[pjc50]

> scale indefinitely with liquid tank size...that the plate surface area also matters?)

For flow batteries, the plate area controls the charge/discharge rate and the tank size controls the capacity. In theory you can scale the capacity as far as you can build tanks; I don't know whether there are practical considerations of "self-discharge" or electrolyte degradation.

[KennyBlanken]

Not for ESS batteries.

Please do your homework before you speak.