heat up significantly.
Because hot spots cannot be detected by looking at a panel’s surface, they often go unnoticed for months or even years. A monitoring app may flag consistent underperformance in a particular section of the array, but without thermal imaging equipment, it is impossible to accurately identify the affected cells. Professional thermal imaging surveys, widely available from qualified solar engineers, can pinpoint hot spots quickly and determine their likely cause.
Left untreated, hot spots cause irreversible damage to affected cells and permanently reduce the panel’s output capacity. In serious cases, the sustained heat generated can increase the risk of further damage and, in severe cases, pose a fire safety concern, particularly where the rear of the array is in close contact with roofing materials. If your system is consistently underperforming on clear sunny days and a cleaning has not resolved the issue, a thermal imaging inspection is the most reliable next step, particularly for systems more than five years old or those that have experienced physical damage from hail or falling debris.
The gap between a solar array and the roof surface provides exactly the kind of warm, sheltered, elevated space that pigeons and other birds find attractive for nesting. This is a growing problem across South East England, where urban and suburban pigeon populations are high, and the widespread adoption of residential solar has created numerous potential nesting sites.
The consequences of bird activity beneath a solar array go well beyond visible fouling. Accumulated droppings and nesting debris reduce panel output and can block drainage channels, trapping moisture against the roof. The more serious concern is animal damage to DC cabling. Rodents will chew through insulated cabling given the opportunity, and a compromised DC cable poses an electrical safety hazard requiring urgent professional attention rather than a cosmetic repair.
If you notice birds regularly gathering on or around your array, hear activity beneath the panels, or observe fouling on your roof or gutters that was not present before installation, it is worth arranging an inspection. Professionally fitted bird-proofing mesh or skirting, installed around the perimeter of the array, prevents access entirely and is typically a one-off cost. The same barrier also keeps the underside of the panels cleaner and protects cabling from other environmental debris.
Solar PV wiring faults are among the less visible but more hazardous problems a solar system can develop. They are most commonly caused by corrosion in outdoor connectors, degraded or loose MC4 plug connections, poor terminations during installation, or physical damage to cabling from animal activity or subsequent roof work.
The symptoms are not always obvious. An unexplained drop in output not attributable to weather or soiling is one indicator, particularly if it affects only part of the array. Tripped breakers at the consumer unit or the inverter’s AC disconnect are another. Inverter error codes relating to string isolation, insulation resistance failure, or earth faults are serious warnings that a wiring fault may be present and should never be dismissed without investigation.
Arc faults are the greatest risk associated with degraded wiring. When a loose or corroded connector creates an intermittent connection under load, the resulting electrical arc generates intense, localised heat. Solar PV systems are generally very safe, but any suspected wiring fault should be treated seriously. The risk is real enough that any suspected wiring fault should be treated as urgent, regardless of how minor the visible symptoms appear.
All DC wiring in a solar PV system carries high voltage whenever the panels are exposed to daylight, including when the inverter has been switched off at the AC side. Inspection and repair must only be carried out by a qualified solar PV electrician.
Some forms of solar panel degradation are too gradual or too microscopic to detect without specialist equipment, but their cumulative effect on system performance can be significant. Two of the most common causes of long-term decline in older systems are Potential Induced Degradation (PID) and microcracks.
PID is a voltage-driven effect that causes cells within a panel to progressively lose power output. It tends to affect panels at the edges of a string most severely and can result in losses of 20 per cent or more in advanced cases. PID is more commonly associated with older panel technologies and lower-quality modules, but it can affect any system in which voltage stress interacts with panel materials under specific humidity or temperature conditions.
Microcracks are hairline fractures in the crystalline silicon cells of a panel, too small to see with the naked eye. They are caused by physical stress, which can include hail or heavy snow loading, mishandling during original installation, or the gradual thermal expansion and contraction cycles that all panels undergo over many years. A panel with minor microcracks can continue to generate electricity, but the cracks tend to expand over time and eventually cause cell circuit interruptions that measurably reduce output.
Both conditions worsen progressively. If your system is 10 or more years old and experiencing performance decline that cannot be explained by soiling, shading, or weather, a professional health check is the most sensible course of action. The cost of replacement panels has dropped considerably in recent years, and replacing a degraded module may now be more cost-effective than accepting continued output loss.
