no. installed pre-mcs/rhi, although it is inside the qualifying period, but the boiler (because its a funny pellet/log hybrid) hasnt been submitted for MCS certification and the solar kit isnt MCS certified either. The additional cost of having an MCS installer completely wiped out the economic benefit of the MCS payments. So I DIY’d and will get a faster payback even without the RHI.
The £10k boiler cost was around 7-8k more than a new oil installation (mine was a “new build” so I would have otherwise have had to pay for an oil boiler, tank, installation, boiler room pipework, pumps etc anyway) but since my fuel costs are around £300-400 a year instead of the equivalent for oil of around £1,500 then my payback will probably look like about 7-10yrs excluding oil inflation.
The solar cost £2k and saves around the equivalent of 4.5 x 30days @ 20kWh a year of energy = 2,700kWh during summer, and probably another 500kWh+ contribution the rest of the year.
However my alt fuel in summer is still logs so while it doesnt save me any money as such, it does save me the need to light the furnace every few days to make hot water. If it were a replacement for oil, it would save me around £250 a year. SO again, a 7-10yr payback excluding oil inflation.