"Base Power charges customers $695 to install a single battery, $19 per month, and 13.1 cents per kilowatt-hour for electricity, which is about the going rate in the region. Base Power, which owns the battery, sells stored electricity back to the grid during periods of high demand."

As Base, and not the customers, own the batteries, it seems to me these customers are buying insurance against grid downtime as much as anything else.

Base Power has big ambitions, but isn't there a flaw in their plans? Solar Panels.

They're getting cheaper and cheaper & linking them to your own batteries means that you can drop the '13.1 cents per kilowatt-hour for electricity' & '$19 per month' part of Base's deal.

Base Power raises another $1B to save the grid using backyard batteries