Submitted by patbuoncristiani on October 27, 2018
I have a Powerwall 2 and reserve 15% in case of a blackout. My hot water system will suck the battery dry very quickly if I don't switch it off when there is an outage. How can I know when there is an electricity outage, given that the switch to the battery is so effective that it doesn't cause lights etc to go out? How will I know?