Sunsave UK Ltd. has earned the title of Which? Trusted Trader of the Month for November 2025.

The London-based company, first established in 2022, specialises in solar panel installation and renewable energy. The company impressed our judges with its exceptional customer service, long-term support and dedication to making sustainable energy accessible.

We spoke to Ben Graves, co-founder of Sunsave, about the company’s rapid growth and how the Which? Trusted Trader endorsement has helped build trust and boost business.

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Making sustainable energy accessible to all

For many, renewable home energy is a desirable but often unattainable goal due to upfront and installation costs. Sunsave aims to change that with its unique subscription-based service - Sunsave Plus.

‘Our goal from day one has been to make low-carbon technology like solar accessible to as many UK homes as possible,’ said Ben. ‘The technology is fantastic - it stands on its own two feet economically - but the high initial cost has kept it out of reach for many,’

Since launching, Sunsave has gone from strength to strength. In just 18 months, the founders secured seed funding, moved into their first office, and received £2.2 million in government funding through the Green Home Finance Accelerator to support the research, development, and launch of Sunsave Plus - the UK’s first solar and battery subscription service.

‘We launched Sunsave Plus in early 2024 and have been growing rapidly since’ said Ben. ‘In March, we were named by Sifted as the 14th fastest growing start up in the UK & Ireland,’ 

‘Most importantly, we’ve seen hundreds of our early customers making fantastic savings - with some households seeing net savings of over £685 per year on their energy bills.’

What truly sets Sunsave apart is its commitment to long-term care. While many installers offer just a two-year workmanship warranty, every Sunsave subscription comes with the 20-year Sunsave Guarantee, covering 24/7 monitoring and maintenance, free replacement parts (such as batteries and inverters) and downtime protection.

Additionally, the company recently partnered with Hive and British Gas to help bring solar power to millions more customers across the country.

Keeping customer care the focus

Sunsave’s mission to make solar energy attainable is matched by its dedication to customer service. The company currently holds a 4.9-star rating on Which? Trusted Traders, with 100% of reviewers recommending its services.

One review reads: ‘Super happy with our solar panel installation from Sunsave! The whole process was smooth from start to finish, and the team really made sure we felt looked after,’

‘We had the system installed in early March, and now in April, we’ve already started to see savings on our electricity bill - such a great feeling! I also really love knowing that for the next 20 years, if we need anything, we can just reach out to Sunsave for help. That peace of mind is huge.’

Our judges echoed this praise, highlighting Sunsave’s ‘outstanding commitment to customer care, long-term protection, innovative transparency through custom software, and ethical, non-pushy sales approach.’

Sunsave’s ambitions don’t stop at solar.

‘Our long-term goal is to become the UK’s first all-in-one home energy platform, combining software, hardware and financing to help households save money and increase their energy independence,’ said Ben.

‘We’re looking to expand beyond solar subscriptions, adding services like EV chargers and  heat pumps, as well as smart software to optimise energy tariffs and earn our customers extra money by balancing the grid.’

Which? Trusted Trader endorsement helps build trust

We asked Ben how being a Which? Trusted Trader has affected business.

‘One of the biggest challenges an early startup faces is trust, and the endorsement from a consumer champion like Which? has helped give prospective customers confidence that they’ll be in good hands.’

Congratulations to Sunsave for winning November 2025’s Which? Trusted Trader of the Month award.

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