Alt voltage ?

At idle with nothing on voltage is at 13.95. Idle with radio, lights, ac on voltage is at 13.80. Driving with the lights, ac,radio, and cruise on 13.70 to 13.5, then when breaking it will momentarily drop too 12.07. Driving with nothing on 13.85 to 13.74. Are these the voltages in proper range of a healthy electrical system?

Except for the 1V drop whilst braking, it all sounds well within specs. I don't really understand why you get that 1V drop. I would expect it to creep down at idle if you are pushing a big sound system or something but just braking shouldn't cause that much of a drop.

I keep a scanguage hooked up in the RV to keep an eye on battery voltage while I'm driving since I have a very large power inverter hooked up. The only time the voltage drops is when stopped at a long stoplight or in stop-n-go traffic for a long time.