Leaders in Solar & Heat Pump Technology

Cut Energy Bills with the UK’s #1 Solar & Heat Pump Installer | Expert Renewable Energy Solutions

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A Spotless Reputation

A sterling reputation, praised through five-star reviews across various platforms.

11+ Years Installing Solar

More than 11 years in the industry, boasting over a decade of accomplished renewable energy installations.

No Sales Visits

No pushy sales visits—just expert advice, so you can make a decision in your own time.

Cahill Renewables - A local solution to global problems

Offering Solar PV, Battery Storage, Air Source Heat Pumps, Air Conditioning and Underfloor Heating

Step into a greener future with Cahill Renewables. A family-run company with over 10 years of unmatched service. Our solar battery storage installers , you not only enhance your energy independence but also contribute to a sustainable future. Cahill Renewables’ friendly team of the best solar panel installers and solar battery installers have a depth of knowledge and wealth of experience, always ensuring the right long term solution is fitted to your home.

Some Of Our Recent Craftsmanship

No-nonsense renewable energy solutions, tailored to you. Solar panel and heat pump installations have never been so popular.

We design a solution to your needs, all at competitive pricing. Customers love our hands-off approach, putting you in control of your family’s energy security, reducing costs and helping the environment.

Cahill Renewables’ friendly team of renewable energy consultants and installers have a depth of knowledge and wealth of experience, always ensuring the right long term solution is fitted to your home.

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Your Local, Family Run

Solar Panel and Heat Pump Specialists

From either our head office in Colchester or satellite office in Kent, Cahill Renewables works with clients in the South East and beyond. Whether you are interested in reducing your utility costs, want to enhance the efficiency of your home, or wish to reduce your reliance on the grid, we’re at your disposal throughout the journey.

The heat pumps, underfloor heating, air conditioning, solar panels, inverters, and batteries we supply are of exceptional quality and engineered to the highest performance standards, reflecting our commitment to excellence in solar panel installation services. Our focus is to maximise your energy generation or saving, ensuring long-term advantages that include reduced utility costs and potential passive income from surplus power created by your solar energy system installation.

If you’re looking for a heat pump installer near me, or a solar installer near me, you’ve found us. To find out more and get a competitive quote tailored to your specific needs, press the button below. We’re here to assist you in making the most informed decisions about your energy solutions.

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      EXCELLENT  
   Based on 184 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Ben Bennett 
 August 1, 2026
 
 
 Trustindex verifies that the original source of the review is Google. I had Brandon from Cahill install my solar today Very professional clean and tidy would highly recommend Cahill renewable company.
  
 
      Posted on Google  
   
   Andy Sumpner 
 July 31, 2026
 
 
 Trustindex verifies that the original source of the review is Google. An excelent service and the crew were fantastic. Great to see the apprentice Ryan doing so well. 5⭐️
  
 
      Posted on Google  
   
   Lynda haycock 
 July 24, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Excellent
  
 
      Posted on Google  
   
   Charlotte Scott 
 July 20, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Jude fitted an additional battery and backup gateway to my solar panels. Such a great job; polite, efficient, explained everything very thoroughly.
  
 
      Posted on Google  
   
   Dave Powter 
 July 18, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Havebury organised Cahill Renewables to supply and fit solar panels to our property. The whole process has gone extremely smoothly. From the original survey team, the appointment booking staff and the installation guys and electricians have all fulfilled there roles, no broken appointments or promises.
Complete breath of fresh air to have a team of people all working together and for the customer. Jude the electrician is especially good and a total asset to the company!
Thankyou for a easy, professional and on time job.
  
 
      Posted on Google  
   
   Rachael Holohan 
 July 18, 2026
 
 
 Trustindex verifies that the original source of the review is Google. We have had Jude here all day, doing the electrics for our Solar Panels, courtesy of Havebury Housing.  What a credit to your company he is.  For a young Lad, he has an amazing work ethic.  He is tidy and conscientious.  Happy to chat, but always working.  We couldn't fault him at all.  My little Staffy Ripley, will miss him, he was happy to let her follow him all day. Thank you Jude, you truly are a lovely hard working young man. Well done.  For once, the whole process was painless.  What a great company and workforce. Thank you.😁😁
  
 
      Posted on Google  
   
   Barry Gosling 
 July 16, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Jude who installed the panels was 1st class, friendly, prompt & full of knowledge, nothing was too much for the amount of work he had to do, everything was installed neatly & after he left you wouldn't have known he been here, took all the boxes away & any other bits & peices that weren't used.
Highly recommend this company.
  
 
      Posted on Google  
   
   Andrew W 
 July 10, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Nice respectful drivers parking in disabled parking!
  
 
      Posted on Google  
   
   Graham Rock 
 July 8, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Another stellar installation from Cahill for us.
  
 
      Posted on Google  
   
   Amy Stubbins 
 June 25, 2026
 
 
 Trustindex verifies that the original source of the review is Google. Was anxious about having a heat pump installed because of all the changes needed in our house but they made it so easy and I barely noticed the work being done. Cyn did an incredible job! Really pleased with how everything went.