Hello! Since a few days ago my victron system is charging the battery uing the gird. In the ESS configuration i have disabled the option of balancing the battery, and the option to not charge the battery from the gird, but it’s still doing it… How can i can avoid this? Until a few days ago it never did it… By the moment the only wai I find is disabling the ESS…
What is your battery voltage around that time, and what “sustain voltage” have you set in the ESS configuration?
it’s always at 100%, and it mantain it at 100% and covers the house consumption… Where can i see the sustain voltage?
Could you post your config file here …
With SOC at 100%, though, it doesn’t initially sound like the “sustain voltage” … that shouldn’t actually be reached … that would already be a deep discharge …
Which mode is your ESS set to in the Remote Console? …
Is the switch on your Multi set to “1” or “2”?
This is not ESS but DESS…
Do you feedback to gird for any reason? If you don’t have a reason to do so disabled it
This is now ESS. So what are you actually trying to do with the system? What is your use case.
Hi Ed — the DESS point LX raised is worth checking first. If Dynamic ESS is switched on in VRM it makes its own charging plan, so the ESS page can look like grid charging is off while DESS is still pulling from the grid to hit a target. Turning DESS off and then re-checking the normal ESS settings usually makes the behaviour much easier to follow.
On a normal ESS setup I would run through this order:
Set ESS to Optimised without BatteryLife, and make sure all the Scheduled charge levels are disabled. Keep batteries charged will hold the battery at 100% from the grid, which sounds a lot like what you are seeing now.
Check the Multi switch is on position 1 (On), not 2 (Charger only). On 2 it will just charge and pass through.
Have a look at Minimum SOC and Sustain. If the battery dips below the minimum, the system will do a slow sustain top-up from the grid even with grid charging unticked. At 100% that can look like it is maintaining the house load from the battery, when it is actually holding the battery and covering the load from AC-in.
If you can, post the ESS settings page from Remote Console plus SOC and battery current when it is doing it. That will show fairly quickly whether it is DESS, scheduled charge or sustain doing it.
I want to avoid to charge the battery from the gird. Randomly it starts to take power from the grid when the battery is at 100% to keep it charged and powering the loads of the house.
The problem is with DESS for shure, when I disable from the control panel on the VRM, it stops to take power from the gird. The switch on the Multiplus it’s on 1. In the last screenshot I shared, you can see my ESS config is like as you say. And in the DESS config allso I configured to not charge from the gird… Could it be it’s doing this because of the bad weather in the forecast?
If your battery is at 100%, it is not charging it from grid?
It is driving your loads from grid by idling the battery?
DESS calculates an “ideal” schedule for your system. That is its purpose. If it idles the battery and forces loads to be covered from grid, then it is doing that, because it concludes that it is financially better to do that under all dess configurations and forecasts.
But what is your expectation from using DESS, when restricting grid2battery? Maybe there is just a missunderstanding on when you need/want DESS and when not?
My intention is to use the grid only when I run out of battery power. I don’t want to buy electricity, or at least only do so when necessary. I understand that if a week of rain is forecast, I might buy electricity at night when it’s cheaper and use it during the day (if it’s cloudy); but that’s not the case here, because I have enough energy in the battery to last two full days! If I had 25% battery at midnight, and cloudy weather was expected, I would understand the need to charge from the grid, but not when it’s at 100%.