These are the 12 best solar panel installers in the UK

• We analysed 643 of the UK’s 4,000 MCS-registered solar panel installers
• We rated the 12 best installers against seven key criteria
• Criteria included customer service, warranties, accreditation and experience
• Read our guide before choosing the best solar panel installer for your home

 There are over 4,000 registered solar panel installers in the UK – credit Solar Fast

Deciding to switch to solar energy is the easy part. Finding the best solar installer for your project can be more tricky, especially if you’re on a tight budget and mindful of the cost of solar panels in the UK. So we’re here to help. 

We researched the UK’s entire solar installation market and chose the best companies on criteria such as affordability and industry experience. We also looked for installers that provide good warranties, supply excellent solar panels, and receive great feedback from customers. 

After analysing current industry information and scouring thousands of verified reviews, we whittled hundreds of companies down to a dozen. We reveal our 12 best solar panel installers below. 

All the installers we considered are fully accredited to install solar panels. All UK solar professionals must be certified by MCS (Microgeneration Certification Scheme), which ensures industry standards and qualifies you to receive Smart Export Guarantee (SEG) payments.

We also prioritised installers who belong to building safety association NAPIT and green sector insurance scheme HIES.

Ready to collect a few quotes now? Fill in our form, and our hand-picked selection of solar installers will be in touch with a tailored estimate.

The best UK solar panel installers at a glance

Here’s a quick comparison table of our best solar panel installers, with an overview of their warranties and how long they’ve been in business.

Best overall: Project Solar

Midlands-based Project Solar is the UK’s largest solar installation company. It’s also one of the most accredited and experienced, having carried out more than 45,000 installations since 2011. Feedback is overwhelmingly positive, with an average 4.6 (“excellent”) from more than 4,800 customer reviews on Trustpilot.

What really stood out for us when scouring customer reviews was the speed of Project Solar’s work, and the repeated praise for good customer service and hassle-free installations. Project Solar’s team responds to every review, positive or negative, so it’s clear they’re committed to engaging with their customers.

Project Solar’s warranties are the best we’ve seen across the entire solar industry. Not only does it offer a 10-year labour warranty, compared with the typical one or two years, but all its solar panels come with an unbeatable lifetime product warranty.

Read our in-depth Project Solar review

What Project Solar’s customers say:

“A first class business, from start to finish I have no complaints. Sales person was excellent, I didn’t feel pressured at all, he explained everything perfectly. Only took two days to complete the job” – Anthony Grimbleby, May 2024

“Good price, quality materials and an excellent job” – Brian Hurst, May 2024

Best customer service: Solar Fast

Solar Fast is the longest-established solar company in our rundown, in business for nearly two decades since 2006. That level of experience is unusual for a solar installer, and helps to explain the excellent 4.7 average from more than 1,500 happy customers on Trustpilot.

The company is a solar specialist, as its name suggests, and it uses highly efficient and powerful 440W DMEGC panels. However, Solar Fast will also supply and fit solar storage batteries, EV chargers and “iBoost” immersion controllers to help you manage your heating.

Customer support, quick troubleshooting and conscientious aftercare get rave reviews. Given Solar Fast’s gracious replies to all comments, even to the point of passing on the direct phone numbers of team members, we can see why its customer service is lauded. Even those who mention quibbles with their solar PV system end up awarding Solar Fast full marks following their rapid response.

Read our in-depth Project Solar review

What Solar Fast’s customers say:

“It’s now a year since our solar panel installation. Solar Fast keeps in touch via email and phone to ensure we have no problems with our panels” – Jackie, May 2024

“Excellent service. Lots of information was provided prior to installation and they answered any questions. Installation happened quickly with minimal disruption. Aftercare was excellent” – Craig Palmer, May 2024

Best for houses: Heatable

If you’ve ever wondered how many solar panels would fit on the roof of your house, head for Heatable’s online quote tool. It gives you a 3D bird’s eye view of your home – and a clear quote. You don’t have to enter your name or contact details, so there’s no obligation to proceed. We thought the quoted prices were excellent, at £5,300 for seven 440W panels with microinverters, or £7,400 for panels plus storage battery.

Our opinion of this Cheshire-based nationwide installer climbed even higher once we saw feedback from customers. Heatable’s Trustpilot reviews number more than 10,000 and average a whopping 4.8 out of 5, with particular kudos given for clear communication and ongoing support.

It’s worth knowing that Heatable only supplies one brand of panel (REA Fusion), although these are ideal for houses and bungalows whose roofs don’t get full sun because they’re optimised for low-light conditions.

