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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