I have a 2021 Dynamax Isata 5. I have 3 lithium batteries. My BMV-712 screen occasionally goes off and occasionally comes back on. Typically within a few hours or a day. I have wiggled wires at the shunt to see if there was a wire not making a connection as well as wiggled the wire behind the monitor. Everything is connected and it used to work just fine. I purchased it from a dealer in Florida and I live in Colorado so going back to the dealer is not an option. What do I do next? I'm a very handy person so me doing the testing or replacement is not a problem.