Some solar panel problems can be safely investigated and resolved by a homeowner. Others require a qualified solar panel engineer and should not be delayed. Knowing the difference is the most important takeaway from this guide.
The situations that always require professional attention include:
The actions a homeowner can safely carry out themselves include:
Older systems, particularly those showing signs of reduced performance, may benefit from a professional inspection. A qualified engineer can carry out a full visual inspection, check all connection points, test inverter performance, review monitoring data, and identify early-stage faults before they become more serious or expensive to address. For homeowners who are uncertain about the cause of a performance drop, a professional assessment from an MCS-accredited installer is almost always worth arranging sooner rather than later.
If your solar panels are producing no electricity at all, the most likely cause is an inverter fault or a tripped circuit breaker. Start by checking the inverter display for error codes and confirming that the AC disconnect and any associated breakers at the consumer unit are in the correct position. A system restart following the manufacturer’s guidance will resolve some fault conditions, but if the inverter remains unresponsive or returns the same error, contact an MCS-accredited engineer rather than attempting any internal investigation yourself.
Common signs of an inverter fault include error codes or flashing indicator lights on the display, a blank or unresponsive screen, or a persistent drop in output that is not explained by weather. Some minor errors can be resolved with a restart, but persistent fault codes, physical signs such as scorch marks or a burning smell, or unusual buzzing from the unit all indicate a problem requiring professional inspection. Inverters typically last 10 to 15 years, so older units are more susceptible to failure.
A small number of issues are safe for a homeowner to address: cleaning panels from ground level, restarting the inverter following the manufacturer’s instructions, and checking the monitoring app data. Any work involving the inverter, DC wiring, connectors, or roof-mounted hardware must be carried out by a qualified solar PV electrician. DC cabling carries high voltage whenever daylight is present, even when the inverter appears switched off. When in doubt, call a professional.
Most installers recommend a professional inspection every three to five years for a well-performing system, and more frequently for systems over 10 years old. In practice, many homeowners do not arrange an inspection unless they notice a problem, which is why faults such as hot spots and early-stage PID can go undetected for years. A professional health check typically covers a full visual inspection, electrical testing, inverter diagnostics, and a review of monitoring data, and usually takes only a few hours.
Most solar panels come with a product warranty covering manufacturing defects, typically between 12 and 25 years, depending on the manufacturer and product tier, alongside a performance warranty guaranteeing a minimum output level for 25 years. Inverters usually carry a 5 to 10-year manufacturer’s warranty. Physical damage from external causes such as hail or animal activity is generally not covered by a product warranty, though it may be covered by your home building insurance. If you suspect a warranty fault, contact your original installer with your system documentation.
Solar panels are designed to be low-maintenance and are genuinely one of the most durable technologies you can install on a home. The six problems covered in this guide are among the most common issues, from inverter faults and reduced output to hot spots, bird damage, wiring faults, and long-term degradation, and account for the vast majority of solar panel problems UK homeowners encounter over the life of a system. Most are manageable when identified early, and the guiding principle that runs throughout this guide is the same: anything involving electrical components, wiring, or the inverter should be left entirely to a qualified professional.
If you have noticed a drop in output, received an error from your inverter, spotted physical damage, or simply want peace of mind about your system’s condition, The Solar Co can help. We are an MCS-accredited installer based in the South East of England, experienced in diagnosing and repairing solar PV systems of all ages and configurations. Our engineers can carry out a full health check, identify any faults, and provide a clear and honest assessment of your options.
Regardless of the home you own – listed or otherwise – you will still want to cut your energy bills and cut your carbon emissions. Listed building homeowners may worry that this is impossible, but as of 2024, Historic England guidance confirms that solar installations can be acceptable in many cases. As a result, many listed building owners in the UK have installed solar.
This guide will look at the aspects you need to consider when planning solar panels for your listed building home, including:
Though it isn’t always possible for all listed buildings, with the right and sympathetic approach, installing solar panels is achievable.
