Loose power?? Not very likely. Been off the grid for about 20 years now. We have 3 independent solar systems, each capable of meeting our needs. One that supplies our 5w trailer, one on our truck camper and a spare I occasionally use for special projects.
The spare system is stored in a 33' long aluminum trailer that provides pretty good farady shielding. Should survive all but the most severe EMP event.
Guess something could kill 'em all, but then I would probably have more serious problems that loss of power.
Nomad.
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...........From Nomad.........Been "on the road" since '97