The milestone means a total of 827,000MWh of renewable heat is being generated, saving an estimated 3.4 million tonnes of carbon dioxide over its 20-year operating period.
Managed by Ofgem E-Serve, domestic RHI was established in 2014 and aims to encourage households to make use of renewable heat technologies including biomass boilers, ground and air-source heat pumps and solar thermal. The scheme pays participants with accredited systems a quarterly tariff over seven years based on their renewable heat output.
Ofgem E-Serve associate director of the RHI Gareth John said: “Since the launch of the Domestic RHI programme we’ve worked hard to deliver government policy through efficient administration.
“We aim to provide clear guidance to homeowners and installers to make the process of applying for and complying with the Domestic RHI as straightforward as possible.”
Earlier this year the Department for Energy and Climate Change (Decc) revealed that 59 per cent of new applications in the first 12 months of the RHI scheme were for biomass boilers and that 42 percent of successful applicants would not have replaced their heating system at all without the RHI.