END TIMES PING LIST PING
THis is the system I’ve been trying to cobble pennys together to get.
I think this is worth prayerful consideration, for sure.
Remember—to put it in a Faraday cage . . . and if possible, have a backup duplication of at least major components.
The Faraday cage will lessen umph because of decreasing some sunlight but should protect it from EMP if designed well.
Who can tell us the size of the wire mesh needed to protect from EMP?
Q there are a number of sites out there that go into the mesh size for a faraday cage. IIRC it needs to be window screen sized. Lots of debate out there as to what effect to expect from a solar CME or a nuke EMP. Pick a theory and go with it.
There's no one answer on that, unfortunately.
The most powerful pulse from an EMP blast in the ionosphere, the E3 pulse, has a wavelength so long that only devices connected to the mains (wall socket) will be affected. The E1 and E2 pulses have lengths (and therefore frequencies) that depend on the design of the bomb, and the blast's distance from the active Compton effect layer. The altitude of the various layers changes based on the time of day (which is why you can hear distant AM stations at night, but not during the day).
I'd be pretty comfortable with copper or brass mesh with 10 wires or more to the inch.
You have to shield the solar panel's power cable, too, or it becomes an antenna. GROUND IT AT ONLY ONE END, not both.
A good performance estimation equation is:
(all in meters)
Shielding = 20*log((wavelength/2)/(mesh dimension)
wavelength = 0.3 (for 1000MHz, typical HEMP pulse)
for .1 inch (.000254 m)
For this small dimension mesh (.1 inch), you get:
35dB at 1000MHz
55dB at 100MHz
75dB at 10MHz
(lower than that, you are not shielding against magnetic fields as effectively so you should not count on this equation)
Even .1 inch mesh is inadequate for a typical EMP pulse which requires up to 80dB of shielding.
So the mesh faraday cage is not likely to be an effective sole means of protection - at best you count on it being “better than nothing”
This performance figure assumes a perfect mesh cage - which is difficult to attain with home-brew materials and methods. I would subtract 10-20dB for imperfections in implementation of design.