Yes, it is generally possible to install solar panels on your listed home. In 2024, Historic England published guidance expressly supporting elements such as solar arrays that, in some cases, help with climate mitigation. It states (p. 30), “Installation of panels will generally be acceptable if hidden from view.” However, it also states that, in some cases, it can be in view if it doesn’t harm the ‘special interest’ of the building, notably for more modern buildings.
With few exceptions, however, you almost always need to get Listed Building Consent (LBC). LBC applies to Grade I, Grade II* and Grade II properties as well as buildings within its curtilage, including, for e.g., garages, stables and sheds. Failure to do so can be a criminal offence and lead to fines, prosecution and the forced removal of such additions to the property.
Listed Building Consent, as with planning permission, is assessed by your local authority. It differs in that the planning authority’s conservation team handles LBC.
The process of applying for LBC takes around eight weeks, excluding pre-application approval and any revisions or further consultations. The process itself is usually free of charge, but there may be additional outlay for obtaining pre-application advice and supporting documents such as heritage statements and drawings.
As a first step, it is always advisable to get pre-application advice on the matter, which should lead to a smoother LBC process with higher chances of success. Before taking such steps, it may help to read Historic England’s current guidance (p. 30 onwards) on installing solar panels. The National Planning Policy Framework (NPPF paragraph 164) provides broader policy support for low-carbon measures.
Though many listed buildings have received consent to install solar panels, this isn’t without quite stringent demands. As a first step, you will need to produce a heritage statement that explains how the design will preserve the building’s character and relevance. The statement will cover the following:
Your particular route to having solar panels installed will be unique to your home. As noted in the comments regarding integrated/in-roof systems, while in-roof systems can reduce visual impact, they may be less acceptable where historic fabric would be lost. This is why pre-application advice is key.
There is a range of discreet solar system options you can select to improve your chances of getting Listed Building Consent. These include:
You can discuss this with your local authority ahead of submitting the consent application. Once you have selected the best options for your home, document the visual impact with photo-montages from key public viewpoints to support the formal consent application.
In addition to the hurdles of installing solar on a listed building, the building’s fabric may impose constraints that you need to work with. These include
Ground-mounted systems may also be limited – the curtilage of the listed building is usually covered in its listed status. We will discuss these in the next section.
The conservation officer may advise you during pre-application discussions that you would not be granted consent for rooftop solar. There are still options to consider:
During the consent application process, you can also consider installing a battery storage system. If you have it installed in accordance with building regulations, this may not require listed building consent if installed internally without affecting the historic fabric). With this, you can sign up for certain energy tariffs that offer hourly pricing changes, and use the battery to minimise your energy bills.
A typical 4kW domestic system installed in 2026 can cost in the region of £7,000-£10,000. Heritage installations, due to the paperwork, planning, and additional care required during installation, can cost 10-25% more.
There are programmes like Solar Together where groups of homeowners can come together to arrange multiple home installations in a reverse auction among selected bidders. This can result in significantly lower installation costs, but you will still have to attain Listed Building Consent individually.
Once you have had solar installed, energy savings will pay for it within 9-14 years. You will make savings from:
Research has also shown that energy-efficient measures can increase your home’s value by 2-3%, on a £300,000 listed building, which could be £9,000, covering much of the installation costs.
The Solar Co specialises in installing solar panels on listed buildings. After you’ve invited us to meet you, we will conduct an initial feasibility call at no cost to you to discuss the listing grade, location, roof type, and identify any conservation sensitivities.
Once you have contracted us, the next step will be an on-site survey, during which we will examine the building in more detail. We will assess the roof’s condition and structural soundness, and complete a visual impact review. We will also look at other locations beyond the building itself to assess more consent-friendly approaches to installing a solar array.
You will start the pre-application discussions with the local authority, and we will produce conservation-friendly system designs, photo-montages and a draft heritage statement to support the LBC application. We will also liaise with your conservation officer or appointed heritage consultant.
Once you have consent, our MCS-accredited teams will install the system. The team is experienced in slate, peg and lead roof details, and can work on sites in Kent, Sussex and Surrey.
In many cases, yes. Listed building consent is always required for works affecting a listed property, and planning permission may also be needed depending on the installation. Your installer or planning consultant will usually advise and handle both together.
