I’m in the UK and have a pv system and Powerwall 2 . Also have economy 7 electric supply. I never export any excess generation as I have a mechanism that uses any spare to heat water for my UFH system. Obviously in winter I generate much smaller amounts. In order to efficiently “time shift” the cost of electricity I want the battery to be fully charged by 7am every morning. I can then use during day and be topped up at night. How do I get the battery to fully charge overnight?
Currently it charges to varying levels such as 25%, 30%, 70%_ all over the shop and no- one seems to know what the “algorithm “ looks at!