What Heatable’s customers say:

“I waited two months to leave this review as I felt it was hard to make a true judgement (straight away). I’m over the moon with my solar and battery installation. The system has far exceeded my expectations” – Andrew Lawton, April 2024

Best newcomer: Soly

Soly is new to the UK, but brings a decade of international experience. Since its creation by two Dutch brothers in 2013, Soly has installed more than 800,000 panels across the Netherlands, South Africa, Belgium, Germany and Italy and claims over 31,000 satisfied customers.

Soly seems set to shake up the UK market with great value packages and outstanding warranties. Unusually for an installer, it displays typical prices upfront on its website, without asking you to apply for a quote. The basic six-panel package with 2.6 kWh battery costs from £6,392 including installation. 

All Soly’s solar panels have a product warranty of 25 years and performance guarantee of 85% output after 30 years, which is far above average. Labour warranties vary, but rise to a staggering 12 years for solar and storage packages.

Customer feedback positively glows, with particular praise given for competitive pricing, attention to detail and polite communication. More than eight out of 10 Trustpilot reviews award five stars, and Soly replies to every comment.

What Soly’s customers say:

“George was very friendly and professional. He went through all the options clearly, answered my questions honestly and took on board my input. There was no hard sell and I didn’t feel pressured into signing up until I was happy” – J Lipscombe, April 2024

Best for commercial installations: Egg (Cracking Energy) 

London-based Egg – also known as Cracking Energy – has a proud roster of business and public sector clients, from the RAC to Swindon Borough Council. It’s keen to appeal to small firms too, with a pledge to “help your business reach its ESG (environmental, social and governance) goals” with solar panels, battery storage and EV charging.

Egg is not just a business installer, however, and is well worth considering for your home’s solar project. Most of its Trustpilot reviews are from domestic customers, who praise the politeness and tidiness of installers. The few negative reviews tend to focus on EV charger installations rather than solar panels.

Egg is committed to making its own workplace a green and positive environment, too. In 2023 it won the Impact Fifty Award for businesses whose employees feel they’re making a real difference.

What Egg’s customers say:

“Couldn’t have been better, amazingly fast, efficient and great communication. Having the interest free payment plan is a bonus, rather than having to front the whole upfront payment on top of the car! Nessy kept us up to date and in the loop at every step of the way” – David Stringer, April 2024

Best on a budget: Glow Green

Glow Green is much more than just a catchy name. This UK-wide installer pledges to keep your budget under control with its like-for-like price match guarantee, which promises to match a cheaper quote from another installer.

Customer reviews suggest Glow Green more than keeps its word, with value for money featuring regularly in the company’s 9,600 Trustpilot reviews.

This Bournemouth-based company offers a whole range of low-carbon home enhancements, including solar battery storage, EV chargers and air conditioning as well as panels. You get plenty of choice, too: Glow Green supplies panel brands including Trina, JA Solar and Perlight, and batteries by Tesla and PureDrive.

What Glow Green’s customers say:

“From start to finish the whole experience of getting my solar panels installed was easy and straightforward. I was kept informed throughout the whole process. Very happy with the system after about 8 months of use” – Gary Featherstone, May 2024

Best for flats: Everyone’s Energy UK

London-based Everyone’s Energy UK has found an innovative way to keep costs down if you live cheek by jowl with your neighbours. It partners with Solar Together, a scheme that gets homeowners and local authorities to buy solar panels collectively, reducing individual costs while sharing the benefits.

For leaseholders, renters and anyone living in a block of flats, this is one of the best ways to go solar at significantly reduced cost.

We’re also impressed by the wide range of top-brand products Everyone’s Energy supplies, which include LG panels with a 25-year warranty, plus SolarEdge and Lux Power inverters.

Among the many excellent Trustpilot reviews (4.8 average) are several that mention the company’s quick installations, which may be partly down to the fact that it only serves London and the South East rather than a wider area.

What Everyone’s Energy UK’s customers say:

“Incredible customer service from start to finish. Literally at every stage from the quote to organising the job, the fitters, the guys who put up the scaffolding, everyone was helpful, polite and extremely friendly” – Lucy Hales, May 2024

Best for social housing: Effective Home

Effective Home instals all sorts of low-carbon ways to keep UK homes warm, including cavity wall insulation and air source heat pumps as well as solar panels and batteries. As well as installing panels for thousands of private customers, the company also supports Local Authorities wanting to build and upgrade council properties.

