Stellar energy project managed my Eco4 insulation, air source heat pump and battery installation. They were quick securing my grant funding. Each stage of the work was inspected and any snags were sor... See more
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Stellar Energy UK: Powering Homes, Empowering Communities At Stellar Energy UK, we believe energy should not only power homes, but also transform lives. As one of the UK’s leading renewable energy and retrofit specialists, our mission is simple yet powerful: to help homeowners and communities reduce their energy bills while contributing to a more sustainable planet. We work closely with trusted suppliers and energy companies including EON, OVO, Octopus Energy, and British Gas to deliver high-quality installations of solar panels, battery storage, heat pumps, insulation, and whole-house energy retrofits. Our expert teams are fully accredited and trained to the highest standards, ensuring every project meets strict compliance and safety regulations. From the initial consultation to installation and aftercare, we are dedicated to providing a seamless and professional customer experience. But what truly sets Stellar Energy UK apart is our heart for the community. We believe that business should be a force for good. That’s why we actively give back to the areas we serve. Stellar Energy proudly supports local charities, including Llanelli Mind and local disability sports teams, providing funding and resources that make a real difference in people’s lives. Whether it’s helping vulnerable households access grants to improve their home energy efficiency or sponsoring local grassroots initiatives, we are committed to empowering people as much as properties. When you choose Stellar Energy, you’re not just investing in your home’s energy future—you’re also supporting a company that believes in fairness, community, and environmental responsibility. Join thousands of satisfied customers who have experienced the Stellar difference. Lower your energy bills, reduce your carbon footprint, and help us build a brighter, greener future for everyone.
54 Stepney Street, SA15 3TG, United Kingdom
Replied to 75% of negative reviews
Typically replies within 24 hours
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No problems whatsoever absolutely brilliant team. Got the job done quick all contractors they used were fast, efficient and polite , can fault them
Thank you so much.

Reply from Stellarenergy
Really friendly team to deal with, with efficient service throughout, no fuss and got the job done. I've already recommended to 2 friends!

Reply from Stellarenergy
I contacted this company for Cavity wall insulation & loft insulation which was completed recently.
I am very pleased with the work carried out and would be happy to refer to friends and family.
Everyone I dealt with was polite, efficient and on time - which is rare for tradesman these days!!

Reply from Stellarenergy
From start to finish the service from Stellar energy was seamless and faultless . I given their number by a friend . Called them up, got a grant for loft Insulation and first time central heating. Both were done within a month of contact and for totally free. They were a bit late to my property so they gave me a 100 quid voucher for MS. I didnt require that but a nice touch . All the work was carried out in a professional manner. I was lucky that I qualified through my benefits . The process was very smooth.. many thanks ..

Reply from Stellarenergy
The whole process took longer than expected, loft insulation happened in January and we were happy with the work carried out, heating was finally installed in September and so far so good.

Reply from Stellarenergy
It is almost two years since I filled in forms etc regarding loft insulation and storage heaters. The loft insulation was done 16 months ago. After many phone calls and promises from Stella Energy about the installation of new storage heaters I am still waiting. Last January when I spoke to Steve he told me they would be installed in the next few weeks. I have a copy of this on an email.
They always promise to ring back but don’t. I spoke to Ashley about a month ago and he said that the forms hadn’t been passed on to the installers and the grant had passed the time limit last October??? I would not recommend this company to anyone. Yesterday I spoke again to Steve (as Ashley is on holiday) and he said he’d ring me back AGAIN. I’m still Waiting.
The only good point for this company is that they are good promisers but nothing comes of it.

Reply from Stellarenergy
Very good work done to a very high level. We had loft insulation installed as well as ridged plastered loft insulation installed in our dormer loft room which was plastered. All the work was completed in two and a half days to a very high standard. We are very pleased with the outcome and would highly recommended Stellar Uk Ltd.
Excellent service from start to finish! Highly recommended
Really nice and professional. really happy with the service and installation. will recommend to all friends and family. Alen Saba
Cavity wall insulation, loft insulation and new boiler completed recently. I am very pleased with the organisation and the workmanship.
Everyone I dealt with was polite and efficient.
I can honestly say I have never met such incompetence. Started off relatively well, survey done, then I was ‘forgotten about’. Loft insulation completed 4 months on but when it came down to the actual electrical work, I have been thoroughly messed around and fobbed off. I must have phoned 20+ times and I always get told ‘someone will call you back, and they don’t. AVOID.

Reply from Stellarenergy
Initially the company were great, had a surveyor out within a week, loft insulation done 1 week later then nothing, after trying to call email and getting nowhere I put a review on here, then next say had a call to say if I take off the bad reviews they would send out a plumber, they also advised as I had already had cavity wall insulation I could no longer have the boiler free, I advised them that when I spoke to someone on the first call I advised I already had cavity wall insulation 12 years ago, they advised I would definitely get a free boiler, the plumber arrived 5 days later that was 2 months ago and no call again so after starting my enquiry in March I have given up.
Thank you for your reply, when I made the first call to you in March I explained that I had already had cavity wall insulation in my property, the reason I asked was because other companies I had called had told me I needed to have the cavity wall installed with them to be able to have a free boiler, you advised me because I was having loft installation I would be able to have a free boiler even though I already had cavity wall installed, can I also ask why you’re coming back to me through trust pilot but never reply to calls I have made.

Reply from Stellarenergy
Loft insulation fitted by Dewey and Jordan who explained everything clearly, did a quick and professional job and tidied up before leaving - even helped me to lift some heavy things.
Great company - efficient pleasant guys who arrived on time , put insulation in my roof and ...........
cleared up after with a hoover!!
Thank you guys.
Dewey and Jordan arrived to fit loft insulation. Arrived before time and were very courteous and professional. They provided a full explanation of the work to be undertaken and once finished, and supplied an advice sheet also prior to leaving. From initial assessment, to the inspector George (who was so lovely), the loft insulation has been fitted within 7 days which is excellent. After being messed around and let down by so many other companies, we cannot fault these guys! Thank you!
I had arranged for a boiler and heating grant for my grandfather, he’s been without gas for just under 6 years.. the workers and the company did an amazing job and was very easy to work with. They was a massive help in boosting my grandfathers mental health and understood the difficulties of the home. I would highly recommend. Thank you to the stellar energy team.! We are so great full for everything you have done.
Initial survey was professional and well explained. The two guys who came to fit extra insulation (Scott and Nicky) and lift lift boards etc today were great. Very professional, friendly, worked non stop and very clean and tidy. Explained things throughout... Excellent...!!
The guys arrived on time, friendly and professional service, cleaned up after themselves, I would recommend their work.

Reply from Stellarenergy
Great job installing additional loft insulation. Really efficient workers and they cleaned up once finished.

Reply from Stellarenergy
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