A standard application typically takes around 8 weeks, though complex cases can take longer. There is usually no fee for listed building consent itself, but you may incur costs for drawings, heritage statements, or professional advice.
Possibly, but it is more challenging. These buildings have stricter protections, so approval depends on minimising visual and structural impact. Panels are more likely to be approved on less visible areas or outbuildings rather than the main roof.
This is a criminal offence. You may be required to remove the panels and restore the building to its original condition, potentially at significant cost. It can also create serious issues when selling the property.
Not always. Solar tiles can reduce visual impact, which may help in some cases, but they involve replacing roof material, which can raise heritage concerns. Whether they’re suitable depends on the building’s significance and the specific proposal.
Just because you live in a listed building doesn’t mean that solar is out of the question. With sympathetic design, a strong heritage case and the right installer, many UK homeowners are successfully reducing bills and carbon while protecting the character of their homes.
Book a free, no-obligation heritage feasibility consultation with The Solar Co’s South East specialists, who will assess the property, advise on likely consent outcomes and design a sympathetic system tailored to the building. The sooner you begin the solar consent process, the sooner you can start saving on energy.
When comparing two solar quotes, you may encounter one company that is certified under the Microgeneration Certification Scheme (MCS) and one that isn’t. In practice, MCS certification is still the benchmark most homeowners, insurers, and lenders expect – the MCS-certified company helps ensure:
This guide will show you:
The Microgeneration Certification Scheme was originally set up by the government in 2006 as a nationally recognised quality mark for small-scale low-carbon installations. It became an independent, profit-for-purpose organisation in 2018 and is now one of the main certification schemes used for solar installations in the UK, alongside alternatives such as Flexi-Orb.
MCS covers a range of small-scale low-carbon installations that include:
The scheme covers both the products being used by installers and the installers themselves, so installers must use MCS-certified components. Consequently, the certification scheme covers the entire installation process from design to installer competence, customer service and post-installation handover documentation.
To meet MCS certification requirements, every competent installer is independently audited against their standards, reducing the risk of unsafe or underperforming installs.
MCS certification also requires the company to be a member of the RECC, HEIC or GGF. These are consumer protection bodies that cover you if, for example, you enter into dispute with us or we cease trading, and you need to be compensated for incomplete work.
In addition to addressing potential problems, an installer’s MCS membership will give you confidence in the installation’s performance. Once the installer has completed the project, the MCS handover pack will confirm your expected annual generation and allow you to check the savings claims made in the sales process against reality.
At a practical level, MCS certification offers you assurance that the installer has the required expertise in electrical, structural and roofing disciplines – and this is not just self-declared.
Regardless of how much energy you use, your solar panels will still produce the same energy for a given amount of sunlight on a given day. The battery, if you have one installed, will store some of the energy too.
The excess energy beyond that stored and used will then be sent to the grid. This is where the Smart Export Guarantee (SEG) comes in – you will sell that excess energy to a supplier for between 4p-15p/kWh at 2026 prices, depending on whom you choose to sell it to. Octopus Outgoing Fixed is the generally accepted benchmark.
To access SEG payments, you must have had your system installed under an approved certification scheme — most commonly MCS. Suppliers will require approved certification before accepting an SEG application.
As well as the SEG, solar panels are also 0% VAT, and will remain so until at least 2027. Beyond the straight-up money-making potential of your installation, there are other benefits to having an MCS-certified installer, some of which are essential to home ownership.
Most suppliers, lenders and insurers are familiar with MCS as the default standard. Using a less widely recognised scheme can introduce additional checks or delays. If you’re planning to get government support for the install, ECO4, the Great British Insulation Scheme and Warm Homes Funding all require an MCS installer.
With other institutions recognising the scheme, certification matters in practice, as without such accreditation, there could be headaches down the line.
Not all solar PV installers are MCS-certified. In your search for one, you may encounter claims such as ‘MCS-style’ or ‘MCS-equivalent’. These do not explicitly state ‘MCS-certified’ and should be a warning sign. If you do contract them, and they fail to issue an MCS certificate within 10 working days, you could face delays, missed SEG payments, and complications later.
