Interesting! But 50kWh seems pretty small for (macro-) grid applications. How big are these units? Seems like most grid installations would want on the order of hundreds (~10MWh) to a few thousand (~100MWh) of these.
The focus is on microgrids, but they're modular and can be installed below grade so you can add as many as needed. Approximately 2m diameter by 1m tall.
We're still working out costing, but it might even make sense for residential use to take advantage of time-of-use rates or energy arbitrage. Other applications are industrial processes that require high power for short periods.
Cool! I'll definitely be following your progress with interest :)
Hopefully constructive feedback: I would put that residential thing further down on your list. I think that stuff tends to be too complicated unless / until you can aggregate a lot of loads (eg. I think Tesla only recently recently started doing this stuff residentially. Probably awhile before you reach their scale...)
Or do you plan to focus more on microgrids?