The OP described it as plugging into mains outlet and then, in the event of an outage, feeding power back into that mains circuit to power every outlet on the circuit.
Did I misunderstand?
Did I misunderstand?
This is why you have lockout devices on breaker boxes, if you’re going to have an emergency generator that plugs into the same box.
Or you have automatic transfer switches that handle cutting off your feed back to the power company, before turning on any battery or power generation equipment at your site.
Take a step back and look at how it’s constructed, and what the inputs and outputs actually are. It is clear that it’s just a pretty UPS with a weird proprietary wireless communications system, and should be compared against the likes of APC and CyberPower.