RHI tariffs for Ground Source Energy have increased dramatically
The RHI tariff for GSHPs started at 3.2 pence/kWhr in 2011.
It has since been increased to 9.09 pence/kWhr.
RHI for ASHPs was introduced at 2.5 pence/kWhr in 2014.
The remaining RHI tariffs are broadly unchanged
(apart from inflation adjustments each April).