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Hi there i have a , Mulitiplus 2 in ess mode , cerbo gx, vm-3p75ct grid meter
is there a way to zero consumption from grid via ac in from battery
only a.c in and critical loads are wired on multiplus , non critical loads are wired upstream of multiplus
i have set grid setpoint to 200w which works fine when solar pv is active, but will not use battery power to negate grid consumption
Hi @Mattm082,
If I am understanding you correctly, there is a setting on the GX device in the ESS menu to change “Self-consumption from battery”
To either
From your screenshot, it looks like the multiplus is at least supporting the AC Loads with ~ 100 Watts.
What type of battery and multiplus do you have?
May it be possible that the current 23.4A is the max this setup could provide, therefore not capable of providing more power to the AC-Loads?
Hi @Mattm082,
I have another report of a similar case, but before I can escalate it internally the first step is that all Victron products need to be brought up to date with the latest release firmware.
Can you please make sure that your GX device, and MultiPlus are running the latest release firmware (not a beta) and report back?
Hi @Mattm082,
Thanks for updating the firmware.
I had a closer look at your system. There are two potential issues that stand out to me.
Firstly the AC voltage on your MultiPlus is fluctuating up to 5V out of sync with the grid voltage reading from your energy meter.
The only way that I can explain this is that there is a poor electrical connection to the AC input on your Multi, somewhere between the AC input terminals and the AC distribution. That is the first place I would ask a suitability qualified electrician to investigate with properly insulated tools and a thermal camera.
It could be a loose screw, corrosion, undersized cable, damaged circuit breaker, or something else.
Just for comparison purposes, have a look at my system and see how steady the two AC voltage readings are between the Multi and the Energy meter - almost perfect lock step;
While I was looking at your VRM I also saw something else, your BMS is imbalanced and giving constant warnings, and even alarms. I don't think this is the main cause here, but it surely is not helping. You need to balance your battery. 
