Top 10 Best Solar Panel Installers UK

Last updated: December 3, 2023

Choosing an installer for your solar panels can be difficult, since it’s a rapidly growing industry with new businesses opening all the time, and unfortunately there has been a history of failure.

In fact, in a recent report from the Accreditation Service for International Schools, Colleges and Universities (ASIC), over 500 solar companies have gone bust in as little as 8 years. 

This is pretty daunting, especially when you read stories about those that go bust and leave previous customers without support or aftercare.

For this reason, it is important to understand how to vet a solar company or installer, to ensure you get maximum value for money and guaranteed support in the future should something go wrong.

Let’s analyse what’s most critical and then find out which companies are ticking all of these boxes…

Best Solar Installers Key Points:

  • We analysed hundreds of solar companies and only added those companies that met the criteria.
  • This included those that were part of the Microgeneration Certification Scheme (MCS) – essential if you want to receive payments via the Smart Export Guarantee (SEG).
  • We also factored in the age of the company, the warranty offered and customer reviews and ratings.
  • In terms of nationwide coverage, we selected, and we would highly recommend them over regional companies for several reasons, including their reviews and the fact their solar installations are backed by an independent insurance company.
  • For other regional companies, please refer to the detailed list below.

In the video below, you will be able to hear Solar Advice’s summary, which is insightful:

See how much energy you could generate based on your postcode:

Top 10 Best Solar Panel Installers UK:

Best solar company/installer:Best for: coverage
CRC Electrical and RenewablesEast Anglia
Everyone’s Energy UKLondon & South East England
The Eco Roof and Wall CompanyMidlands
0800 RepairNorth East England
Clever Energy BoilersNorth England
Warma UKNorth West England
Greener Energy GroupScotland
Solum GBSouth England
Tile EnergySouth West England
City Energy NetworkWales

What to look for in a Solar Company:

Here is a list of key factors to look for when searching for a solar company to install your new domestic solar system:

  • MSC accreditation -The Microgeneration Certification Scheme is supported by the Department of Energy and Climate Change (DECC) and will provide you with consumer protection.
  •  Microgeneration Certification Scheme (MCS) is also essential if you want to receive Government payments via the SEG scheme, i.e. the solar company must be MCS certified.
  • National Association of Professional Inspectors and Testers (NAPIT) certification.
  • Trust Mark certification – a Government backed scheme.
  • Certification by the Home Insulation and Energy Systems Quality Assured Contractors Scheme (HIES).
  • The age of the company-Many have gone with newer companies with less experience, only to find they have shut up shop when a problem has occurred down the line. The age of the company will also give you an insight into how much experience they have.
  • The insurance the company has-This will protect you in the event of something happening to your property during the installation of your solar panels. Each company should have several types of insurance, but the most important to you as a consumer is Public Liability Insurance.
  • Warranties-Check your installer has both warranties for the product they are selling you and the workmanship. Note not all solar companies will state on their website what their warranties and insurance policies are as they may vary from product to product. When talking to them, go armed with a checklist list of the above.
  • Cost– It’s worth getting at least 3 quotes to compare. Do this from both reputable nationwide companies and regional companies near you, as their rates may vary.
  • Read their customer reviews-Never depend solely on reviews, but the more reviews a company has with high ratings, the more you’ll get an idea about the company and its customer service.

What to Avoid when Choosing a Solar Panel Installer/Company

Avoid the hard sell

Ask for a quote, ask relevant questions, and then get back to them.

If they are sitting in your living room asking you to sign there and then see this as a red flag.

You can completely avoid this type of pressure by opting for a solar company that offers fixed online prices, like

This means everything is online, so you won’t have to worry about hard sell tactics or feeling under pressure.

If they want to sell you extras

A solar company will probably offer to sell you a storage battery as well, maybe even an immersion controller to heat water.

These can be good depending on your budget and goals, but be aware of them selling you more than you actually need, such as heating controls and voltage optimisers.

Recommended reading:

See how much energy you could generate based on your postcode:

Top 10 UK Solar Panel Installers

The Best Nationwide Solar Installers:


At the top of our list as the very best solar company is


This company was launched in 2017, has a customer rating of 4.8 based on over 7,000 customer reviews.

Heatable also offer a 25-year warranty of their solar panels, and they offer a two-year workmanship warranty on their solar installations.

