Date: Wed, 27 Apr 2022 12:08:24 -0400 From: Dave Tedeyan <d...@sungineersolar.com> To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: [RE-wrenches] SMA Rapid Shutdown and Secure Power Supply Message-ID:
Content-Type: text/plain; charset="utf-8" Hi All, The last SMA-41 inverter I commissioned, had the option for SunSpec rapid shutdown with Secure Power Supply. I just talked to a level one tech who was not particularly familiar, but told me that with a sunspec rapid shutdown device like the JMS-F, you can still use the Secure Power Supply as if there was no rapid shutdown. I had stopped installing the SPS on rooftop systems, because if losing grid power initiates rapid shutdown, then you clearly do not have the power to run a SPS. But it sounds like maybe the inverter has the smarts to wake the solar back up once you flip the switch to activate the SPS. Can anyone here verify this? Have you done this, and does it work as expected with no extra hardware needed? Cheers, Dave -- [image: Logo] <https://www.sungineersolar.com/> Dave Tedeyan, P.E. Owner | Sungineer Solar p: he | him | his a: 1653 Slaterville Rd. | Ithaca, NY 14850 w: www.sungineersolar.com<http://www.sungineersolar.com> <http://www.sungineersolar.com/> c: (607) 288-2898 Hi Dave I just installed a pair of SB7.7-US41 inverters with the JMS-F Sunspec devices. The onboard software setup specifies that the Secure Power outlet will not work with the JMS-F devices. These are de-activated when the AC power is off, so even if you connected the Secure Power outlet there is no signal to turn on the JMS-F switches. Don Barch Energy Solar 707-483-4751
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