You need to be certain that the company is certified from the outset. If you are uncertain of a company’s certification, use the mcscertified.com Find an Installer tool to confirm that they are currently listed and that their certification specifically covers solar PV.
Take a note of their six-digit MCS certification number and ask them to confirm it on their quote and contract. After the installation team installs the array, your unique microgeneration certificate will be available from the MCS Installers Database at certificate.microgenerationcertification.org. You can access it by entering your property address. Additionally, you can confirm this by calling the MCS Customer Helpdesk on 0333 103 8130.
The legal and financial complications of not using an MCS-certified installer include:
The MCS is one of the main nationally recognised accreditation schemes (Flexi-Orb being the other) that are likely to be baseline eligibility requirements for future grant or funding schemes.
To be accredited by the MCS, installers must demonstrate technical competence, have suitable insurance, and have a documented quality management system. The technical competence includes:
Additionally, certified installers must use only MCS-certified products where required under the scheme — panels, inverters and batteries that themselves carry the standard. They must undergo annual audits and surveillance assessments to verify their ongoing compliance. For repeated failures, they can lose their certification or have it suspended until the issues are rectified.
The Solar Co is fully MCS-certified for solar PV and battery storage, with every install delivered under our membership of an approved consumer code — giving homeowners the full set of protections by default.
No — MCS certification is not a legal requirement to install solar panels. However, it is required if you want to access schemes like the Smart Export Guarantee (SEG) and is widely seen as a mark of quality and compliance.
Typically within a few days to a couple of weeks after installation. The installer submits the system details to the MCS database, and once processed, you’ll receive the certificate needed for SEG payments.
Flexi-Orb is a newer alternative certification route that is also recognised for SEG eligibility. However, MCS remains the most established scheme in the UK market and is more widely recognised across insurers, lenders and energy suppliers.
In most cases, no. MCS certification must be issued by an MCS-certified installer at the time of installation. Some companies may offer a full inspection and reinstallation to bring a system up to MCS standards, but this can be costly.
Yes — MCS certification now covers battery storage systems as well as solar PV, provided they are installed by an MCS-certified installer. This ensures the system meets required safety and performance standards.
MCS certification is what separates a compliant, future-proof solar installation from one that may fail at the first claim, sale or insurance renewal.
The three most important things it ensures are Smart Export Guarantee eligibility, insurance cover and resale confidence. If you are uncertain about an installer’s claim to have MCS certification, check them online at MCScertified.com.
Every quote and installation offered by The Solar Co is MCS-certified, and you can be assured of the quality and safety of our work, with all the paperwork handled on your behalf. Get in touch with us for a free, no-obligation quote today.
Solar panels and delicate roof materials may seem like a risky combination, but a team with the right skills and experience can install them safely without compromising the roof.
This guide will show you how a specialist installer will put the solar panels on your roof, what to expect during the process, and most importantly, why choosing the right installer is crucial. The Solar Co has South East England teams who can do this – contact us today for a solar panel quote.
When put in correctly, solar panels can be put on most slate and tiled roofs in the UK. It does require a high level of expertise and skill beyond what’s needed to install them on concrete or metal roofs. A team installing solar panels on slate or tiled roofs should have the specialist skills and experience to do it.
As part of the process, you should expect a pre-installation roof survey to assess the condition and structure of the roof tiles. In some cases, you may need to repair the roof before installing the panels, so that they remain in place for their expected lifespan.
There are five common roof tiles in the UK. All require different approaches to installing your system:
The site survey may reveal that some slates are cracked or brittle before the work begins on installing your solar system – the survey will show these issues.
Slate cracks easily. Solar panel installation teams prefer to use hooks that sit under the tiles and are fixed to a batten or rafter underneath it, avoiding surface penetration. This means that the weight of the solar system is transferred to the roof structure – not the tiles. The mounting rail system sits atop the hooks, providing alignment and structural support.
The hook shape must match the tile shape and thickness:
Particularly if the roof needs extensive repair, Solar PV Slates may be an option. Though these are more expensive, they serve as part of the roof structure, and can look almost identical to the roof slates they replace.
When it comes to fitting a solar system on a tiled roof, there are five stages to the installation process:
We will take a quick look at these stages below.
