Where are most US based inverters manufactured? If someone is off grid or hybrid, what is the concern, outside of power-feedback into the grid? This seems more like an admission that going off-grid or hybrid is becoming attractive enough to matter. It's already not up to code to connect a non-UL listed inverter to the grid.

Real, actual concerns: -Lack of security -Password defaults left on device during setup -Aluminum transformers in inverters don't last more than 4-5 years at rated wattage