[danans]

> Sure do! They definitely need all both of those things!

When a generation provider bids supply onto the grid, it doesn't tell the operator what the maximum storage capacity of its equipment is, it tells the ISO how much power it can output for a given time frame (or alternatively how much energy it can deliver during a timeframe).

That is different that the total energy storage capacity of the battery itself, which is what I think you asked for.

The grid operator usually pays more attention to the former when it comes to day to day grid stabilization, and especially so for batteries, because batteries today don't do long term energy storage.