Mike,
That is the main point of the MOC, members helping members learn and grow w/ their Montana's. Here is a link that will show the voltage meter I bought from my dealership. I am amazed at how the needle bounces around during the day.
http://www.campingworld.com/browse/s...29375&src=SRQB
Here is a link to a digital one. This one also measures frequency...
http://www.campingworld.com/browse/s...16036&src=SRQB
Hope this helps.