New residential install of a Multiplus-II with 600 watts of solar from SmartSolar MPPT. I'm in the U.S. and must NOT feed back into the grid during a power failure. Despite having DC feed-in disabled, the system still shows several instances during the day when AC in was negative and Grid Feed-In was positive. Batteries were not fully charged and the amount of solar at the time was only about 100 watts.
I've set the Grid Set Point to zero and that seemed to reduce the feed-in from a couple hundred watts to just a couple dozen. But I need to know: will this system attempt to feed power back into the grid during a power failure, thereby creating a hazard for utility workers or will this behavior only ever be seen when grid power is available? The whole concept of ESS is one of the primary reasons for buying this system and I don't want to give up on it needlessly.