No, that’s not normal. There are some changes in the rate every now on then as the schedule is updated, or a soc-report is coming in - but it should never be that big and ofc not fall down to 0 during a discharge schedule.
Is your Solar-Edge PV “visible” to the system? I.e. does it know it’s momentary power production, or do you usually just relay on a grid-meter to absorb that additional solar power?
The later will not work for DESS, it needs to know the concrete production of attached ACPV to calculate proper setpoints throughout the system, as for DESS the grid will turn from a “measurement” to a “controlled value”.
What are your grid and battery settings in VRM?
Do you have setup either PeakShaving or AC-Current limits that may “mess” with these settings?
Do you have DVCC enabled on the GX? (That is required to be able to achieve a desired rate)
I saw something similiar once, and the reason was missplaced CT-Clamps on the grid meter. Then the values the meter reported did not align with expected values (per phase) and that totally messed up setpoint calculations.
Do you have your loads on acin/out or both? If just on acout, you could try to set the ACSystem configuration to “Inverter/Internal” Measurement and see if the problem remains. If it’s gone then, there may be an Issue with the grid meter. (configuration or hardware-wise)
I can see one more discrepancy I have.
My grid connection is 3 phase, while I have only one Multiplus connected to L3.
While it is not configurable option, Victron assumes it is on L1.
I have set “Total of all phases” option set, so in fact I’m not sure if that’s matter, but maybe I should rewire it to L1?
Oh, yes absolutely. You should wire that to L1. Else the maths on a 3 phased system would be wrong. Beside just wrong consumption figures, that may affect setpoint calculations and more, as all the desired “reactions” the system tries to achieve on L1 will happen on L3 instead.
