We recently migrated our battery system from a bank of 48V Pylontech 2000 batteries to a bank of Eco-worthys at 51.2V.
The Eco-worthy bank was fully charged before we connected them and the Cerbo displayed them at 100%.
We have 4 MPPTs charging the batteries and everything is connected to the Cerbo. The Eco-worthy bank shows up on the Cerbo with the correct number of units and Ah.
Since making the change, we have noticed that the charging only kicks in below 95% and then stops around 95%, even in full sun. Previously the MPPTs would charge the Pylontechs to 100%.
I have read that there are some tweaks that dealers make for Pylontech and I did find that on the Cerbo the Charge Voltage Limit is set to 54.4.
The system was totally shutdown and restarted and that did not help.
Suggestions welcome on what to look for/ tweak to get the system up to full operation.
Speaking of the Cerbo, the firmware is not up to date - I will do an update via USB this morning. I read somewhere that this might cause the Cerbo to properly reset the CVL.
If yes, the system will take the info needed from batteries BMS, without user intervention.
The sole thing you have to do is to make sure you don’t limit the voltage from DVCC pages. (unless there is a reason for that)
If not, use VEConfigure to set the proper voltages in the Charger section.
By proper I mean the voltages recommended by the battery manufacturer.
It wont hurt to set them anyway.
Yes, DVCC is enabled but for some reason is defaulting to 54.4V for the Charge Volt Limit which would make sense for the Pylontechs but not the Eco-worthys. I’ve tried pressing the “redetect battery” but that has not made any difference.
This morning I checked the Charge Voltage Limit on the Cerbo and it showed the correct setting of 58.4. Today it is pretty overcast so I doubt the batteries will get to 95% but once they do I will monitor to see if the CVL changes back to that lower setting of 54.4.
The DVCC settings say “Forced On” and controlled by the BMS of the batteries.
Then you are OK.
The 95% figure could be temporary, because of the new batteries, up until they “break-in”…
Anyhow, enjoy you new set-up and think less about it.
The BMS of the Eco-worthy master battery is changing the CVL as far as I can tell - this afternoon we did get them up to 98% for a moment and then they were just discharging and no new MPPT in was happening until they got down below 95% - the system is “exercising them” between 94 and 96%, using that energy instead of just the PV input. The CVL was changed by the BMS back down to 54.4.
As for being detected as Pylontech, I did not see anywhere that this would be indicated. In the device info I do see serial number and number of batteries and total AH and that all looks OK.
The device name would be pylontech. If it isn’t then that isn’t a factor.
Chart out the bms limits in advanced widgets. It will show what is being sent and when. You can create a custom widget that overlays soc as well.
You can change it, yes.
If this battery presents itself as pylontech for compatibility (some batteries do), then it would find itself a victim of the dvcc customisation for that brand since the cerbo won’t know it is a different brand spoofing pylon.
There is a CAN setting on the Eco-worthy battery which I changed before connecting to “Victron” but I am not sure if that is related to what it is telling the Cerbo.
Charge changes for pylon were made in 3.50 and only apply to 15 cell batteries. For any battery requesting a higher cvl it isn’t relevant. So any cvl originates from the bms.
That is what I have been seeing - I made no changes to anything and the CVL changed from 58.4 this morning to 54.4 this afternoon and then to 58.4 again when I checked after updating the Cerbo firmware.
Some folks in other discussions have suggested that the issue is cell balancing being off and the BMS giving wonky instructions to the DVCC.
