Mr H. of Down Thomas near Plymouth had an oil boiler up to the 13th September 2013. NGPS supplied and installed a market leading Danfoss AQ air source heat pump and a nine panel Phono PV system with the market leading Enphase M215 micro inverters. The oil boiler and storage tank were removed.
We recently got this email from him:
Hi Nick, I thought you might be interested in the following figures, which are taken from a year’s worth of readings on the electricity meters (mains input and solar panel generation) and the Heat Pump. Note that I have no other power supplies to the house.
Solar Panel Generation 2819 kwh
Imported from Mains 3817 kwh
Heat Pump meter (output) 7490 kwh
This means that my nett power consumption for the house, for all purposes (cooking, fridge freezer, central heating, hot water, lights, TV, Wifi etc), is 998 kwh over the year.
With the rates I am paying for electricity from EDF and receiving for generating electricity from the solar panels, this works out at an expenditure of about £70 for the year!