Firstly, ensure the firmware is the latest. If the output battery is disconnected when this happens, then see page 25 in the manual on interpreting a higher V (Effects when a battery is disconnected) and also remote sensings topics. Please also post the device settings, all system components and readings taken with e.g. a multimeter at the various points in the system for readers to have something to work with. Also make sure equalisation is disabled until you have the manufacturer’s recommendations for your LA battery.