I am using 2 x Multiplus 2 48/3000 (parallel on phase 1) in an ESS configuration with a Pylontech Battery US2000b+ (9.6kwh total) and a Venus device with EM24DIN. There also is a Fronius Symo 15-M AC coupled inverter with 10kwp PV connected.
All this in Germany on a 3Phase grid ("Schieflast" is avoided by other measures).
The second Multiplus was only installed yesterday, since then I observe that the grid-setpoint is never reached, there is, especially on battery, always a much greater consumption from the grid than set.
Grid Setpoint is set to 10W, true average consumption from the grid is almost 200W all through the night. As I stated: this is only true since the installation of the second multi.
If I adjust the setpoint to -200W, consumption drops but as soon as the solar kicks in during daytime I am exporting more than I want.
What could be the reason?
Thank you very much!