So today, after a couple days of rain after commissioning, I finally had (2) fully charged powerwalls. I decided to mimic a power outage and flipped the main breaker. Had a momentary loss of power (maybe a second) and then was on battery backup. After a minute I turned the breaker back on. I was expecting grid power to be “restored” fairly instantaneously, but it showed running from battery/grid outage for roughly another (5) minutes. Is this normal? Is the system waiting to make sure line power is “stable” before reconnecting, or does it only look to reconnect every so often?