Is using your car's battery for grid storage a good idea? You're shortening its life, which you've paid a premium for to put in a mobile format. I suppose you

Is using your car's battery for grid storage a good idea? You're shortening its life, which you've paid a premium for to put in a mobile format. I suppose you'd have to figure out how much a charge/discharge cycle is worth and that will tell you how much you'd need to be paid to make it economic.