Right -- as long as it's just feeding power to the appliance, via a downstream outlet, like a UPS typically does. You can't send power back through the outlet the Pila is attached to, but you can send power to anything connected to it downstream.
I think it's a neat product, a UPS that doesn't look like a computer peripheral, that has large enough capacity to be useful for important appliances like fridges, that can be integrated into common spaces, and with some kind of management utility that can ensure the battery health is monitored.
