[RE-wrenches] How to shed a load in a subpanel that is in a building other than where the solar system is interconnected

[Christopher Warfel]

We installed a 4kW Outback multimode system about 8 years ago.  An 
electrician came in afterwards and installed 3 heat pumps on the battery 
backed up power panels.  The Outback inverter disconnected on load every 
time there was a power outage. The electrician really messed up and is 
long gone. Also found out did not pull a permit. But I digress.  We 
managed to move two of the heat pump circuit breakers to the utility 
panel, so no longer on the battery backed up power panels.  The third 
heat pump is the problem as it is located in an apartment building 
remote from the main house. The whole apartment subpanel, including the 
heat pump load  is interconnected to the "main" battery backed up power 
panel in the home.

A master electrician and I are considering how to shed the apartment 
heat pump in a power outage.  We cannot easily run a separate circuit to 
the apartment building to pick up this load.  We have considered a smart 
panel, but the cost seems high for one circuit. Does anyone know of a 
power line product of RF product or similar that could operate this 
breaker when the main service panel loses power? I have been 
unsuccessful over months of sporadic research.

Thanks in advance.


Chris








-- Christopher Warfel, PE ENTECH Engineering, Inc. PO Box 871, Block 
Island, RI 02807 (401) 447-5773