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  • Generate free, green electricity
  • Reduce your electricity bill by up to 64%
  • Get paid for what you don't use

The 12 best solar panel installers in the UK in 2024

  • 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
Solar Fast - installing a solar panel

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

Choosing the best solar panel installer is a vital part of investing in solar for your home.

With over 4,000 registered installers in the UK in 2024, finding the right installer for your project can be hard work. 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 through verified reviews. 

After analysing current information about hundreds of companies, we whittled down the field to the 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.

See our methodology for more information on how we selected the best installers.

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

Take a quick look at our comparison table of the the best solar panel installers, their labour and product warranties, and how long they’ve been in business.

Solar InstallerLabour WarrantyProduct WarrantyYear Founded
Project Solar UK10 yearsLifetime2011
Solar Fast2-years25 years for panels, 30-years for performance, 10-12 years for inverters2006
Heatable2 years25 years2017
SolyUp to 12 years25 years2013 (Netherlands; UK 2023)
EggUnknown25 years2010
Glow Green5 years (20 under subscription plan)Up to 30 years2011
Everyone's Energy UK2 years25 years2019
Effective Home2 years25 years2016
0800 Repair1 yearUnknown2017
Clever Energy Boilers2-5 years25/30 years for panels, 10/12 years for inverters2010
Warma UKUnknown10 years for inverters2016
Greener Energy GroupUnknown25 years for performance2014

Best overall: Project Solar

Project Solar - fixing a solar panel to a roof

Midlands-based Project Solar is the UK’s largest solar installation company and among the most accredited and experienced, claiming to have 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


  • Lifetime panel guarantee is the most generous in our rundown by far
  • Among the best-qualified firms on our list, with 11 industry accreditations
  • Dedicated customer service teams and 24/7 monitoring mean you're in safe hands
  • Good prices and no hard sell from reps


  • Installs solar PV systems only, not heat pumps and boilers like some rivals

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 solar panels

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.


  • Customer support is priority, and problems are sorted with friendly efficiency
  • Now covers all of mainland Britain after expanding from the North of England
  • All supplied panels carry a performance guarantee of 85% of original output after 30 years – well above average
  • You also get a two-year labour warranty and 25-year product warranty


  • Trustpilot reviews very occasionally cite delays

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

Heatable website

If you’ve ever wondered how many solar panels would fit on the roof of your house, head for Heatable’s online quote tool. This gives you a 3D bird’s eye view of your home – and a fixed 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.


  • Fixed quote tool lets you plan and budget without dealing with a sales person
  • Some of the best customer feedback we've seen for a solar installer
  • Ongoing care and maintenance after your panels are installed
  • Two-year labour warranty and 25-year product warranty are better than average


  • Exclusively provides REA Fusion solar panels, which may not be the ones you want
  • Not a solar specialist – and many of its positive reviews are for other services such as boiler installation

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 website

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.


  • Labour warranty of up to 12 years is the best we came across
  • Company aims to be carbon neutral by 2030
  • Partnership with Ideal4Finance means a good choice of payment options


  • New to the UK, so may not have as much local knowledge as longer-established regional firms

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) 

Egg (Cracking Energy) website

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.

Despite its business-to-business success, Egg 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.


  • Interest-free payment plans and business loans to help spread the cost
  • Customer reviews frequently mention speed of installation and great customer service
  • Product warranty of 25 years gives reassurance


  • Noticeable emphasis on EV charging rather than solar, especially with business clients

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 website

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.


  • Supplies a wide range of solar products from top brands, giving you plenty of choice
  • Five year labour guarantee is one of the best available
  • Industry awards and years of experience suggest a reliable and professional approach


  • One or two reviews complain that their system wasn't connected properly to the grid for SEG payments, but these were solved quickly

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

Everyone's Energy UK website

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.


  • Partners with Solar Together, so you can get solar panels installed for 30-35% less
  • Supplies a wide range of solar panels and inverters, so you have plenty of choice when designing your system


  • A relative newcomer with under 300 Trustpilot reviews, which doesn't instil as much confidence as thousands of glowing scores
  • Only covers London and the South East

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 website

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”.


  • Budgeting help including free survey, minimal onboarding fee and finance options
  • Two-year labour warranty and 25-year product warranty are better than average
  • Team replies to all Trustpilot reviews, demonstrating commitment to customer satisfaction
  • Supplies market-leading panels from JA Solar, Aiko and Longi


  • UK coverage doesn't include Northern Ireland and parts of Scotland

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

0800 Repair website

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.


  • good one-stop energy shop – instals heat pumps, boilers and insulation as well as solar
  • Staff are trained at the in-house academy, so you can be confident your installer knows their stuff


  • Currently only covers the North of England

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

Clever Energy website

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.


  • Supplies and installs EV chargers and storage batteries as well as panels – ideal if you have an electric car
  • Fourteen years' experience in heating systems and renewables
  • Gas Safety registered as well as solar accredited, so this company is widely qualified
  • Multiple Yorkshire business awards suggest it's well regarded by its peers


  • Currently operates in the North of England only
  • A few negative reviews, but they tend to be about boiler maintenance

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 one-stop shop: Warma UK

Warma website

The second Cheshire-based installer in our rundown (Heatable is based just around the corner), Warma used to operate only in the North West, but now works with installers 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 solar batteries, heating and insulation, so it’s effectively a one-stop shop. However, this may help explain the main grumble that popped up occasionally on Trustpilot: installation delays. If time is of the essence, a local solar specialist may be able to book you in sooner.


  • Installs solar systems, heat pumps, energy-efficient boilers and more, so Warma can build your whole home system
  • Works to get you any available government grants, potentially saving you thousands
  • Excellent customer service, answering your questions throughout
  • Work completed to a high standard by experienced teams


  • Only provides Longi panels – although they are among the best you can buy
  • A few grumbles from customers about delays, but Warma responds quickly

What Warma UK’s customers say:

“Solar panels and air source heat pump (were) arranged and installed so efficiently by a highly competent and friendly team. It has made a massive difference to our lives and I would recommend using Warma UK” Lisa, April 2024

Special mention: Greener Energy Group

Greener Energy Group website

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.


  • Provides plenty of help with grants that could cut your installation bill to zero
  • Winner of multiple awards that reflect its high standing in the industry
  • Has an online shop where you can buy products off the shelf, including EV chargers
  • Finance schemes help you spread the cost of your switch to solar


  • Serves Scotland and some areas of the North of England only

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

solar panel installers on a roof

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 in 2024, using information from key sources including MCS, the industry’s UK standards body. We only considered MCS-accredited installers for inclusion in our research.

We narrowed the field down to the 32 best installers after comparing the products and services they provide. Then 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:

Customer reviews are a reliable source of insight into the quality of a company’s products and services, but we took less subjective factors into account as well.

Here’s a little more about our judging 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 continue to perform at a high percentage of original levels after decades of use.
  3. Customer feedback – for practical reasons we couldn’t test our best solar installers by actually 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 Check-a-Trade, 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.

Simply 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 headshot
Jane is a freelance journalist and copywriter who has spent many years reporting on the benefits of technology for consumers, businesses and our planet.
Reviewed by:
Roland is Editor of The Eco Experts. He is passionate about solar power, reducing plastic waste and technology that can help humanity overcome some of its greatest challenges.
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