I set my battery charging to 50% max between the hours of midnight and 5am, this worked last night.
Just now i checked the vrm on my phone and noticed it has charged the batteries full during this afternoon, even thought ive set it to optimised without battery life.
I wasnt aware( being in work) that the batteries were charging without a top end limit. Why would it do this?
Im preparing myself for a cheaprate tariff next week, and this happens during a peak rate, it wpuld cost a lot more and defeat the objet of cheap rate charging.
Can anyone please help
Ive used over 30kw in a potential peak rate. How can i stop this charging at its own decision?
Hi. According to picture I thing, that it is working correctly. It charged batterry fom solar. ESS charge limit is only for grid charging, not for solar.
If you want to stop charging from solar, you can use DEES, program via NODE-RED. The simpliest way would be switching solar regulator(s) off by remote-off contact and remotely switched or programmed relay.
I only produced 10kw of solar today, and the battery was at 40%soc when i looked before the sun started to shine. Also during the day i have a base load of around 1kw, so a lot of that solar would have been consumed directly. Also it states i pulled 38.8kw in the last 24 hours from the grid which sounds about right as my battery is 42kwh and i set the discharge cutoff to 15% and when it started charging to 50% last night it was at 15%
It finished charging by about 2am to 50%soc.
But this afternoon at around 35%soc it appeared to have started charging via grid right upto 100% but i never set it to do this.
The mp2 has one active assistant which is the ess assistant, and its only the ess i have a charging timer set to come on at midnight.
Yesterday the system was virtually the same , at the same time of day, but it didnt decide to charge Yesterday. Is there a setting in the cerbo gx i may need to change?
Now I see.
What about now? Is it still kept chrged to 100% or it dropped down later?
Except accidental wrong setting of scheduled charge in GX and accidental cheching “Keep batteries charged”, I don´t know…
When you are on charge limit, you should see “ESS #1” sign on a dashboard, or some another one. This is how you can recognise if the carging is caused by ESS or not.
As soon as it went to 100% it stopped charging and started discharging, its now down to 73% so shouldn’t start charging between midnight and 5am as its already over the 50% limit i set.
But still dont understand why is decided to start charging this afternoon. Ive double checked my settings and all looks to ne set correctly.
Ill see if it starts charging again tomorrow, same time, that might give a clue. Ill report tomorrow evening.
Check your DESS settings: you probably have Battery Balancing enabled.
While this forum may give you a lot of answers and pointers, you’re probably better off paying a professional installer to set up your system.
He doesn’t have DESS enabled. One can conclude, from seeing the tips of the christmas trees bellow the system summary box, with dess enabled, there would be another box, first 
@mfred868 what kind of batteries are you using, bms?
I stand corrected.
Well, at least one of us is properly awake 
The battwry brand is Rahvolt, i have 6x 7kwh batteries connected in parallel (2 more to be added later this year)
They each have a built in bms which are daisy chained together and connected to bms can port of cerbo gx.
They show up as Pylontech as one big battery.
However they dont seem to discharge evenly. Around 2 days ago some were under 25%soc while some were 50% and one was 75% judging by the leds on the batteries. They havnt been charged to 100% since last summer, so not sure that may have something to do with it suddenly charging the batteries up fully without my input? If this continues ill have to go off grid and forget ess, as i cant afford to have the system going into charging mode at peak rate!
standard ESS, correctly configured does never do that.
Something else must have been the trigger, if not your own (falsely configured charging schedule).
real Pylontechs normally won’t do that…however, I know of some other brands that perform a “self-balancing” from time-to-time. But I also don’t know if the BMS could instruct the GX to perform that task.
Hi,
I wonder if this phenomenon could be similar to the one I have also experienced and described (have you checked if any of your ESS parameters might have changed spuriously?) : MP II domestic ESS : two freak events of charge to 100% using grid
It looks like it charged from 12 pm to 5 pm. Do you have the local time set correct?
Maybe ESS could be overruled by battery? I´m not sure if it is possible, but if the battery was not charged to 100%, itmaybe “want” to be fully charded to balance.