Dear Deye support!
I’m using a Victron MultiPlus-II 48/5000/70-50 inverter with Deye RW-F10.6 batteries, connected via Gerbo GX (RJ-45 connector wiring was changed properly and the battery is visible as a separate device).
All works good with 1 x Deye RW-F10.6 battery setup, but when I connect the second identical Deye battery (using an original Deye data cable), a “VE.Bus System - MultiPlus-II 48/5000/70-50 [276] - Low battery: Alarm” error appears and the alarm repeats every minute. Both batteries are charged to ~90%, Cerbo GX shows two batteries as one device.
Help me please to solve this issue!
Regards, Andrew.
I have not had personal experience with Deye.
It does sound like the batteries are possibly going into protection.
Are you connecting to an already live system?
Usually when multiple batteries are connected they will usually combine as one device.
You should see the total amp hours increase as well as the DCL and CCL on the GX though as confirmation that the comms are working.
Confirm, you have connected the RJ45 from output to input B1 to B2?
Have you tried just with the GX and checking comms without switching on the inverter?
Yes, the system is already live, RJ-45 is connected from OUT in first (primary) battery to IN in second (slave) battery, comms are working and batteries are synchronizing successfully on startup.
The alarm error appears only when inverter is ON, Cerbo GX doesn’t show any alarms when inverter is OFF.
Do you want me to provide a log file in *.xlsx?
Sure you can.
Have you verified with a meter that the battery is repoerting its voltage correctly and that the inverter is reading its terminal voltage correctly. (A d fuses in between are ok)
The onky other thing i can rhibk of that will trigger low voltage is the c raring cut off voltages in the ess assistant.
Could you help me to find this cut off voltages in the ESS assistant?
I’m using a VRM portal and a virtual panel of Cerbo GX, also I can download a config file for a VE Config.
It will be in the ve config file under assistant tab
What is the battery voltage? Not interested in the SOC at this point.
The other thought maybe that the precharge is not so elegant hence the low voltage warning.
Battery voltage is 53.3V according to Cerbo GX monitoring system and 53.1V according to BMS of the batteries. See attached log file.
The “Low battery” alarm starts from 20:02:09 (the system was turned off, the second battery was connected and the system was restarted) and ends 20:11:30 (the system was turned off, the second battery was disconnected and the system was restarted).
Export_log_20250114-0000_to_20250114-2359.zip (96.7 КБ)
Will check it over when things settle down.
What the setting on inverter tab no 5? Low battery alarm?
LX, did you have a chance to check all the info I provided?
Hi yes. Sorry I didn’t get back to you. Nothing in the voltages looks out of the ordinary in most of the logs.
I do see some 30v and 40v on the ve bus but the battery still saysit is around 53v. This by itself could point to a disconnect between the battery and the system. (Some batteries read voltage before their disconnect. So if you measure the terminals it shows less.) but the apl reads fine.
Battery temp is shown at 7°C.
Wondering if that is not part of the issue here it is disconnecting but the battery is not communicating that it is an issue and just disconnecting?
Alternatively you have a disconnect in the system that is being affected by temperatures? Of course i have no idea what environment the equipment is in. I am sure you can evaluate for yourself there.