Customer reviews are overwhelmingly positive, citing non-pushy sales teams, professional installers and good aftercare. Buyers do occasionally mention that Effective Home’s quotes were not the cheapest, but still seem satisfied that the system was worth every penny.

The company is particularly keen to help you spread the cost of your investment. Options include monthly payment plans over 15 years, obtaining a grant with their help, or even paying via subscription – although the latter option is “coming soon”.

What Effective Home’s customers say:

“Not the cheapest quote, but all the gear is top notch quality and functionality – which is why we went with them. Generating much more power than expected, even on a dull day” – Len Parker, May 2024

Best for small businesses: 0800 Repair

Despite limiting its reach to the North of England, 0800 Repair has amassed more than 31,700 Trustpilot reviews – the highest tally in our rundown – and boasts an impressive 4.8 average. That said, reviews are spread across the many services this Leicester-based company offers, which include insulation, boilers and heat pumps as well as solar panels and batteries.

0800 Repair has provided complete renewable energy systems for small businesses and community projects across the North, but it installs solar systems for domestic customers too. To ensure all its installations are top-notch, 0800 Repair has an in-house training centre where its engineers are kept up to speed on the latest solar standards and technologies.

What 0800 Repair’s customers say:

“We have had solar panels, air source pump and loft insulation installed. Every member of the team has been hard working and very easy to talk to. They worked hard through all types of weather and cleaned up after themselves each day… can’t fault them in any way” – John, November 2023

Best for EV owners: Clever Energy Boilers

Keighley-based Clever Energy originally covered Yorkshire only, but also now covers Lancashire, Humberside, Cheshire and all of the Midlands. The firm provides an excellent range of top-notch panels from Longhi, Perlight and Trina, plus batteries, EV chargers and heat pumps, all with excellent labour, product and performance warranties.

Trustpilot and Check-a-Trade reviews are suitably warm, with the firm’s solar services going down particularly well. The scattering of 1-star reviews initially worried us, but not a single one of them is for solar installation, which gets an almost full house of 5-star feedback.

What Clever Energy’s customers say:

“Our solar panels were installed in less time than quoted. We were impressed by the professionalism of the fitters who cleared up everything after themselves. We would definitely recommend” – Sue, July 2023

Best for solar panel grants: Warma UK

Warma installs solar panels and other clean energy measures – credit Warma UK

Warma used to operate only in the North West, but now installs solar panels across the UK. The company is renowned for its excellent customer service before, during and after installation, and proactively tries to get you government grants that will cut your installation bill to as little as possible.

Like many nationwide installers, Warma also provides heat pumps, insulation and other low-carbon home improvements. It’s effectively a one-stop shop.

Customer reviews are overwhelmingly positive, with particular praise for fast installation and professional customer service. Warma undertakes grant-funded work, so it’s inevitable that a small number of reviews mention delays relating to funding applications. This seems a small price for the help Warma gives you in covering the cost of your switch to solar.

This help includes advice on eligibility criteria and the paperwork needed to back it up. “This can sometimes delay things as customers gather that information,” Warma CEO Emma Garner told us. “Securing a grant can add time to the installation, but each case is unique and it usually doesn’t add too much time. With customers paying for their solar installation themselves, we can have their property surveyed and installed in a matter of weeks, sometimes sooner.”

What Warma UK’s customers say:

“For me the whole process from beginning to end was brilliant. The scheme is there to help people have a more efficient and warmer home and that is exactly what it has done for me. There was no cost at all for me to pay as it is a B Government backed scheme. I would recommend it to anybody who meets the criteria. Thank you one and all” – Val and George, October 2024

“The team at Warma UK were fantastic to deal with. From the very start and initial enquiries, right through to the installation any concerns or questions we had were promptly dealt with by an extremely helpful team. Would not hesitate in recommending this excellent company” – A. Russell, September 2024

Special mention: Greener Energy Group

Scotland’s renewables grants are more generous than the rest of the UK, rising to £10,000, so a local installer with specialist knowledge of Scotland’s funding initiatives will be a smart choice if you live north of the border.

Paisley-based Greener Energy Group was formed in 2014 to combine two firms with 30 years’ knowledge of the sector in the region: Greener Energy Savings and Greener Energy Utilities. That level of renewables experience is unusual among the installers we looked at for this article.

Customer feedback is very good, with a 4.5 Trustpilot average and more than 1,400 mostly positive reviews for a range of installation services including heat pumps, electric heating and solar PV systems.

