@wscholermann @SituationCake battery technology is improving constantly. I have a 10yo ev, bought secondhand and got the battery upgraded, the new battery is double the range than the old one was when new, and the old battery was still very serviceable and can be used for an off grid home battery system, but new batteries if the size of the old one are getting so cheap now it's probably cheaper to connect a new battery to an off grid pv system.