> And another obvious use for a grid battery is to take advantage of that same demand pricing by buying power when it's cheap and selling when it's not. Far as

> And another obvious use for a grid battery is to take advantage of that same demand pricing by buying power when it's cheap and selling when it's not. Far as I get the actual price of electricity varies a lot, so there potentially a lot of arbitrage to exploit. There's a dozen ways to store energy with varying amount of round trip efficiency, capital costs, and operating costs. Some set of technologies will win out in that space. I suspect one reason these technologies aren't well developed is because historically the cheapest is baseload power produced by coal and nuke plants. Economically the price is actually subsidized. So utilities did not want knuckleheads buying their cheap power at night and selling it during the day.