Here are the many other reasons why we prefer Heatable:

  • They are Microgeneration Certification Scheme (MCS) accredited.
  • They are certified as Which? Trusted Traders.
  • They are part of the Home Insulation & Energy Systems Quality Assured Contractors Scheme (HIES).
  • Their solar panel system is optimised for low-light conditions, ideal for the UK.
  • They offer online, fixed price quotes – meaning you can avoid the hard sell and aggressive sales tactics – we aren’t aware of any other company that offers quotes this way.
  • Their solar system is insured by an independent insurance company for added peace of mind.

2. UK Solar Power

Second in the list is UK Solar Power who offers a 25-year product warranty, as well as 12 years workmanship warranty and material warranties, the highest on this list.

They’ve also achieved an average 4-star rating based on 259 reviews.

They also offer maintenance and repairs and will fit electric vehicle chargers.

3. Solar 4 Good UK LTD

Solar 4 Good UK LTD has an average rating of 4.8 based on 240 reviews.

The company also has 15 years experience and are known to have great customer service and aftercare.

Solar 4 good have a range of 9 different solar panels which is one of the biggest ranges of all installers we analysed.

4. First 4 Solar

First 4 Solar has a 3.5 customer rating based on 208 reviews, as well as a 10 years workmanship warranty and 30 years product warranty.

Products include the highly rated JA solar and Jinko panels and batteries.

5. Solar Engineering LTD

Solar Engineering LTD has a 4.8 customer rating based on 50 reviews.

They have 5 different solar panels in their product line including LG and Sharp and over 16 years of experience.

Solar Engineering LTD also provides maintenance and monitoring on top of thethe initial installation.  

6. Joju Solar

Joju solar is 17 years old and has aquired an average rating of 4-stars out of 5.

Joju specialises in not just solar installation but EV charging and was voted solar and storage contractor of the year.

JoJu Solar is also a certified Tesla Powerwall installer and offer a 5-year workmanship warranty along with product warranty.

7. UPS Solar

UPS has an average 4.2 customer rating based on 105 reviews.

UPS offers a range of Sharp products, Q Cell, and JA Solar for both budget and premium options.

UPS was founded in 2006 and has been operating ever since, a pretty good signal of a reliable company.

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8. Rest UK

Rest UK is a newer solar company founded in 2018 but with a high average rating of 4.3, based on 300+ reviews and offers a lifetime warranty on solar panels. 

9. Naked Solar

Naked Solar has an average score of 5-stars, based on 34 reviews.

This 14-year-old company is also REC Certified meaning they offer a Pro Trust warranty, covering products, performance, and labour for 25 years.

10. Callidis Solar

Callidis Solar is 12 years old and in that time has acquired an average rating of 4.6 out of 5.

The brand also offers a Smart Support Guarantee. 

Best Regional Solar Companies

Best in London

PSC Electrical London Ltd

PSC has a check-a-trade rating of 10/10.

Work is covered by a minimum 12-month guarantee. 

Professional Energy Solutions LTD

Professional Energy Solutions LTD have an average 4.8 customer rating, based on 52 reviews.

They also have 15 years experience and offer servicing in London, Surrey, Middlesex, and surrounding areas.

Best in the North West

Warma UK

Warma UK has an average rating of 4.7, based on 500+ reviews.

The company was founded in 2016 and are known for their fantastic customer service. 

Best in Cambridge and surrounding areas

Cahill Renewables

Trust a trader 5 star rating founded in 2013.

Best in the Midlands

The Eco Roof and Wall Company

4.4 rating on 200 reviews and 20 years of experience. 

Best in the Southeast

Deege Solar

Winner of the 2022 Solar installer and contractor award a newer company founded in 2017. 

Best in Reading and surrounding areas

Spirit Energy

5-year workmanship warranty, 4.7-star rating on 107 reviews.

Best in the South-West

Tile Energy

4.9 customer rating on 60+ reviews. Founded in 2012 with a 10-year workmanship warranty.

Best Solar Company in Scotland

The Greener Energy Group

Founded in 2014 this company has a 4.4 customer rating on 2000 reviews.

Best Solar Companies UK Conclusion

As discussed, there has been a history of failing solar companies in the UK, declaring bankruptcy and leaving their customers in the lurch, with a now worthless warranty.

As a result, the best place to start when analysing a solar company is how long they have been in operation – the longer the better.

This shows they have a proven track record and are less likely to fold than newer companies.

After you have checked their history, factor in the warranty period they offer, as if something does go you want to know you will get the support you need – again, the longer the better.

The final place to look is at the customer reviews and ideally look at the reviews on third party platforms, so you know that they are trustworthy and legitimate i.e. Trust Pilot.