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Ensuring peace of mind and best practice with our industry accreditations.


We take our commitment to delivering quality renewable solutions seriously. Working to the highest industry standards, we are proudly MCS certified, HEIS consumer code members, Trustmark approved and NICEIC approved contractors.  


R.E.S are Microgeneration Certification Scheme (MCS) accredited for both design and installation for heat pumps and Solar PV. MCS certifies low-carbon products and installations used to produce electricity and heat from renewable sources. Membership of MCS demonstrates adherence to recognised industry standards; highlighting quality, competency, and compliance.



R.E.S are members of HIES. HIES is a consumer protection organisation covering the installation of renewable energy and home energy efficiency products. Using a HIES installer gives homeowners trust, confidence and peace of mind, before, during and after installations.



R.E.S are a TrustMark approved company. TrustMark are the only UK Government-Endorsed Quality Scheme for home improvements carried out in and around the home. TrustMark Registered Businesses are vetted and monitored to ensure they meet required standards in technical competence, customer service and trading practices, so homeowners can be sure they’re making the right choice.



R.E.S are a NICEIC approved contractor. NICEIC is the industry gold standard, supporting safe installation and maintenance in the electrical and wider building services sector.


Find a merchant

We’ve partnered with plumbing and heating merchants, builders merchants, and electrical wholesalers throughout the UK. If you can’t find someone in your area, please give us a call.