Thanks for the suggestion of using a SPDT; but there is a who's-on-first problem there.
Normally the switch supplies utility power to the RS controller. When that goes down, we want AC from the Secure Power. But that won't activate until the inverter gets solar power, which is now cut off by the RS system that needs AC to activate it first....
Don Barch
Energy Solar
Date: Tue, 5 May 2020 08:35:51 -0400
From: Tump <t...@swnl.net>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Rapid Shutdown Compliance
Message-ID: <7273560e-f55b-4007-824e-fd6bb740a...@swnl.net>
Content-Type: text/plain; charset="utf-8"
How about a SPDT switch, all one is doing is supplying AC voltage from the utility, (powering the MLPE box's Ac to Dc converter) their utility or SSP from the SB's utility.
> On May 4, 2020, at 8:04 PM, <d...@energysolarnow.com> <d...@energysolarnow.com> wrote:
>
> Many customers ask about keeping power alive when the grid is down. Besides battery backup, I advocate the Secure Power feature of SunnyBoy inverters.
> But the problem with MLPE is that it is incompatible with Secure Power. When the grid goes down the MLPE disconnect each solar module's DC feed. So when the Secure Power activation switch is thrown there is no DC to power it up, even if the Secure Power output is fed to the MLPE power feedin.
> So I have only been able to install SunnyBoy Secure Power on existing systems without Rapid Shutdown MLPE.
>
> Does anyone have a work around for this, short of installing a separate small battery backed inverter to keep the MLPE alive?
>
> Don Barch
> Energy Solar
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