Hello. Look at this picture. In 2 days a big drop in voltage. Only venus , bmv-712 and a ruter connectet. Batteryes is 8*150 amp. 11/11 was 12.6v12/12 was 12.25v. and today 10.3v
asked
Drop in voltage
Hi @Odd,
Now would be the time to get out the physical multimeter, or call a technician and begin to investigate where the drop in voltage is occurring.
Take a pen and paper, and mark down each of the values.
Start with with the individual cells of your batteries. Then the interconnections between them. Then the whole battery bank together at the take-offs to the DC bus. Then at the DC bus. Then at each of the accessories (BMV).
That should point you to the source of the issue.
How are you charging the system? How are you keeping your parallel batteries balanced?
Looking at that characteristic, I would predict a cell failure. Remove it from the bank, and re-balance all the remaining batteries individually.
