Sunsave is an installer with a mission to make solar accessible to all UK households – which is why we're offering the country’s first solar subscription service.

Sunsave Plus allows you to start saving on your energy bills immediately, without having to pay anything upfront.

You’ll get the best-in-class kit installed on your roof, access to one of the best export tariffs around, and the 20-year Sunsave Guarantee, which includes 24/7 monitoring, maintenance, a free battery upgrade, a free inverter replacement (if required), and downtime cover – all for a fixed monthly fee.

Your system will also be insured by Aviva against damage, fire, and theft.

Alternatively, you can pay upfront for your system with Sunsave Standard, which includes a two-year workmanship warranty.

As well as passing the various tests set by the UK’s most rigorous accreditation bodies (check out our accreditations), we have also attracted millions of pounds of funding from numerous backers including the government, through its Green Home Finance Accelerator initiative.

And we're a Which? Trusted Trader, making us one of the highest quality installers in the field, according to the UK's consumer champion.

We're based in London, but we serve households in England, Wales, and the southern half of Scotland.

To learn more about what our customers think, check out our reviews page.

Adept Renewables provides a comprehensive solar service to households all over Dorset, Wiltshire and Hampshire.

As well as handling the design and installation of JinkoSolar panels and Greenlinx batteries, this small business also provides aftercare, in the form of a £24.99-per-month maintenance package.

For this fee, you’ll get an annual clean and electrical inspection, as well as the installation of replacement equipment, as long as it’s under the manufacturer’s warranty.

You can still find the company’s owner, Steven Hook, out on jobs every day, providing the kind of excellent service that’s led dozens of customers on Checkatrade to personally recommend him as friendly, professional, and reliable.

Mr Hook told Sunsave that his company’s success was down to its “unwavering commitment to customer satisfaction and our expertise in crafting tailor-made solutions. 

“We consistently exceed expectations by engaging closely with clients to understand their unique energy needs and environmental contexts.”

Andy Wood founded this business in 2018 with four employees, and has since expanded his team to 16.

The company's reputation has also grown, with ratings and reviews that reflect his staff's hard work, even if it hasn't yet become a Which? Trusted Trader.

The firm also takes its role in the local area seriously. On its website, it says that "we are passionate about serving the community", and that's not just lip service.

Mr Wood got his start as an 18-year-old apprentice more than two decades ago, and has since given the same opportunity to other local teens – with some help from Warwickshire County Council.

In 2024, he received £6,000 from the local authority to take on three apprentices. At the time, he said: "We work a lot in schools and with businesses and homeowners, so the stronger we are the better we can help the community.

"We take two or three work placements a year from each school and a couple of those have gone on to start apprenticeships with us."

Tile Energy has served customers for well over a decade and still has a fantastic score on Checkatrade and Which?, which is no mean feat.

The company installs Tesla and SolarEdge batteries with a 10-year guarantee, and provides a 12-year guarantee on its SolarEdge inverters.

You’ll also receive a workmanship warranty of up to 20 years, which makes it one of the best on the market.

Leke Alabi, who runs the business, said in 2021: "We're not going to give people a service for the sake of giving them a service. We are providing a solution."

He added: "We are a down-to-earth company and we provide bespoke advice and design".

Tile Energy recently doubled its workforce from four to eight, and expanded its fleet as well – both signs of a successful, growing business.

Customers have almost exclusively given this small, Bromley-based business perfect ratings on Trustpilot, with the installer's professional, knowledgeable, helpful approach shining through.

This holds true on Which?, where reviewers have all awarded the company five stars in every category.

Currently, the company offers Canadian Solar and JA Solar panels, as well as batteries from Tesla, SolarEdge, and Sunsynk.

The business’s site also includes a savings calculator, which is useful but needs a bit more development.

In 2022, in the face of rising customer demand for their solar services, Paul and Chris Warnham launched this family-run business as an offshoot of construction company SW3 Services.

The company has gone from strength to strength ever since, attracting full marks from hundreds of customers across review sites including Checkatrade, Which? Trusted Traders, and Google – and we can see why.