The roof survey:
During the process of putting up the solar system, the team needs a safe and secure work area to operate in. This is why scaffolding is necessary.
The tiles are selectively lifted or removed using a special tile ripper tool that slides under the tile, releases fixings, and lifts it without cracking.
When it comes to slate tiles, a good installer will minimise breakages and replace like-for-like as required.
Hooks are mounted through the gaps where the tiles have been lifted and fixed onto the roof structure (battens/rafters).
Tiles are then re-laid around the hook, sometimes after being trimmed or notched, so they sit flush, maintain a watertight finish and achieve an even surface profile. Poor cuts can allow water ingress, while misaligned tiles can create stress points that may lead to cracking over time.
Once the hooks are in place, the team will fix aluminium rails on the hooks, horizontally across the roof. These distribute the load across multiple fixing points and provide a flat, level mounting surface. The rails must be perfectly aligned, as even minor errors can become apparent once the panels are in place.
The team then place the solar panels on top and clamp them to the rails. From here, they wire the system into your home.
If done properly, the finished job should be fully weathertight, with no increased risk of leaks.
For a slate roof, this process can take 3-5 days, compared with 1-3 days on a standard roof due to the care required. This means that there will be additional costs.
A slate or tiled roof solar system installation will cost 15-30% more than a standard roof installation. In numbers, a typical 4kWp array will cost around £7,000-£8,000 at 2025 prices, where a slate or tiled roof system will cost £8,500-£10,500 depending on the system size and complexity.
The added costs involved come from:
The higher outlay will result in slightly longer payback time, but a similar savings potential over time to a typical solar installation. This includes the Smart Export Guarantee (SEG), which is available when it is put in by an MCS-certified installer.
When looking for an MCS-certified installer for your solar system, it is important to understand that not every company has the specialist teams to install one on a slate or tiled roof. When booking a survey, always ask about this, as it will save you time and energy.
Either before or during the survey, ask for case studies or photos of work that the team has done before. Also, check that they carry the appropriate liability insurance and can advise on sourcing the right tiles should breakages occur during the process.
The Solar Co has extensive experience with specialist roofing across the South East of England — ask us for case studies and photos before booking a survey of your home.
It might make sense to opt for Solar Slates as an alternative to solar panels. These are slightly less efficient but have a lower profile and a better aesthetic result. PV Slates, like those from GB-Sol, are MCS-certified solar panels designed to look and function like natural slates. Common uses include:
These can cost 1.5x or more than traditional solar panels, but the trade-off is a better look that could be more easily accepted by local planning committees. Where a major roof repair is necessary before installation, this added cost can be absorbed into the roof’s long-term viability.
No — when installed correctly, solar panels should not damage a slate roof. Installers use specialist hooks that slide beneath the tiles and fix into the roof structure without drilling through the slate itself. The main risk comes from poor installation practices, which is why choosing an experienced, certified installer is essential.
Yes — Victorian terraces with slate roofs are a common and suitable option for solar. A professional installer will assess the condition of the slate and the underlying roof structure during the survey. Still, in most cases, these properties can support a well-designed solar system without issue.
Not necessarily. If your roof is in good condition, solar panels can be installed without any additional work. However, if tiles are already brittle, slipping, or nearing the end of their lifespan, it’s often more cost-effective to carry out repairs or a partial re-roof beforehand rather than removing and reinstalling panels later.
In most cases, no — provided the system is installed correctly using approved methods. Reputable installers use non-invasive fixings designed to work with the roof covering. However, warranty terms can vary, so it’s always sensible to check with the manufacturer or installer before proceeding.
Yes — solar PV Slates are designed to blend in with traditional slate roofs, offering a more discreet appearance. They’re particularly popular on period properties or in conservation areas. While they tend to be more expensive and slightly less efficient than standard panels, they are MCS-certified and still eligible for Smart Export Guarantee payments.
Don’t write off the idea of having solar panels installed if you have a slate or tiled roof. This means choosing an installer with the right expertise. The Solar Co specialises in this type of installation across the South East of England – contact us to book a free, no obligation roof survey to find out what’s possible at your property.