He should have the meters to track down your problem.
I guess it is possible the strike took out your power distribution panel.
Not likely, but possiible.
The "Genera" labeled breaker could be a pre-wired circuit to a place in your rig where a generator could be installed. Maybe it was tripped before (ie OFF) and you never noticed it before. With all the hair pulling and running around wildly insane, you are looking for stuff.
ANYTHING to get it all fixed.
Relax and let "Sparky" fix your problem.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW