Hi Community.
I have an unusual problem (2 actually). Running MP-II's coupled with Fronius Primo. Modbus TCP control with Cerbo. (edit, for clarity the Fronius is on the OUTPUT of the Victron)
Living with very unreliable grid, so I have set the mains voltage very wide (down to 180V disconnect, 200V reconnect on a 230V grid).
First issue I see is the MP-II will not charge the batteries when the mains goes below about 200V. Worse still: it exports all the solar and only a very small trickle to the battery. SOC limit set well above current SOC. limits are turned off. Also tried scheduled charge, but seems to ignore that.
Second is: when the voltage is just below 180V (disconnected, and voltage stays below the reconnect voltage) it holds the Fronius in Zero Export (like its expecting to connect, but the voltage does not pass threshold). I have checked it does not shift the output frequency, so it must be either pausing coms or throttling the Fronius. Just sits there indefinitely and depletes the batteries. Fronius set up MG50 according to victron recommendation.
Any one else have this situation?