Endorsed by Which?

Cahill Renewables

5.0

77 Reviews

Opening Hours
Today - 09:00–18:00
  • Monday 09:00–18:00
  • Tuesday 09:00–18:00
  • Wednesday 09:00–18:00
  • Thursday 09:00–18:00
  • Friday 09:00–18:00
  • Saturday - Closed
  • Sunday - Closed

Why you can trust this trader

After undergoing rigorous assessment to become endorsed, every Which? Trusted Trader agrees to our Code of Conduct. This gives consumers the reassurance that they have the best possible protection and adds an extra layer of security to ensure best practices and procedures are followed. Which? fully investigates any breaches and will take any necessary action to ensure consumer protection.

About

Your local solution to global problems.

Our goal is to 'renew renewables' with our hands off approach. Remote quotations from expert home energy consultants until you're ready for a survey.

Reach out to us on 01206 646664 to have a quote within the hour and reduce your electricity bill by up to 80%.

What we do

  • Renewable energy

    • Air source heat pumps
    • Ground source heat pumps
    • Home energy analysis
    • Solar Panel Maintenance
    • Solar panels
    • Solar water heating
    • Domestic wind turbines
  • More Services

    • battery storage
    • solar batteries

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

100% of the reviews we publish have been through our stringent moderation process.

5.0
77 reviews
Customer Service
5.0
Quality
5.0
Value
4.9
Sort by
Solar panels on barn roof
Customer Service
Quality
Value
Our whole experience with Cahill has been fantastic. All the work was done within the agreed schedule and everyone we dealt with has been very professional nothing has been too much trouble .I would recommend them wholeheartedly.
Customer in Essex Posted on 16/06/2026 , work completed 02/06/2026
Solar & Battery install
Customer Service
Quality
Value
The whole Cahill team were helpful & polite, even when the installation plan went off course (due to no ones fault), so took a bot longer than hoped. The overall install is as I wanted and performs well (wish I`d pushed for more panels!) so overall I`m very pleased with Cahill and their work. Referred them to a number of people I know, who don`t want to use a faceless national sub-contract out service!
Customer in Essex Posted on 30/03/2026 , work completed 22/12/2025
Excellent job!
Customer Service
Quality
Value
This has been a hugely positive experience for us right from the first time we reached out. The remote design engaged with what we wanted, answered our questions and produced a solid quote. Surveyor arrived on time and was helpful with advice. The scaffolders arrived two days before installation and did their job without any fuss, were very polite and left the site neat and tidy. Installation day went like clockwork. Team arrived on time and set about their different tasks; panel team and electical team. Again, polite, careful and tidy workmanship. 16 panels and all the kit fully fully installed and fully working in 6 hours. Magic.
Customer in Suffolk Posted on 12/03/2026 , work completed 06/03/2026
Fantastic service from start to finish
Customer Service
Quality
Value
Have been extremely pleased with the service provided by Cahill Renewables from start to finish. Pre-Sales advice and response times were fantastic, I had lots of questions and looked at many different variations of system and their team was able to support me in making the final decision. The installation itself was extremely smooth, I honestly couldn't quite believe it could be achieved within a day but the team got everything done with minimal disruption, power off for no more than 5 minutes and I'm extremely happy with the quality of workmanship. I wouldn't hesitate to recommend Cahill Renewables to others.
Customer in Essex Posted on 02/03/2026 , work completed 24/02/2026
Solar panels plus battery storage
Customer Service
Quality
Value
Found this company on Which trusted traders. Gave a very competitive quote for 10 panels plus 20kw battery and upgraded converter capacity upon request for no additional charge. Work was completed and certificates done for electricity export, plus rapid response when small glitch with sensor occurred.
Customer in Suffolk Posted on 27/02/2026 , work completed 19/09/2025
Recommended
Customer Service
Quality
Value
Very happy with our installation, would recommend. As said, very happy with our installation, would recommend.
Customer in Kent Posted on 25/02/2026 , work completed 27/09/2025
Home battery Installation
Customer Service
Quality
Value
Everything was dealt with very efficiently and quickly. Zero issues. Install was quick and clean. Follow up questions were answered very quickly and really could not have had a better service. Would highly recommend.
Customer in Cambridgeshire Posted on 24/02/2026 , work completed 11/11/2025
what a pleasure it has been to do business with such a friendly and helpful company.
Customer Service
Quality
Value
I must say what a pleasure it has been to do business with such a friendly and helpful company. Josh, you have been brilliant and very helpful explaining the ins and outs of how the system works and making sure that we have the best system that meets our needs. Ross our surveyor was also helpful, friendly and very knowledgeable. The ladies in the office were friendly and extremely efficient. Even James your delivery guy was friendly. And finally Jim our engineer. What an: Amazing, conscientious, happy, helpful and knowledgeable young man he is. Nothing was too much trouble and his work was exemplary. So neat and tidy and not a scrap of mess left behind. He explained everything to my husband Brian and I, went through the app with us and went well beyond what we would expect from him. So thank you all for making this a pleasurable and exciting experience. We will have no hesitation in recommending Cahill Renewables.
Customer in Kent Posted on 25/01/2026 , work completed 15/01/2026
Solar panels installation
Customer Service
Quality
Value
Cahill provided excellent customer experience and customer service with my installation of solar panels system. I would highly recommend them.
Customer in Milton Keynes Posted on 09/01/2026 , work completed 07/01/2026
First Class Installation Process
Customer Service
Quality
Value
From the initial planning stage, then the survey, on to the installation, Cahill Renewables reflected the best of British solar installers. Their communication with myself, the customer, was excellent. The actual installation was not rushed. Attention to detail was applied at all times and the work was conducted in a very friendly but professional way. I believe that the full service that was given and the results that followed could only be equalled but not surpassed.
Customer in Hampshire Posted on 03/12/2025 , work completed 02/12/2025