I am using a 3 Phase System with a MppT + Smart Shunt + Color Display .
Problem is: Display shows Discharge on Battery, see Pic1, although the only POSSIBLE way for the currrent to go is to charge the Battery. The LEAD Battery is charging per acid reading.
With the settings of the Battery i know for sure that they might be incorrect - standadized settings.
The smart Shunt is polarized correctly - MINUS to System to GND System with 3 Phase System; Minus to Battery to Minus Pole directly on one Pole.
With this setup I already had a correct Current/Charge Reading once; I did however take too much out of battery (battery acid reading showed enough SOC but Display had a lower percentage saved for safety meassures - so battery was in fact still ok to be used - Display did not activate Grid support as it should have - it now does) and the polarization inverted on its own. It went from low percentage to suddenly 100% with negative currentpolarization.
Another issue I face/question I have is that with disconnected Grid and disconnected Load, the only apparent path for the current to take is to charge the Battery. However as you can see in pic 2 the battery still shows a discharge, the Mppt shows correctly positive 5A and positive voltage ( instead of -1A what Color Display shows). Also there are roughly 600W missing in the System ( PV brought a constant of 700W so there is no fluctuation there either.
To summarize my two issues are: Why does my battery charge but is displayed as discharge when Polarization to Battery should be correct
Why am I missing several Hundreds Watts in Display and why does MPPT show a different Current than Color Grid.
All Loadcomponents from System are hooked up on 3Phase system. Nothing else is hooked up inbetween so I am not sending Watts elsewhere undocumented.