Comment And the other problem with batteries... (Score 1) 334
For the grid there are reserve requirements (i.e. demand + 10%) in case a generator goes down and they need to pick up the slack.
Batteries are being integrated, but its slow. the ISOs/RTOs need to figure out how to incorporate them into their market systems (and how to pay people, etc.)
Accurate metering of the energy being put back into the grid, Accurate metering of the actual consumption from the grid, etc.. None of this is "trivial"