For the last year or two my setup has been running flawlessly. It consists of:
1 Cerbo GX (Ran Firmware 3.30 before things started happening when upgraded to 3.42)
3x MP-II 48/5000 Firmware 497
5x Pylontech US5000
Victron EVCS NS. (2.00)
Since a week or so the system updated to 3.42 and started charging/discharging 24/7. I’ve placed the system in keep batteries charged and that worked. During this I checked all the settings, all the connections, etc. but I can’t find a thing.
When I look at the VRM dashboard the MPII icon keeps changing from “Externaly controlled” to “discharging” and back. And eventhough there is a 90% plus charge in the batteries It won’t cover my AC-load at any given time and it uses the grid too…
The strangest thing is that this behaviour started after I updated to 3.42 AND/OR we experienced a power-outage on the same day. I can’t really figure out which is the culprit and if it’s just software or hardware that is causing this behaviour. The entire area had an outage for 15 minutes due to a lost transformer that caused the voltage to drop and turn of the grid in our area.
[Edit]
I found SCS (Shared Current Sensor) to be turned on. I can’t recall if that has been the case since I installed the system.
Looks to be in order. I also tried to detect the battery again and this hasn’t resulted in anything new…
I wanted to look into the DESS ahead of the end of my current contract. I returned to 3.30 without succes.
I’m going to turn the switch tomorrow and by pass my entire system so I can reset everything with a fresh installation and config file. If that doesn’t help I’m going to disconnect one US5000 module at a time and see if one is the trouble maker…
Suggests it is not out of the blue, it happened after the firmware update, since it is not a complete system update the start point for troubleshooting is to update the rest of the system.
The second option is to factory reset the cerbo (rollbacks dont always go right). But this doesn’t make sense if you want DESS.
Are you in parrallel or three phase? The tag on the post says parrallel… But three inverters is usually three phase.
That’s a good point. On the other hand, I was at home at the moment and updating because of the planned DESS when a poweroutage struck around the same time… The Cerbo has a 48V supply so that wasn’t hit and the MPII also run on 48V but still it could have messed up an update.
I’ve just turned off my entire installation and will update later in the weekend when I have enough time to do so without time-pressure. In the meanwhile I’m looking up the correct firmware files.
Since I’ll be starting fresh with the software, would a new config file be needed too? Are the assistants also different from what my MPII had so far?
Yeah a firmware update means a fresh start.
Easy to set up a three phase with VC now.
But the rest for ESS is done with ve bus configurator and ve config.
Make sure all your programs are up to date before beginning.
And i know you know about the guide.
So you say that updating VenusOS software ie from 2.92 to 3.42 or the new 3.51 require to also setup the inverters VEConfig? I have always seen this as 2 different things.
One is software like windows on a computer, the other is more a bios setup which do not need to be updated/altered due to a windows update(best example I could think of )
I have updated or refreshed my VenusOS many times without touching the inverter setup VEConfig.
Please elaborate why this should be redone due to a software update?
I downloaded a fresh 3.51FW for the Cerbo, the 552Firmware for my Multiplusses and installed all of them. I updated the ESS assistant and still it’s acting strangely.
Somehow the batteries stay charged at their usual 52.3V and I’m running of the net instead of my batteries… Eventhough the ESS setting is set on optimized without batterylife. (It should discharge them until minimum SOC is reached).
My guess is something is wrong with the software on the Cerbo. Going factory-reset the thing now…
Update:
Factory Reset the Cerbo too…
Currently getting this, Still strange. Why is there so much on L1 flowing back and so much being pulled from the grid…
Ok, so that’s fine (can’t remember from a few weeks back if it said – or a number.)
My SMA is connected via the TCP server it hosts (internally routed in my network, fixed IP adres and all). This shows generated per L1/2/3. My second set, GroWatt inverter, is measured via a single fase ET112 (USB connected to the Cerbo). Measurements seem to be accurate on the cerbo when compared to the SMA and GroWatt companion apps.
Grid is measured via an ET340 connected via the Cerbo.
Set-point = 0
The strange thing is however, the behaviour. It won’t use the batteries but rather the grid and in a strange way. (Why is there a load of -5kW on L1 and 2.5kW in on L2 and 3?)
Phases have been correct since the install, nearly two years back…
But why would the setup not use my battery and instead use the grid, also why would it use the L1 at -5kw and the others at 2.5 if there is no need?
The biggest load was on L3 (the heatpump) drawing 1150 in the screenshot. Before this would be drawn from the battery. The same for L1 and L2 with their 360/686Watts.
Its probaply on multi phase regulation ( supposed to) and is keeping the net sum equal thats why the high number, also as it is on 0w setpoint it tries to keep it at 0w and thats difficult for the system
Thats why i asked to try a different value
Im using older venus OS and multiplus firmware so dont know the exact differences
)
