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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