Graham Haine and his team at Sunstone Energy did a first-class job in designing, procuring and installing an Ecodan 85 Air Source Heat Pump with associated hardware, PV solar panels on feed-in tariff, underfloor heating and a Contura wood burner for my recently built eco-home. The system has worked flawlessly for 5 years and Sunstone Energy make annual service visits. Knowlegable, reliable and friendly, I thoroughly recommend them as eco-experts who know what they are doing, backed up by an extensive list of successful projects as proof. An absolute pleasure to work with.

We used Sunstone Energy  for our home installations: these included a ground source heat pump, solar thermal panels, solar PV's, and heat recovery system. Their office staff and engineers are friendly and efficient and we wouldn't hesitate to recommend Sunstone Energy for all your property eco requirements. Both Graham and Nicola Haine are professional and extremely knowledgeable.

I would like to congratulate you on always offering an excellent service. Sunstone Energy installed our ground source heat pump in 2012 and Graham was extremely helpful in explaining all of the advantages. It has been a great success & the Sunstone team have been amazing and always very prompt in sorting out any problems and 10 years on we still have an excellent sustainable hot water and heating system. Thank you to you all, it's great to know that you are there for support at any time even 10 years on.

Sunstone Energy recently designed and installed a renewable heating system at no 61-65 Charlotte Street, London, a high-end residential development site. We found them very professional throughout the whole process and looking forward to working with them again in the future.