<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="">Christopher,<div class=""><br class=""></div><div class="">I can\u2019t be certain, but I suspect that the APSmart units have the same circuitry as the Tigo RSD units. I say that because of the press release below. I suspect that the only difference is the enclosure, but that is merely speculation. Interestingly, I worked for Tigo nearly a decade ago. Way back then they had just developed the \u201cPV Safe\u201d button, which if I recall was essentially just a software feature. I remember giving a seminar with Brooks in audience - he was very intrigued and said that this side feature was probably more important than any of the other whiz bang stuff that we were trying to promote. I think this was right around the time when RSD was first being discussed. The irony is stinging me now that I was, and I must admit still am, a proponent of finding some way to safely de-energize panels/arrays (just not with a piece of plastic junk). I like what Einstein said \u201dInformation is not knowledge. The only source of knowledge is experience. You need experience to gain wisdom.\u201d <div class=""><br class=""></div><div class=""><br class="">APsystems Withdraws IPR Cases With Patent Office Against Tigo Energy and Signs License Agreement <br class="">April 28, 2021 01:51 PM Eastern Daylight Time<br class="">SEATTLE--(BUSINESS WIRE)--APsystems has announced that the company has withdrawn its IPR cases with the patent office against Tigo Energy following the joint settlement reached by both APsystems and Tigo Energy in the IP dispute.<br class=""><br class="">While APsystems denies any kind of infringement and complies with Sunspec RSD requirements, to avoid the expenses and inconvenience of litigation, APsystems has agreed on the settlement with Tigo under which APsystems obtains a license to use Tigo\u2019s rapid shutdown technology. The licensed technology is the same as the 6 patents that Tigo disclosed to Sunspec in 2017.<br class=""><br class="">APsystems will continue to deliver leading edge RSD solutions to its customers.<br class=""><br class="">Terms of the license agreement are not disclosed and include APsystems legal entities in the US as well as in China.<br class=""><div class="">
<div style="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; text-decoration: none; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);"><br class="">Best Regards,<br class="">Jeremy Coxon NABCEP # 091308-21<br class="">MWBE Certified</div></div><div><br class=""> 1. Re: Exploding RSD Unit (Christopher Warfel)<br class=""><br class=""><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><br class=""></div><br class="">
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<div class=""><p class="">Is this the same concept as Tigo? (and others)</p></div></div></div></div></body></html>