Microgeneration Certification Scheme (MCS)

MCS refers to the Microgeneration Certification Scheme. It is a requirement of the Domestic RHI scheme that all heating systems are certified by MCS. MCS is an internationally recognised quality assurance scheme supported by the Department for Business, Energy & Industrial Strategy (BEIS), formerly known as the Department of Energy and Climate Change (DECC). MCS certifies both products and installation companies to help ensure that Microgeneration products are installed to a high standard.

You will need to provide an MCS certificate number as part of your application, to confirm that your heating system has been installed in line with the MCS installation standards (see below). Applicants who do not have an MCS certificate will not be eligible for the Domestic RHI. This is because MCS is currently the only certification body approved by BEIS for the Domestic RHI scheme.

The MCS website provides lists of certified installers and products.

Any other certification body would need to be accredited under EN 45011 or EN ISO/IEC 17065:2012 and be considered equivalent to MCS in order for Ofgem/BEIS to approve them as a certification body for the scheme.

MCS Standards

Heating systems installed on or after scheme launch will need to meet the following MCS installation standards* (the MCS certificate for your heating system will be used as proof that these standards have been met):

  • where the plant is a biomass plant, version 4.0 of the document entitled “Microgeneration Installation Standard: MIS 3004 requirements for contractors undertaking the supply, design, installation, set to work, commissioning and handover of solid biofuel heating systems” published on 16th December 2013;
  • where the plant is a heat pump, version 4.0 of the document entitled “Microgeneration Installation Standard: MIS 3005 requirements for contractors undertaking the supply, design, installation, set to work, commissioning and handover of microgeneration heat pump systems” published on 16th December 2013; or
  • where the plant is a solar thermal plant, version 4.0 of the document entitled “Microgeneration Installation Standard: MIS 3001 requirements for contractors undertaking the supply, design, installation, set to work, commissioning and handover of solar heating microgeneration systems” published on 16th December 2013;

If your heating system was installed and first commissioned before this date, it will need to meet the MCS standards that applied at the time of installation.

*MCS have issued the new installation standards MIS 3001 and MIS 3005. If your renewable technology is installed using one of these standards it will not affect your eligibility to the scheme. This is because The Domestic Renewable Heat Incentive Scheme (Amendment) Regulations 2015 list these standards.

MCS Compliance Certificate

MCS have recently introduced Compliance Certificates for heat generating technologies. Compliance Certificates are effectively checklists which confirm that your heating system was installed according to MCS standards and records key information about the heating system. Your installer should ensure that you are provided with a copy of your Compliance Certificate.

We will not require you to submit a copy of your Compliance Certificate as we will be able to access the relevant information via MCS.