I just installed a HEMg5 120/240V split phase meter and have the parameter 2 (energy detection mode) = 1 or 2:
1 = Report positive/negative power, report the algebraic sum energy;
2 = Report positive/negative power, only report energy positive part (consuming electricity)
What I find is that if the current through either CT goes negative, the UI7 device display reports 0.000W for that clamp as does reading the device Watts variable directly. This creates an incorrect reading if you have say -200W power on L2 and that 200W returns on L1 to power another load in the house on the other side of the breaker panel. The -200Wgoing out L2 is zeroed out and the HEM reports just the +200W coming in on L1.
Is there any possibility of updating the controller firmware to report both positive and negative power numbers? It seems that there is some internal range checking that’s clamping the minimum power to 0.000W. Maybe have an option to disable that clamping function.
VeraPlus w/ 1.7.5186 (7.31)