I think it is talking about power capacity, not the discharge rate.

ishtanbul · on Aug 19, 2023

I work in energy storage. This is not totally wrong, its just omitting the duration. 100MW only describes the rate at which the battery can discharge. The duration would be expressed in MWhours (mwh) so a 100MW/200MWh system would be able to discharge its full tank in 2 hours. You need to know the MWh to know how physically large the system is.

kwk1 · on Aug 19, 2023

A watt has dimensions of energy over time. It cannot be used to express a measure of energy unless you multiply it by time, as in a watt-hour.