Safety mechanism for power outage use of solar.

I would like to see your construct of a Faraday Cage. Those are about the
same as the shielded rooms we used at work. It that case a double shield
was used. Here 2 sheds are metal (Morton) with multiple grounds (no bottom
cover), house has a metal roof with multiple ground cables running down. Not
super secure, the idea was to protect against lightning.

Bruce Roe

I've seen a few plans for making faraday cages. The one I like the most is a metal garbage can and lid where you start with putting an FM radio in and if it still plays when you close the lid, you have to start looking for leaks via a lantern inside and using metal conducting tape everywhere the light gets out. Continue until the FM radio no longer plays. Then put a cell phone in and see if you receive text or calls. Then line the whole thing with cardboard and stack your sensitive items within. Will it work? Wait for an EMP and let me know. I wonder how the military hardens their equipment.

I would not use a cell phone. These adjust their rf power to compensate
for loss of signal. FM has the problem, the volume has nothing to do
with received signal strength. Unlike AM, it either works or it does not.

It would be good to know what the frequency spectrum of the pulse
is, and which parts are most likely to cause damage. Then concentrate
on them. Bruce Roe