I’ve done some more testing now. Currently my AC PV inverter is supplying 10kW to the system (on AC-in).
I have disabled DESS for this test and I have set a grid setpoint of 0W to the Multi RS L1 and L2.
I am testing with L3 since I do not have any loads on L3 at the moment.
I have set a negative grid setpoint on -6000W on the Multi RS L3, but I am limiting the grid current in different steps to see how the system reacts.
First test: grid setpoint -6000W but current limit on 10A. The system shows a feed in of exactly 10A on L3:
Next test: grid setpoint -6000W but current limit on 16A. The system shows a feed in of exactly 16A on L3:
For the next test I had to switch to the Multi RS of L1 since the AC voltage on L1 is lower in my area and for the last tests we need the PV inverters to stay online (because they will shut down at 254V)
Next test: grid setpoint -6000W but current limit on 20A. The system shows a feed in of exactly 20A on L1:
Last test: grid setpoint -6000W but current limit on 25A. The system shows a feed in of 5000W or 20.2A on L1 and it will not go above that value, even if the Multi RS is hardly doing anything:
Now as soon as I disable “Energy meter support”, the feed in goes beyond 30A or 7500W, but since my main fuses are 3x25A, I cannot disable the energy meter support.
I hope this makes this bug/issue even more clear to the victron staff/developers.
And to add to this, this issue only happends during GRID FEED IN, not during feed from grid!