In Part 2, we talked about heating hot water with electricity with a goal of supplying 100% of that electricity with solar panels.R
emember, we aren’t trying to cover 100% of instantaneous electricity use with solar PV, just 100% of the average electricity use for the entire year in a grid-connected system without batteries. For example, if you use 11,000kWh of electricity during the entire year, your PV system will need to generate at least that much energy for the year (and hopefully some extra to offset grid losses). We’ll talk about that more in Part 5.