Dear Victron People,
Set-up: 5 kW 48 V Multi (2624430); CCGX (v2.22) ; 2 x SmartSolar Chargers MPPT (v1.37) and 4 x Pylontech US2000 batteries. ESS in Optimized (with BatteryLife) mode and Feed-in excess sloarcharger power enabled.
When Grid setpoint at 50 W a small amount of PV power is used to keep the batteries charged and the available PV power is not used to supply AC load or feed into the grid. Effectively the PV power is disabled.
I can only circumvent this by setting the Gird setpoint to a negative value equivalent to the available PV power. The Multi then inverts this amount of power to AC as grid feed-in using the PV power available and when not enough PV power at the time, by discharging the batteries until the Minimum SOC is reached. The PV power (and sometimes AC power!) is then used to recharge the batteries (but not to 100 %) and the cycle then repeats.
My understanding is that when ESS operates correctly the PV power should first be used to supply the AC load, then charge the batteries and then feed into the grid. I am migrating my systems to not grid-tie but not working.
It appears that the CCGX malfunctioning.
Is there another possible reason for this aberrant behaviour?