Had them installed march 2022, local authority scheme,cost 8.5k,12 panels,2 batteries. We're in the SE UK. We didn't get a say in installers, obviously council together with "solar Together", use the cheapest quote. They were arseholes. 2 bedroom detached bungalow,cook with electricity, emersion heater, mostly since march when clocks went forward,our own electricity is covered, no gas required,we just pay the SDC. We were already with octopus,and the 15p export tariff is the best ATM,we are getting roughly £80 export.