Charlotte makes the booking process very easy. I love that you get a message the night before giving a 4 hour slot for the engineer visit and then on the day of the visit you get a message when the... See more
Company replied
While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more
To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more
Created with AI, based on recent reviews
We are a family run renewable energy company based in Fareham, Hampshire. Our approach has always been to provide an honest, trusted and reliable service to our clients and this has supported our business growth over the last 16 years. At Diamond Green Energy we ensure that all of our engineers are kept up to date with all the latest training offered by manufacturers, ensuring that our customers receive nothing but the best service. As a MCS registered company, we also offer you peace of mind. We strive to continually keep up to date with industry changes and new and innovative products that are entering the market so that we can offer our clients the best possible energy saving solutions. If you would like to discuss renewable energy solutions for your property or business
Unit 4, Apex Centre, Speedfields Park, PO14 1TP, Fareham, United Kingdom
Asks customers to review
This company invites their customers to review, whether positive or negative
Replied to 100% of negative reviews
Typically replies within 2 weeks
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
After my tenant's boiler failed, (and the management company took too long to arrange firstly the initial repair, then estimates for a new boiler), I found this company via the Gas Safe register. They carried out a video survey with me and the new boiler was fitted and running two days later. All through this, their customer service was helpful, polite and responsive, despite being very busy.

Reply from Diamond Green Energy Ltd
Robert Nugen your engineer was polite and cheerful. and got on with job.

Reply from Diamond Green Energy Ltd
Had Robert nugent attend for annual boiler service. As usual he was very polite and asked if I had any problems. And done the service promptly and efficiently. As always a 1st class service from a 1st class company. Thank you .

Reply from Diamond Green Energy Ltd
Gas boiler installation was carried out by Steve who was spot on the appointment time, had a quick look at site to make sure everything was as the tender. Steve kept my wife and I informed throughout the installation, worked very hard to make sure the new boiler was up and running by mid afternoon which it was; a nice and warm house after two weeks without heating. Steve was very polite, professional and efficient plus he left the area near the boiler spotlessly clean. Thank you.
Generally a good experience Jake always returns calls if I have a general home owner question, still getting used to a ASHP system over a gas boiler, but happy with Diamond greens energy proses, plus the work force were competent and especially polite which went a long way. Yes I would recommend them
They did a great job, very polite, clean tidy and worked very hard being meticulous to detail. Came recommended to me and I would recommend them to anyone. If you want a good job doing this is the firm.
Had Solar installed by Diamond Green Energy. Mathieu was very informative and helpful through the survey stage. Everyone who came to site were very hard working and extremely polite throughout. Even in the pouring rain! Would definitely recommend.
Engineer on time very polite respectful and professional carried out work no mess left
Easy booking once over coming AI instructions which has been newly installed and requires consideration for elderly users
Reasonable costs, easy to book appointment, Engineer arrives on time, polite service and professional
Easy to make an appointment, was given a time slot and received a text to let me know engineer was on his way. Very polite, worked without leaving any mess, explained and showed me with photos what had been done.
Communication is excellent. Reasonably priced.
Engineer was friendly & polite; also very helpful in showing me how to set the thermostat for different temperatures at various times of the day.
Will definitely use their services again.
I was so very impressed from start to finish with the installation of our solar panels. All questions (of which there were many and often technical) were quickly and accurately answered.
The end-to-end process of the team from surveyor, scaffolders to the final installation was streamlined.
The two engineers (Declan and Andy) were very polite, courteous and highly professional throughout. I couldn’t rate them higher. Attention to detail and setup of the hardware was clear for all to see. They both worked hard, consideration to the layout of the battery and inverter with no corners cut.
I was unable to have my Boiler Serviced on the usual annual date due to Cancer Treatment.
I explained this when my reminder was sent to me & they were kind enough to postpone it for several months & gave me a new date.
I phoned nearer my due date to check when the engineer would be attending as advised them I was still having Radiotherapy in the morning. Thankfully the engineer was coming in the afternoon.
I had a message stating the name of the engineer & that he was on his way & arrived promptly 15 minutes later. He introduced himself + was polite on arrival.
The engineer also helped me download the app for my thermostat to my new phone & stated if I still had issues with the app to let him know & he would pop round to sort it for me.
As always I was very impressed & pleased with the whole service.
Thank you Diamond Green Energy.

Reply from Diamond Green Energy Ltd
Both Drew and his colleague Max were polite and friendly. They completed the boiler and heating system service efficiently and on time.

Reply from Diamond Green Energy Ltd
Very happy with service very polite young man and no mess when doing service.

Reply from Diamond Green Energy Ltd
Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.
We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.
Learn about Trustpilot’s review process.
Here are 8 tips for writing great reviews.
Verification can help ensure real people are writing the reviews you read on Trustpilot.
Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.