I have a BMV-712 and a 200aH AGM battery. This last weekend, I was boondocking for the first time and studying the 712 closely. I noticed that it displayed the SOC as 70% when the battery voltage was 12.0 volts. According to everything I've read, that would be a SOC of < 50%. Do I have a setting incorrect? Or is there something I am not aware of?