Comment by bluGill

I'm not trying to make money here though. I'm trying to recoup some of my costs for a home backup for when the grid fails. My house automatically switches to a backup generator when the power goes out, but it is from the 1970s and wearing out, a battery system that can recoup some of the costs by arbitrage is useful even if it loses money.

While the power doesn't go out often, it is a big deal when it happens and so a backup is useful. I'm still fixing the damage from the last one - the sump pumps not running for an hour in a rain storm is expensive. Fortunately it wasn't a long outage, much longer and the fridge/freezer would be a problem. In cold weather the furnace is important to keep running. There are other essential things as well that my house cannot survive without. Beyond that I want my computers to keep running if possible.