Diamond Green Energy Ltd Reviews 

2,702
TrustScore 5 out of 5

4.9

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Review summary

Created with AI, based on recent reviews

Looking at 337 reviews, reviewers overwhelmingly had a great experience with this company. Customers frequently praise the professional and knowledgeable engineers who always arrive promptly, respect people's homes, and complete solar and boiler installations smoothly from start to finish. Consumer feedback focuses on the exceptionally helpful support team, emphasizing that staff members are polite, responsive, and always ready to explain every technical detail clearly. Some reviewers were not happy with specific aspects of the service, mentioning poor aftercare support or unexpected technical problems with heating systems following maintenance visits. People also mentioned encountering frustrating situations where responses to post-service complications fell short of expectations and left them seeking alternatives.

What people talk about most

Service

Reviewers mention positive feedback about service, noting that engineers are polite, professional, and carry... See more

Staff

Clients share positive opinions on staff, highlighting their professionalism, efficiency, and friendliness... See more

Customer service

People report positive experiences with customer service, noting that communication is consistently excellent... See more

User experience

Customers had positive experiences with user experience, reporting helpful and professional service from... See more

Product

Users describe positive interactions with product, expressing great satisfaction with the overall quality and... See more

Reviews shaping this summary

Rated 5 out of 5 stars

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

Rated 5 out of 5 stars

We had our boiler moved as part of a loft conversion and Steve and Tom were both brilliant. They genuinely went above and beyond, were really professional throughout, and made the whole process easy a... See more

Company replied

Rated 5 out of 5 stars

Good service. Company kept in touch about timing. Clean tidy engineer who not only serviced our boiler bought from Diamond but service our gas fire thoroughly too. Excellent service, 9 years we have b... See more

Company replied

Rated 5 out of 5 stars

Diamond Green Energy installed 18 solar panels, inverter and battery storage. The work was more demanding on an old house. All members of the team were good to have onsite. They were quick to resolve... See more


Company details

  1. #10 of 45 best companies in Gas installation service
  2. #4 of 23 best companies in Air Conditioning Contractor
  3. #8 of 60 best companies in Gas engineer
  4. #13 of 74 best companies in Central Heating Service
  5. #13 of 118 best companies in Heating service
  6. #2 of 52 best companies in Solar Energy Company

Written by the company

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


Contact info

4.9

Excellent

TrustScore 5 out of 5

3k reviews

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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

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4.9

All reviews

(2,702)

301 reviews in the last 12 months

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Companies on Trustpilot aren't allowed to offer incentives or pay to hide reviews. Reviews are the opinions of individual users and not of Trustpilot. Read more
polite

Rated 5 out of 5 stars

Replacement boiler

We had a problem with our boiler not firing up and decided to replace it. Diamond were great from start to finish and fitted a replacement boiler inside a week. Jay the engineer did an outstanding job, worked tirelessly, overcame a couple of obstacles like a seasoned pro and was extremely polite and tidy to boot. For such a young guy he did a fantastic job and is a credit to Diamond! Two weeks on and we’ve had no problems at all. Very happy customer.

21 January 2025
Unprompted review
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you for choosing Diamond Green Energy. I will pass on your comments to Jay, who will be so pleased with this review. Thank you for putting your trust in him. He is already proving himself to be a real asset to the company.

Rated 5 out of 5 stars

Excellent

Allways helpful and polite the gentleman that did the boiler service

30 January 2025
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you for choosing Diamond Green Energy, your business is appreciated.

Rated 5 out of 5 stars

Seven years with DH

On time and very efficient polite and knowledgeable

29 January 2025
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you for choosing Diamond Green Energy, your business is appreciated.

Rated 5 out of 5 stars

"Exceptional Service from Start to…

"Exceptional Service from Start to Finish"

"I recently had my Gas Combi Boiler replaced and a Power Flush performed by Diamond Green Energy Systems, and I cannot recommend them highly enough.

From the initial consultation with Stephen, the sales representative, I was impressed by his professionalism and knowledge. He patiently addressed all my concerns, provided clear and informative explanations, and ensured I understood all aspects of the installation process.

