[RE-wrenches] Ferrites for EMP/solar flare protection?

Mon Feb 7 22:36:51 EST 2022

I am not seeing how ferrites can stop EMP. The frequencies involved will affect diode junction level electronics.

Ferrites may lessen the induced surge picked up by the conductors between the array and the inverter/charge controller, but unless the electronics are hardened too, I don’t believe it.

Glenn

From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Maverick Brown
Sent: Monday, February 07, 2022 12:52 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Ferrites for EMP/solar flare protection?

Hans,

Here is a split ferrite kit (various sizes) from Mouser.com <http://Mouser.com> :

https://www.mouser.com/ProductDetail/Laird-Performance-Materials/K-404-EMI-A-LG?qs=GedFDFLaBXEg9IWU3Su8DQ%3D%3D <https://www.mouser.com/ProductDetail/Laird-Performance-Materials/K-404-EMI-A-LG?qs=GedFDFLaBXEg9IWU3Su8DQ==> 

Sol-Ark makes an EMP hardened inverter and that kit comes with ferrite cores for each solar panel. Both normal and EMP version come with ferrite cores for the battery cables, Schnieder 600V solar charge controllers comes with cores and older inverters also came with cores. so, it seems cores are good even for regular systems, such as to combat back EMF from larger motor loads / inductive loads.

So, the bottom line is that is helpful to block line surges by using ferrite cores to suppress voltage spikes & surges. And like lightning, you can do the best that you can do and too many parameters can guarantee anything.

I going to investigate further and make kits for my own customers.

Good luck!

Maverick

Maverick Brown
Off-Grid Solar Commander since 2006
Maverick Solar Enterprises, Inc.

 • Solar Commander Remote Power

 • SunFlow Systems Cathodic Protection 
maverick at mavericksolar.com <mailto:maverick at mavericksolar.com> 
512-460-9825

On Feb 7, 2022, at 11:24 AM, Hans Frederickson <Hans at fredelectric.com <mailto:Hans at fredelectric.com> > wrote:

Wrenches,

One of our grid-tied solar + storage customers with a SolarEdge StorEdge / LG Chem RESU10H system found some information online about protecting solar systems from an EMP:

 <https://disasterpreparer.com/product/solar-ferrite-bundle/> Solar Power Ferrite Bundle – Practical Disaster Preparedness for the Family (disasterpreparer.com)

Our customer is asking for our recommendation on this. We have used Ferrites for filtering out inverter noise but I’m not familiar with the idea of using them for protection from EMPs. Does anyone on this group specify or recommend these sorts of products for that purpose? Is there any historical evidence of EMPs being a threat to solar systems?

Thanks,

-Hans

Hans Frederickson, President

<image001.png>

 <http://cascadiasolar.com/> www.cascadiasolar.com »

_______________________________________________
List sponsored by Redwood Alliance

Pay optional member dues here:  <http://re-wrenches.org/> http://re-wrenches.org

List Address:  <mailto:RE-wrenches at lists.re-wrenches.org> RE-wrenches at lists.re-wrenches.org

Change listserver email address & settings:
 <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

There are two list archives for searching. When one doesn't work, try the other:
 <https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
 <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
 <http://www.re-wrenches.org/etiquette.htm> http://www.re-wrenches.org/etiquette.htm

Check out or update participant bios:
 <http://www.members.re-wrenches.org/> http://www.members.re-wrenches.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20220207/3067a205/attachment.htm>