Please help me out with this one: does Victron allow stop charging from grid? I tried switching Multiplus-II/Charger to OFF (from VictronConnect, using MK3-Usb-C interface), also tried with Charger ON but limited to 0A.. nothing works. My system keeps charging, on and off, (in random cases,even with batteries at 97% and sunny outside!!) batteries from grid.
In ESS my mode is “Optimized without battery life.”
Any help would be super appreciated.
What do you suggest? Just tell me what to try and I will it a shot, if you have any ideas.
@TomBerger I’m ignorant on this. Does this stop only AC charging as opposed to DC charging since DVCC also controls MPPTs? How does the system “know” that I want to shut down only AC charging? I thought just shutting down the charger in an inverter was enough? I realize that this didn’t work, strangely, for the OP.
The simplest method to find out is to try it out yourself. Strictly speaking, this doesn’t stop AC charging in general, but only charging from the grid. The excess power from a PV inverter will still be charged into the battery first. And charging from the MPPTs will continue as normal.
@TomBerger it does not work; when I set “limit charge current" to 0A, batteries stop charging completely, solar panels only generate energy for the house.
You have other ideas I can try?
@alexpescaru so what does that mean? My BMS is not on that list? Can I override it somehow? That’s a weird piece of code anyways..
AFAIK it also depends on your battery/BMS and how it is connected to your system. The battery settings then override the other settings to some extend. You need a CAN-bus BMS. And you need to set the ESS/ Grid feed in settings accordingly:
In my system (MPII-3000GX, MPPTs and PV-Inverter) these settings are working perfectly. Indeed just this night my battery reached low voltage and did not charge from the grid.
From 1:00 to 6:00 the battery remained at 20% SOC ithout charging from the grid, and started charging from MPPTs and PV-inverter as soon as the sun came out.
If you do not need charging from grid EVER, you can set up the MultiPlus through VE Configure and there under Charger set charging current to 0 for each individual MultiPlus.
But on its own, the system should not charge from AC on its own, unless you have “optimized with battery life” on, using dynamic ESS or set “repeated absorption interval” too often.
Does it happen every time you connect to grid, or just sometimes? Any pattern in this behavior?
In a correctly configured ess grid will never be used to charge unless the battery is 3% below the minimum soc or you have configured a charge schedule.
It will hold at minimum soc and supply loads from grid while dedicating all available PV to the battery charging until it is 3% above minimum soc.
Sounds great; and this is how it works on my neighbours systems (cheaper! ).
But in my system, the inverter goes to “bulk charging” and start charging from grid whenever (not long..maybe 2 minutes, and then after 30 minutes time another 2 minutes…) maybe there is a pattern but I cannot identify it. This happens way above SOC.
This is how it worked from the start. If I stop AC input manually (before it reaches the invertor) it works perfectly.
I have no Node-Red flow. And this is my ESS and DVCC conf.
@nickdb I don’t see menu entry for those settings you asked.. I looked for them in a few places.
Indeed both my “Battery selected” and “Battery monitor” are both on automatic,but for both of these I have an “Automatic selection" value underneath and it seems my BMS is the one that is selected. But this is a test I will do tomorrow, jic.
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