Recently added a 100AH Battleborn LiPo4 battery to my camper. Purchased a battery/victron BMV-712Smart package. wired into P/N busbars with the shunt between N busbar and the battery negative. The 712 monitor seems to work fine when not connected to shore power, but gradually reports lower SOC until SOC is now 0%, while the battery voltage continues to be above 13.60.