<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hans,<div class=""><br class=""></div><div class="">Here is a split ferrite kit (various sizes) from <a href="http://Mouser.com" class="">Mouser.com</a>:</div><div class=""><br class=""></div><div class=""><a href="https://www.mouser.com/ProductDetail/Laird-Performance-Materials/K-404-EMI-A-LG?qs=GedFDFLaBXEg9IWU3Su8DQ==" class="">https://www.mouser.com/ProductDetail/Laird-Performance-Materials/K-404-EMI-A-LG?qs=GedFDFLaBXEg9IWU3Su8DQ%3D%3D</a></div><div class=""><br class=""></div><div class="">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.</div><div class=""><br class=""></div><div class="">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.</div><div class=""><br class=""></div><div class="">I going to investigate further and make kits for my own customers.</div><div class=""><br class=""></div><div class="">Good luck!</div><div class=""><br class=""></div><div class="">Maverick</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""><div class="">
<meta charset="UTF-8" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Maverick Brown<br class="">Off-Grid Solar Commander since 2006<br class=""><b class="">Maverick Solar Enterprises, Inc.</b></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><b class=""> \u2022 Solar Commander Remote Power</b></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><b class=""> \u2022 SunFlow Systems Cathodic Protection <br class=""></b><a href="mailto:maverick@mavericksolar.com" class="">maverick@mavericksolar.com</a><br class="">512-460-9825<br class=""></div></div>
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<div><br class=""><blockquote type="cite" class=""><div class="">On Feb 7, 2022, at 11:24 AM, Hans Frederickson <<a href="mailto:Hans@fredelectric.com" class="">Hans@fredelectric.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Wrenches,<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">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:<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><a href="https://disasterpreparer.com/product/solar-ferrite-bundle/" style="color: rgb(5, 99, 193); text-decoration: underline;" class="">Solar Power Ferrite Bundle \u2013 Practical Disaster Preparedness for the Family (disasterpreparer.com)</a><o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Our customer is asking for our recommendation on this. We have used Ferrites for filtering out inverter noise but I\u2019m 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?<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">Thanks,<o:p class=""></o:p></div><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class="">-Hans<o:p class=""></o:p></div><p class="MsoNormal" style="margin: 0in 0in 9.75pt; font-size: 11pt; font-family: Calibri, sans-serif;"><b class=""><span style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(68, 68, 68);" class="">Hans Frederickson,</span></b><span style="font-size: 10pt; font-family: Arial, sans-serif; color: rgb(85, 85, 85);" class=""><span class="Apple-converted-space"> </span>President<o:p class=""></o:p></span></p><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 9pt; font-family: Arial, sans-serif; color: rgb(85, 85, 85);" class=""><span id="cid:image001.png@01D81C04.825A6A00"><image001.png></span><o:p class=""></o:p></span></div><p class="MsoNormal" style="margin: 9.75pt 0in 0in; font-size: 11pt; font-family: Calibri, sans-serif;"><a href="http://cascadiasolar.com/" target="_blank" style="color: rgb(5, 99, 193); text-decoration: underline;" class=""><b class=""><span style="font-size: 9pt; font-family: Arial, sans-serif; color: rgb(45, 139, 204);" class="">www.cascadiasolar.com »</span></b></a><span style="font-size: 9pt; font-family: Arial, sans-serif; color: rgb(85, 85, 85);" class=""><o:p class=""></o:p></span></p><div style="margin: 0in; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><o:p class=""> </o:p></div></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">List sponsored by Redwood Alliance</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; 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When one doesn't work, try the other:</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" style="color: rgb(5, 99, 193); text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; 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white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">List rules & etiquette:</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="http://www.re-wrenches.org/etiquette.htm" style="color: rgb(5, 99, 193); text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">http://www.re-wrenches.org/etiquette.htm</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Check out or update participant bios:</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="http://www.members.re-wrenches.org/" style="color: rgb(5, 99, 193); text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">http://www.members.re-wrenches.org</a></div></blockquote></div><br class=""></div></body></html>