A "no Electrician required" device that plugs into your wall and back-feeds power is a HUGE safety issue, and a HUGE no-no.
Half the problem with home-generation is a cutoff/sync device that synchronizes the frequency of your local generation with the grid, and kills power going back into the grid from your home generator when there is an outage, so line workers can do their jobs safely. And unless there is a more expensive/complicated device that can 'smear' the frequencys between the two systems slowly so they match after a disconnect/reconnect, most of these systems will shutdown local generation if there is no reference frequency from the main power feed.
Why is this a safety issue? Home batteries are capable of detecting outages and ensuring that they don’t back-feed after an outage. Pila is no different.
If you backfeed during an outage, and then the grid reconnects, you're fighting the grid. If you backfeed during an outage and an electrician is trying to fix lines near you, you can hurt them.
Why does the OP say it "disconnects in 20 ms of detecting an outage"? If it's a UPS, it doesn't need to disconnect - It's just no longer fed by the grid. If it's back-feeding, the point would be to _start_ the connection when you detect an outage. But backfeeding is an extremely bad idea.
I was commenting on the parent's mention of suspecting it could be a UPS that feeds power back into the house. It's one of those things that's super easy to DIY, or even do accidentally, but is super dangerous, so I didn't want anyone else thinking why not. I don't think you could even get a UL certification for such a device.
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.
Half the problem with home-generation is a cutoff/sync device that synchronizes the frequency of your local generation with the grid, and kills power going back into the grid from your home generator when there is an outage, so line workers can do their jobs safely. And unless there is a more expensive/complicated device that can 'smear' the frequencys between the two systems slowly so they match after a disconnect/reconnect, most of these systems will shutdown local generation if there is no reference frequency from the main power feed.