Letter Re: EMP Protection for Photovoltaics

Mr Rawles,
I have been reading survivalblog.com for about eight months now and have been considering trying to go off the grid so to speak. I have been reading many, many very helpful and interesting articles about “how to” setup and or make your own solar panel system. There is one question that I hope that you can field to your contributors of this subject. How you you protect your solar panels and system from a HEMP should one occur? I have not found info on how to protect against this kind of attack. It does not seem practical if you mount a system on your roof to take it down and shield it in a Faraday cage. There would just not be enough time for that exercise to happen nor would anyone get any “heads up” type of notice. Thanks, – Greg in Salt Lake City

JWR Replies: The silicon panels themselves as well as their blocking diodes are inherently fairly “hard” against EMP.  It is the charge controller and the inverter in your system that are most at risk.   Buy spares and store them in static protective bags inside Faraday boxes/cans.