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I have a the Victron Energy MultiPlus 3000VA 12-Volt Pure Sine Wave Inverter and 120 amp Battery Charger, Today the voltage and amps keep going up and down, even if I turn of the power to battery
I have had this installed and working from the middle of November, I have unplugged the cat5 cable the had the dongle plugged to it, any suggestions to fix this ?
@Sprinter2023 I am guessing your batteries are Lithiums with an internal BMS. If that is the case, I suggest you may lower your absorption charge voltage and see if you can settle down the BMS. If the batteries are not lithium, that is a different matter.
The BMS is turning the batteries off as one cell is going over its max limits. - to help stop the issue - reduce the Absorption voltage to say 13.7 or lower if needed to stop the on off issue that the BMS is doing - then look at the cell voltages of your batteries and slowly adjust the voltage up as the high cell voltage reduces . max cell voltage would be around 3.65v on any one cell. another way is to use the DVCC in the gx unit and reduce the charge amps to 1 or 2 amps and see if that brings it under control. once the total volatge gets to 14.2 then you should again slowly raise the volatge to 14.5 or until all cells are close to 3.65 then reduce the volatge back to norma SETTINGS
This points to unbalanced cells
ps IT MAYBE better to play with the DVCC and reduce the max charge amps this maybe easer as the adjustement can be done in the GX unit under DVCC
would the bms affect the inverter/charger when i turn off the battery disconnect
