The brown area is us buying electricity from the grid during off peak time, at 8p/kWhr. This tops up the 13kW battery and runs a hot water cycle via the heat pump. We might also charge a car during this time. 1/
The brown area is us buying electricity from the grid during off peak time, at 8p/kWhr. This tops up the 13kW battery and runs a hot water cycle via the heat pump. We might also charge a car during this time. 1/