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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The loft insulation was handled by Dewey and his team, who were polite, efficient, and respectful of the house. They explained what they were doing and cleaned up afterwards. The home feels warmer alr... See more
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Company details
Written by the company
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.
Contact info
54 Stepney Street, SA15 3TG, United Kingdom
- 01554 788766
- customercare@stellarenergy.org
- stellarenergy.org
4.4
Excellent
228 reviews
Replied to 75% of negative reviews
Typically replies within 24 hours
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Courteous installation leadership
Everything went smoothly thanks to Ken overseeing our installation. He ensured the team arrived on time, followed safety measures, and worked neatly. Our system is running well, and the site was left immaculate. Stellar Energy delivered a truly professional job.
July 31, 2025
Unprompted review
Reply from Stellarenergy
Thank you for sharing your experience. We’re delighted to hear that Ken’s oversight helped everything run so smoothly during your installation. His focus on safety, organisation, and attention to detail is a big part of how we deliver professional results at Stellar Energy. We’re pleased your system is running well and that the team left everything immaculate. Your feedback will be passed on to Ken and the installation crew
1 Star = A reply from Stellar!!🙏
After a lot of research we decided to pick Stellar energy. 1) Because of the good reviews and 2) Because they are a local company. Unfortunately after a promising start I feel we have been wasting our time. Communication to start was excellent bordering harassment to be honest e.g receiving text and emails constantly during the first phase. Unfortunately after the survey things have gone down hill and they have completely ignored my numerous messages and emails sent on a weekly basis ( Having read the other 1 star reviews it is obvious that if you property isn’t worth looking at you get the cold shoulder) We had our survey on the 12/6/25 and we are still waiting 8 weeks later to see what’s going on!! Does the next stage take this long?? Why don’t you answer my messages/emails?? I wish I had gone elsewhere to be honest. Very disappointed after excellent communication during the first phase. If our property isn’t suitable for the work then please let us know. Diolch!
August 9, 2025
Unprompted review
no reply as to why we have not been accepted
hi stellar energy
perhaps if i write a review you will reply
surveyor came and assessed the proprty
i was then told a week later something along the lines that our project didnt fall in to the parameters of their scheme - but this may change - i was given no details why
i was not given the outcome of the energy rating
i asked for this information but i have had no reply
we are currently trying to sort our heating and hot water for the winter
could you please explain to us why we dont qualify so that we can address this going forwards - you told us all providers are different but we have been rejected again and we need some ideas as to why - as we do qualify i understand
date of exeperince - todays date given but i have been trying to get a reply to the questions in my e mail for the last few weeks
please acknowldge here and reply to my e mail
11/8/25
i sent you my details again via e mail - where i had been ignored - this time to customer service - but i still dont have a reply - i amm not putting my contact deatils here for everybody to see - i have sent reminders again to customer service to simply get back to me
August 6, 2025
Unprompted review
Reply from Stellarenergy
Thank you for reaching out.
As of 9.8.25 @8pm, we have not had any reply from you regarding who you are. We have requested your information through TrustPilot but you haven’t replied to us. Unfortunately we can’t assist any further if you won’t reply to us. Please get in touch.
6.8.25
At Stellar Energy, we take all feedback seriously and are committed to resolving any issues our customers may experience. However, due to an increasing number of fake reviews and unverified claims from individuals not known to us, we kindly ask you to provide your full name, address (or installation address), and the best contact number to reach you.
Once we have these details, we’ll be able to locate your account on our system, review the communication trail, and ensure that your concerns are addressed by the appropriate team member.
Thank you for your understanding and cooperation. We look forward to resolving this with you directly.
Kind regards
Customer Support
Stellar Energy UK LTD
Great workers
Great workers, Efficient, excellent work
cleaned up would. Very friendly kept me updated with what they were doing.
Thank you very much James, Martin and Jack
July 4, 2025
Unprompted review
Reply from Stellarenergy
Thank you for your lovely feedback. We’re so pleased to hear that James, Martin, and Jack delivered excellent work while keeping you updated and leaving everything clean and tidy. Their friendliness and efficiency are exactly what we aim for at Stellar Energy, and we’ll make sure your thanks are passed on to them.
A complete waste of time.
A complete waste of time.
Had a survey, was told I would hear 7-10 days, been 8 weeks later, had a email to say can they hace access to my medical files! I ring them stating I still haven’t heard regards survey, ? They said they would ring me back within 24hours… nothing…
With the above mentioned… I would not dare go forward in getting this company to do any work as I see red flags waving like crazy!!! Stay away people
Yes you have spoke to me and offered me a £50 voucher to take off my review .
It was offered if I was to take down my review .. I have messages and photos to prove it… not wasting my time on here…
Avoid this company at all costs . I am not the only person who seems to experience such poor communications and dread to think the workmanship would be like ?
