We have recently installed a BMV712 on a syndicate owned boat and I am trying to understand what it is telling me. The boat has two 12 v Victron 220Ah batteries wired in parallel. He last discharge and average discharge have been showing 0Ah, so I have just changed the Charged Voltage setting from the default 13.2 v to 13.5 v hoping that this will give more information before resetting.
The thing that really puzzles me is that the Deepest discharge is shown as -543Ah and min battery voltage 4.17v, although the number of full discharges is showing as 0.
I don’t know what other syndicate owners have been doing with he boat but can these readings be right? I don’t understand how the deepest discharge can be -543Ah when I understand the maximum battery capacity to be 440Ah. Also, how the min battery voltage can have got to 4.17v when there is no indication of no full discharge.
Can anyone please advise if I am misinterpreting the data and, if not, whether I need to have serious words with the other syndicate members bout how they are treating the batteries?