The installation itself was incredibly efficient. Engineers Steve and Jay arrived on time and worked diligently throughout the day, completing the entire job within a single day on a Sunday! Their work ethic was outstanding, and they maintained a clean and tidy workspace throughout the installation.

Both Steve and Jay were incredibly polite and professional, always willing to answer my questions and offer helpful advice. Their attention to detail was impressive, and they went the extra mile to ensure I was completely satisfied with the installation.

Overall, I am extremely satisfied with the service provided by Diamond Green Energy Systems. The entire team, from sales to installation, exceeded my expectations. I will not hesitate to recommend them to anyone in need of plumbing and heating services."

26 January 2025
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you so much for your detailed review. We are so pleased you are happy with the installation provided by Steve and Jay.

Rated 5 out of 5 stars

Quick and efficient

The technician was polite and efficient, I had plenty of notification of his visit.
The job was carried out with no disruption, the technician asked if I had any questions before he left, and said not to hesitate, to contact if problems.

21 January 2025
Rated 5 out of 5 stars

Ìnformed in advance of engineer…

Ìnformed in advance of engineer arriving.. engineer polite and got on with boiler service...no problems.

17 January 2025
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Reply from Diamond Green Energy Ltd

Thank you for taking the time to review us, your business is appreciated.

Rated 5 out of 5 stars

Great service from Diamond Green for 97-year old client

Diamond Green did a brilliant job installing my 97-year old Mum's new boiler within a week just before Christmas and then coming to do a follow up visit to carry out a power flush. Engineer Drew was polite, tidy and you almost didn't know he was there. Great job and thank you!

17 January 2025
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Reply from Diamond Green Energy Ltd

Thank you for taking the time to review us, your business is appreciated.

Rated 5 out of 5 stars

The fact that the company contacted me…

The fact that the company contacted me prior to the engineers arrival I found a useful idea. On arrival the engineer was pleasant, and got onto the task immediately, no wasting of time. When asking questions the engineer was polite. I find Diamond Green to be a very professional company whose engineers are very proficient.

16 January 2025
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you for taking the time to review us, your business is appreciated.

Rated 5 out of 5 stars

Excellent service

Excellent service, polite and friendly. Kept me informed.
Arrived on time.

16 January 2025
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you for taking the time to review us, your business is appreciated.

Rated 5 out of 5 stars

Excellent service

Excellent service.
Engineer very polite and friendly. Also had respect for my home, left very tidy and clean.

15 January 2025
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Reply from Diamond Green Energy Ltd

Thank you for taking the time to review us, your business is appreciated.

Rated 5 out of 5 stars

Annual Boiler Service

We have our boiler serviced annually by Diamond Gas which was installed by them. They are always polite and professional on every visit. They are a very good company and a credit to there trades,. If anyone is interested in buying a new boiler go to Diamond Gas,you don’t get a lot of spiel from them just honest facts.There employees are a credit to there firm

6 January 2025
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Reply from Diamond Green Energy Ltd

Thank you so much for your kind review. Reviews like these are invaluable to a small business, so we really appreciate it.

Rated 5 out of 5 stars

Boiler and gas fire service

The interesting thing about Diamond energy is the engineers who come and do your work are all polite courteous and importantly, genuinely friendly they’re a pleasure to have in your house.
They explain everything clearly what they’re doing, what they are going to do and everything runs a dream.
I personally wouldn’t use any other company, I have done in the past but this outfit is a really professional company who do good work at reasonable prices.
Very pleased today

6 January 2025
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you so much Mr Harding. We really appreciate your kind review. Reviews are invaluable to a small business like ours, and it helps others to understand our work ethos. ALL our engineers are a credit to Diamond Green Energy, so its lovely that you have acknowledged them. Thank you

Rated 5 out of 5 stars

Man who came was polite and respectful

Man who came was polite and respectful, carried out the gas check quickly and efficiently, didn't leave any mess. All round very nice man

18 December 2024
Diamond Green Energy Ltd logo

Reply from Diamond Green Energy Ltd

Thank you for taking the time to review us, and for your continued custom.

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