May 16, 2025
Unprompted review
Reply from Stellarenergy
Mr Moran, I have just checked the full communication with you on our system.
1. We sent 2 x emails on 23rd June. Requesting more documents that were not provided on the survey to grant the funding.
2. We then rang you twice in a row on June 25th.
3. Then you rang in and Joe said he would call you back. We do apologise for not calling you back but the communication has been good up until then.
If we can move forward on Monday morning ?
Update :
We said that your property doesn’t qualify after a “subject to survey” assessment. Due to our good nature we offered you a £50 voucher. Not all clients pass for a grant, nothing gained nothing lost. That’s the honest feedback. Leave the bad review there if needs be but you don’t actually receive any services from us for a successful grant application. You can see that others are very happy with our full services when they qualify.
IWI Installers Plasterers
We found Darren & Rhys of IWI Installers to be very professional, with a good work ethic and the plastering they did for us was second to none. We would highly recommend them if you are having work carried out by Stellar Energy.
June 24, 2025
Unprompted review
Reply from Stellarenergy
Thank you for taking the time to share your feedback. We’re delighted to hear that Darren and Rhys impressed you with their professionalism, strong work ethic, and high-quality plastering. Recommendations like yours mean a lot to us at Stellar Energy, and we’ll be sure to pass your praise on to them both
From the first call to the…
From the first call to the installation, Stellar Energy were professional and efficient. Kevin helped guide us through the grant application, always available and incredibly knowledgeable. His assistance made everything less daunting. We’re grateful for the support and look forward to reduced energy bills thanks to our new system.
May 27, 2025
Reply from Stellarenergy
Thank you for sharing your experience. We’re delighted to hear that from the very first call right through to installation, you found our service professional and efficient. Kevin’s knowledge and support are a real asset to our team, and we’re pleased he was able to make the grant application process feel less daunting for you. We’re glad you’re already looking forward to the benefits of your new system and reduced energy bills
Very professional service
Very professional service. Daniel kept us updated and answered all questions. Excellent support from start to finish. Highly recommended company.
May 21, 2025
Reply from Stellarenergy
Hi Mr Hudson
Thank you so much for your kind words! We’re thrilled to hear that Daniel was able to keep you updated and answer all your questions. We’ll make sure to pass your feedback along to him – he’ll be over the moon to hear it!
We pride ourselves on delivering excellent support and it’s wonderful to know you felt well looked after from start to finish. Thank you for your recommendation and for choosing Stellar Energy!
Warm regards,
The Stellar Energy Team
Insulation and heat pump all installed…
Insulation and heat pump all installed to standard contractors by Stellar Energy. Insulation work, excellent and can keep the whole house warm. Solar saves money in the summer. Highly recommended.
March 5, 2025
Unprompted review
Reply from Stellarenergy
Hi !
Thanks for your great review! We’re so glad to hear you’re enjoying the benefits of both the insulation and heat pump — and saving with solar too! Appreciate the recommendation.
Best,
The Stellar Energy UK Team ⚡🏡
Deciding on solar panels was a big…
Deciding on solar panels was a big step, but Jake made the process simple. He took the time to explain the benefits and answered all our questions. Thanks to his guidance, we made an informed decision, and we’re thrilled with our new system. Thanks to Stellar Energy!
January 21, 2025
Reply from Stellarenergy
Thank you for your wonderful feedback! We’re delighted to hear that Jake made the process simple and helped you make an informed decision. We understand that investing in solar panels is a big step, and we’re thrilled that you’re happy with your new system. Your satisfaction means a lot to us, and we truly appreciate your trust in Stellar Energy. If you ever need any assistance in the future, we’re always here to help!
Best regards,
Stellar Energy Customer Services
From the first contact to the…
From the first contact to the completion of the installation, Stellar Energy has been first class. They are competitive in their market but highly professional in the way they conducted the entire process. I’m extremely satisfied with their service and would highly recommend them for solar panel system installations!
January 27, 2025
Reply from Stellarenergy
Hi Gabriel
Thank you for the fantastic review! We’re delighted to hear that your experience with Stellar Energy was first class from start to finish. Providing competitive pricing without compromising on professionalism is exactly what we strive for, so it’s great to know we delivered on that.
We truly appreciate your recommendation and are glad you’re happy with your new solar panel system!
All the best,
The Stellar Energy UK Team ☀️⚡
We were very impressed with Darren’s…
We were very impressed with Darren’s professionalism during our insulation installation. He made sure everything was done properly and left the place clean and tidy. The quality of work was fantastic, and we are so glad we chose Stellar Energy for this project.
January 22, 2025
Reply from Stellarenergy
Hi Mr Johnston,
Thank you for the wonderful feedback! We’re so pleased to hear that Darren’s professionalism and attention to detail made such a positive impression. It’s great to know you’re happy with the quality of the work and the overall experience.