What Greener Energy’s customers say:

“They did an excellent job and ensured that I was set to go! An excellent company. All documents were emailed over two days after completion” – Sandra McGuigan, May 2024

Our methodology explained

How did we choose the 12 best solar panel installers?

We began with an overall analysis of the fast-growing UK market for solar panel installers, using information from key sources including MCS, the industry’s UK standards body. Only MCS-accredited installers were considered for inclusion in our research.

Then we narrowed the field down to the 32 best installers after comparing the products and services they provide. We carefully analysed their verified customer reviews on platforms such as Trustpilot, and chose our top 12.

Finally, we rated the best solar panel installers out of five for each of these key criteria:

1. Labour warranty – a labour or workmanship warranty is a binding promise about the overall quality of the work carried out on your property. It gives you the right to seek help from the contractor if a problem arises within a certain period. The best solar installers offer labour warranties of two years or more.
2. Product warranty – this guarantees that your panels will work for years, usually 25 years. Our top installer guarantees its products for a lifetime. The best solar installers also provide a performance warranty, which guarantees that the system will perform at close to original levels after decades of use.
3. Customer feedback – for practical reasons we couldn’t test our best solar installers by hiring them to put panels on our homes, so we turned to our most trusted sources: customers. We analysed nearly 1,000 real, verified customer reviews via Trustpilot and Checkatrade, and prioritised companies with a high proportion of positive reviews.
4. Customer service – as well as analysing reviews and giving companies credit for responding quickly and graciously to feedback, we also looked for easy ways to get in touch. Several of the companies we considered for this article had email addresses that immediately “bounced back”, so we decided not to include them.
5. Industry experience – installers with 20 years’ experience aren’t necessarily better at the job than those with two years’ experience, but if a company has a long and successful history of installations it’s a pretty good indication of its reliability.
6. Range of services – all the solar panel installers we feature in this article also install solar batteries and inverters, and most install EV chargers. Some have a much wider remit, offering heat pumps, insulation and even boilers. Our star rating in this category is based on a wide range of services, but you may prefer a more solar specialist who doesn’t spread itself too thin.
7. Geographical coverage – we awarded star ratings for wide UK coverage, because there’s little point in raving about a solar installer whose locality means you may not be able to use them. However, do consider installers local to you. They will benefit from local knowledge, and may be able to book you in more quickly.

We didn’t award star ratings for MCS accreditation, since this is a bottom-line must-have for any solar installer.

Next steps

By now, you’ll have a good idea of which solar panel installer is right for you, but have a look at our guide to choosing an installer.

All that’s left now is to take the plunge and go solar, joining more than a million other homeowners.

That number’s only increasing, too – 60% of UK residents want to switch to renewable energy, according to our latest National Home Energy Survey.

The next step is finding the best deal – that’s where we come in.

Pop your details on this free form and let us take the reins. We’ll pass on your details to our professional installers, who will then get in touch with their best prices.

Written by

Jane Hoskyn Contributor

Jane is a freelance journalist and copywriter who has spent many years reporting on the benefits of technology for consumers, businesses, and our planet. She currently writes on consumer issues and sustainability for The Guardian, Expert Reviews, and The Eco Experts. After starting her career in local papers and the music press, Jane found a professional home in magazine features. She was a regular BBC Radio guest during her time as Features Editor on IPC's Web User, then took on similar roles at Broadcast and Computeractive. Jane has also written for titles as diverse as IT Pro and Cosmopolitan and created online content for leading brands. London-born Jane now lives with her husband and their cat in her old university city of Southampton, where she enjoys running, photography, and spotting pigs in the New Forest.

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Tamara Birch Senior Writer

Tamara is a London-based journalist and has written about environmental topics for more than four years. This includes advising small business owners on cost-effective ways, like solar panels and energy-efficient products, to help them become more sustainable.

She has used her journalist and research skills to become highly knowledgeable on sustainable initiatives, issues, and solutions to help consumers do their bit for the environment - all while reducing monthly costs.

In addition to adopting sustainable practices in her personal life, Tamara has worked in the retail B2B space to help independent retailers think about their environmental choices and how they can help improve their business. She now uses this knowledge to help consumers do the same.

Her passion for sustainability and eco-friendly solutions stems from a long obsession with nature and animals and ensuring they feel looked after. In her free time, Tamara enjoys reading fantasy novels, visiting the gym, and going on long walks in new areas.

You can get in touch with Tamara via email at tamara.birch@mvfglobal.com.

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