VE bus AC output power differs from the VRM AC output consumption by double at night time periods. There is also an external AC energy meter EM24 (calibrated on site) which runs similar to the VE bus AC output power. During the daytime period the VRM AC output consumption displays the same as the Grid energy meter. Then doubles at night time period.
There is three x 25000 SMA 3 phase inverters charging this system during the daytime period.
1. Day time - output power correct
2. Night time - output power differ - AC consumption double
3. Day time - grid inverters turned off
What options are available to correct the VRM AC output consumption to make it display the same as real time consumption as per the grid energy meter.