Chris has around two decades of electrical experience, and together with Paul, they provide "a holistic approach to sustainable energy", according to their company's site.

"We assess your property’s unique needs, expertly install solar solutions, and provide ongoing maintenance."

SW3 Green Energy Services covers most of southern England, and also installs heat pumps.

Since 2011, this small business run by husband-and-wife team James and Samantha Kirby has served its southern area in a professional, dedicated manner.

As a result, it’s earned hundreds of perfect reviews on Checkatrade – and the company cements its customer-friendly status by offering a five-year workmanship guarantee, which is about double the industry standard.

Talking on the Brilliant Businesses podcast in 2023, Mr Kirby said his company’s motto – ‘we do things differently’ – refers to the way it treats the public.

“It's customer service and how we try to look after people. Around this area, there don't seem to be too many companies that worry about that too much,” he explained.

“20-30% of our diary's filled up with small jobs, because a lot of other electrical companies locally just don't want to know. They just put the phone down.”

However, like every firm on this list apart from Sunsave, it doesn't offer a solar subscription.

This Cheshire company expanded in 2023 to serve many regions of the UK, including Scotland, north Wales, and east England – but only its original branch is a Which? Trusted Trader.

You can see why the business went national, as its north west division has been recommended by 100% of its customers on Which?, with perfect ratings for customer service and quality.

The family-run firm, which is led by David, Elaine, and Charles Lukeman, provides households with Qcells solar panels and batteries.

Speaking to Plumbing, Heating and Air Movement News in 2023, David Lukeman said: “Having built my own business over a decade, I take great pride in our reputation for reliability and service.

“We are profitable and have been fortunate to attract nothing but great reviews in 10 years. That level of success indicates our level of commitment.”

Heatable is an established, trusted name in boiler installations, and the company has expanded into solar with success.

Its founders, brothers Sam and Ben Price, have built a reliable, nationwide service that supplies customers with REA panels, Enphase microinverters, and Alpha ESS batteries – and Ben often helps out with installations.

Customers can use a free online tool to give them an idea of what they’ll pay without having to hand over any personal details or committing to anything.

All they need to do is provide their annual electricity consumption and outline which roof space they’d like to use – but bear in mind that scaffolding costs aren’t included in the quote.

You should also consider that Heatable’s main focus isn’t on solar – the great majority of its Trustpilot reviews are about boiler jobs – and it offers an underwhelming two-year installation warranty.

And though it offers solar panel loans, it doesn’t provide a subscription service.

Tammy, Michael, and Bradley Wayman run this home improvements company, which installs solar & battery systems alongside heat pumps, boilers, EV chargers, and insulation.

According to its website, the Welsh firm is "all about tackling fuel poverty, reducing carbon emissions and saving you money on your energy bills."

To help achieve this goal, the team of more than 30 people works with solar manufacturers including Duracell, SolaX, Fox ESS, and Sigenergy.

Customers can also access finance options through the firm, though its representative APR for a solar panel loan is 9.9%, as of April 2026.

HSEnergy Group, formerly known as Home Smart Energy, has designed and installed more than 10,000 solar installations – and well over half of these have happened since 2021.

Since 2015, the business – run by Neil and Vivienne Mitchell – has taken on more than 25 employees, and now installs solar panels made by Phono Solar, DMEGC Solar, and JA Solar, and batteries made by Pylontech or Fox ESS.

In a January 2024 edition of the Burgess Hill Business Parks Association newsletter, Mr Mitchell wrote: “HSEnergy Group has proved that a personalised solar package can offer outstanding protection against energy inflation, while reducing household bills.” "

Though it operates all over the country, the company also has strong roots in its West Sussex community.

Mr Mitchell said his business had a focus on “community engagement and development” in the same newsletter article, and the firm has proven itself by partnering with group-buying scheme Solar Together, which makes it easier for households to go solar.

Accreditations

We chose accreditations created by the following organisations as the most important hurdles for solar panel installers to clear, due to their integrity, independence, and expertise: