Coachmen Starting Battery
We recently purchased a 2013 Coachmen Mirada motorhome. My question has to do with the coach starting battery. We spent a couple months in AZ and I noticed that when we arrived my starting battery was at approximately 12.7 volts. But noticed that it went down to approximately 12.3. Since we were plugged into power, I thought my starting battery would charge just like the coach batteries. Currently our motorhome is in the shop for a couple other repairs, But i need to know if this is an item that I need them to look at. Any info would be greatly appreciated.