2GIG GC3 restore after extended power outage?

Assuming an extended AC power outage drains the onboard battery backup, will the GC3 panel restart normally, with all sensors and programs intact? I’m thinking about a Hurricane Florence type scenario.
If it something gets lost/erased/reset, how do i restore the panel to service?

thanks,
AllenT

Barring actual electrical surges/damage, a power outage does not erase any settings, and the panel will boot up in the exact same state it was in when it lost power.