That's the issue with my commercial RHI customers... the hoops have got harder and trying to find someone compliant to service them is an issue. We have about 10 Grant Spira wood pellet boilers that we have sadly decided to refuse to service as ever visit results in a £500-£1000 billl due to the cost of parts. Might be good money but feels immoral and I want no part of it. We are not Hetas so can't service under RHI rules.. despite being trained on the bloody things.Oil is about 80-90p a litre so 8-9p / kWh.
Rhi and biomass can be good, we are getting around 8p a kWh net income from rhi. We then sell the heat for another 7-8p and don’t use maybe 3000 litre of oil to heat the farm house.
That said OFGEM are now deliberately trying to shut us all down by making the hoops harder to jump though, I think.