We’re glad you chose us too — and we’re always here if you need anything down the line!
All the best,
The Stellar Energy UK Team 🏡✨
Amazing work from start to finish
Amazing work from start to finish! They made the entire process seamless and stress-free.I’m incredibly impressed with their professionalism and attention to detail. Definitely recommend Stellar Energy.
January 28, 2025
Reply from Stellarenergy
Hi Mr George
Thank you so much for your fantastic review! We’re absolutely delighted to hear that your experience with Stellar Energy was seamless and stress-free from start to finish. Providing a smooth journey for our customers — from initial contact through to installation and aftercare — is something we take great pride in.
It’s especially rewarding to know that our team’s professionalism and attention to detail stood out to you. We believe it’s the little things that make a big difference, and your kind words mean a lot to everyone involved in your project.
Thank you again for your recommendation — we’re so pleased to have earned your trust and are always here if you need anything in the future.
Warm regards,
The Stellar Energy UK Team ☀️🔧
Although I haven’t had the solar panels…
Although I haven’t had the solar panels for long, I must mention that the installation team, particularly Dylan and Andrew, were outstanding. They arrived around 8 AM and worked non-stop until the job was completed in the afternoon. They were not only skilled but also very helpful and knowledgeable.
December 3, 2024
Reply from Stellarenergy
Dear Mr. Sharp,
Thank you for your kind review! We’re thrilled to hear that Dylan and Andrew provided outstanding service during your installation. Their dedication, skill, and hard work are truly commendable, and we’re pleased that they could make the process smooth and hassle-free for you.
Even though you haven’t had the solar panels for long, we’re confident you’ll start seeing the benefits soon. If you ever have any questions or need any assistance, please don’t hesitate to reach out.
Best regards,
The Stellar Energy Review Team
Dan and Dewey did an excellent job…
Dan and Dewey did an excellent job installing our solar panels. From our initial conversation about the layout in the morning, they were efficient and very helpful. They finished the installation on time and left the area spotless. I highly recommend their professional and meticulous service. Thank you!
December 14, 2024
Reply from Stellarenergy
Dear Max,
Thank you for your fantastic feedback! We’re delighted to hear that Dan and Dewey provided such a professional and efficient installation experience. It’s great to know that they took the time to discuss the layout with you, worked diligently to complete everything on schedule, and left your property spotless.
Your recommendation means a lot to us, and we truly appreciate your kind words. If you ever need any assistance or have any questions, we’re always here to help!
Best regards,
The Stellar Energy Review Team
Technician arrived within the expected…
Technician arrived within the expected time window and started surveying while waiting for other crew members. They arrived shortly after and finished installing panels and wires in under three hours. Wires were neatly routed through walls and attic.
November 26, 2024
Reply from Stellarenergy
Dear Bradley,
Thank you for your great review! We’re pleased to hear that our team arrived on time, worked efficiently, and completed the installation in under three hours while maintaining a high standard of workmanship. Neat and professional wiring is something we take pride in, so we’re glad you appreciated the attention to detail.
We truly value your feedback and your support. If you ever have any questions or need further assistance, don’t hesitate to reach out!
Best regards,
The Stellar Energy Review Team
While it's still early to judge
While it's still early to judge, the entire process has gone smoothly so far. The sales representative was personable, informative, and not at all pushy. The installation team today was efficient, friendly, and knowledgeable, making the whole experience enjoyable. I’m just waiting for the inspection before the panels are activated, and then I'll be able to assess their performance.
November 26, 2024
Reply from Stellarenergy
Thank you for sharing your experience! We’re glad to hear that everything has gone smoothly so far and that our sales representative made the process informative and pressure-free. It’s also great to know that our installation team was efficient, friendly, and knowledgeable, ensuring an enjoyable experience for you.
We appreciate your patience as you wait for the inspection, and we’re confident that your system will perform just as expected. If you have any questions or need any assistance in the meantime, don’t hesitate to reach out!
Best regards,
The Stellar Energy Review Team
Excellent service and top-quality work
Excellent service and top-quality work. Highly recommended! 💪🏽
November 13, 2024
Reply from Stellarenergy
Amazing thanks a lot
Had solar panel
Had solar panel, battery, and inverter installed today. The installer was fantastic, very professional, and took the time to explain how to use the apps.
November 9, 2024
Reply from Stellarenergy
Again, fantastic review from Mr Murphy. Another happy customer
Just had solar panels installed
Just had solar panels installed, and I’m really happy with how everything turned out. This company has been communicative, informative, and overall helpful throughout the process. We were initially hesitant about adding panels to our house, but now we’re excited to see the results. The installation crew was respectful and efficient. I would recommend them to anyone.
November 5, 2024
Reply from Stellarenergy
Than for the great words there.
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