Bringing this from the Space thread where I was chatting with @Albert_Thurgood. Seems a better fit here.
Yeah, battery cycling is a real issue. But there are commercial ways around that.
I can see people signing up to a commercial agreement where they were paid for access to the battery instead of just the energy exported.
Instead of companies building new grid scale batteries, they would pay 100,000 car owners for access to their battery. The payment would cover the costs of the early battery replacement, but would avoid most of the capital costs of designing and building a large industrial asset.
Grid scale batteries have the same cycle issue as car batteries. They still make money and deal with replacing cells, so there’s no reason a distributed battery couldn’t do the same. If we don’t tap into the cars (and other behind the meter batteries), we are leaving half the storage capacity unused. The trick is to cover the costs to the owner of getting their battery replaced early.