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RSD Button press cuts power to home

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(@potrero)
Active Member
Joined: 7 months ago

When we test RSD on a 1x Gridboss + 1x Flexboss21 system with the whole home in backup, we find that power to the home is cut when the RSD button is pressed. We deliberately don't include the Gridbsoss in the RSD circuit, we leave the jumper in. We did this in hopes of avoiding cutting power to the home when RSD is accidentally pressed. The AHJs only care that the RSD shuts down the ESS/solar, as first responders separately turn the home's main breaker off anyway.  Would love to understand why this happens! 


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Posts: 158
(@jlankford)
Estimable Member
Joined: 1 year ago

I have an 18Kpv installed as a whole house backup (entire 200A service runs through the 18K). RSD shuts of all power to the house. This is expected since RSD causes the battery banks and the inverter to fully power down. Since the default position for the grid relays in the inverter are open (i.e. no pass through) until software boots up and closes the relays, it's expected for all pass-through power to be lost when RSD is pressed.

I expect that the software logic for the Gridboss is the same (grid relays default open). I can't comment on what it means that you left the gridboss out of the "RSD circuit." In my understanding, the RSD action is propagated throughout the entire system via the RJ45 comm cables, from whatever device initiated the RSD.


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EG4 Eric
Posts: 761
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(@eg4eric)
EG4 Online Support
Joined: 1 year ago

@potrero
Do you have an external RSD initiator/button?


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