I seem to be no closer to a solution or even an understanding of where the problem might be.
I've been connected to 30amp shore for 3 days. The Balmar SOC is 15% this morning and shows a voltage of 13.2. The BMPro and the solar controller show the same voltage. Meanwhile, the CombiMaster reads 13.5 volts but has been jumping around between 13.2 and 14 volts.
Again, I have no idea which device to believe and have no idea of the exact or even approximate SOC right now.
Unfortunately, I don't have access to a PC to connect to the CombiMaster, but I am attaching a screenshot of the smartshunt settings from the Bluetooth app. Does anything look off there?
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