Hello, I have a question dealing with battery voltage. My Explorer has a Battery Management System. My battery voltage stays around 12.9 to 13 volts but when I turn things on like A/C it jumps up to 13.7 volts. When I run the total scan I have no faults. When I check the battery in the system it shows its to hold between 10 and 16 volts... is their a way to set the volts to maintain at 14.4 at all times while the SUV is running?

 It is a smart changing system. My alternator is new, battery is new. Replaced them both due to them going bad. When I first start the SUV in the morning I have around 14.2 volts of power. After a while it drops down to 12.9 to 13 volts. I run a sound system and would like to keep the volts up around 14.4 to 14.8. I am wondering can I program that into my vehicle with my device, the MaxiCOM MK808BT? To bypass the smart charging system so I can have continued 14.4v of power.

 Ok, so I have been somewhat perplexed by this. I'm only ever getting 12.9 to 13 volts after warmup. I have gone through and looked at the live data from the body control module. When looking at the live data when the car is running, the Battery Monitor/ Regenerative Charge State always remains "Inactive". So my batteries and not getting properly charged? I'm new to this with little knowledge of the sort, I just feel like something is not right, I have always had a charge state of around 14.2 volts and now I can't get above 13.