The starter battery reading on my BMV-712 is suddenly not accurate, having checked my starter battery voltage with a meter.
I have two 12V 300Ah lithium leisure batteries and one 12V lead acid starter which now has just started giving false over voltage readings of around +3V. I’ve checked the fuse on the lynx power in 1000 and it buzzes out ok. I discussed it with a Victron engineer who says there is an issue with this setup (lithium) and to just disconnect the connection to the shunt for the lead acid battery and accept that I won’t get a reading on BMV-712. Consequently I’ve had to disable the over/under voltage alarms and he says I need to fit another battery monitor just for the starter battery. This seems odd as it was doing just fine for eight months? Although the fuse buzzes out ok he says it may be worth replacing it just in case. I’m yet to do that. Ultimately, we’re users not installers!
Has anyone else come across this? Any advice/help would be appreciated. Thanks