Renewable Heat Incentive (RHI) for Solar Thermal

The Renewable Heat Incentive (RHI) is another Department for Energy and Climate Change (DECC) initiative which allows those who choose to install renewable heat sources in their home or business property to receive payment (paid quarterly) per kilowatt hour (kWh) of heat produced and used.

The RHI has two phases:

  • Phase 1 - RHI payments for heat produced in non-domestic installations (i.e. those in businesses, industry and the public sector). This phase is currently in effect and is open for applications.
  • Phase 2 - payments for heat produced by domestic installations.


The current tariff for the non-domestic RHI is as follows:

Solar thermal collectors >200kWth
Tariff per kWh 8.9p


The NEW domestic RHI is as follows:

Solar thermal collectors >200kWth
Tariff per kWh At least 19.2p/kWh


The non-domestic tariff is guaranteed or ‘locked in’ for a period of 7 years. The domestic RHI tariff is also run on this same model.

In order to be eligible for RHI tariff payments, the property must satisfy the above conditions. Moreover, the installation must be carried out by a Microgeneration Certification Scheme (MCS) accredited installer, who will also install a generation meter.

For more information on non-domestic RHI and the full conditions of eligibility, see the energy regulator Ofgem’s website.


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