Need some of you smart electrical Guru's types to weigh in or refer me to some good links to send me to school.

My coach has 24 volt system for both the engine and the house batteries. Conveniently located on the dash are two combination gauges that show volts and amps for each circuit labeled: engine and house.

For a correctly functioning system:
Q1. What would be the nominal voltage engine voltage one should look for while underway? That is, being charged by the engine alternator/generator.
Q2. What would the normal voltage one should look for when the engine is off?
Q3. What would be the lowest voltage one should allow the voltage to drop to prior to charging?

Now, sorta the same questions for the house side:
Q4. Voltage while being charged?
Q5. Voltage while unplugged from shore power and not being charged?
Q6. Minimum voltage to drop to prior to charging?

One would sorta think reasonable voltages would be twice that of a 12 volt system but I am not sure. Also, one would think that the answers for questions 1,2, and 3 would be the same as questions 4, 5, and 6 but once again, I would be guessing.

Right now, I would like to know if what I am seeing is in the ball park:

Engine running:
engine and house gauges 27.5
engine off, ign on: 24.5V indicated on engine voltmeter
engine off, 26.5V indicated on the house gauge--plugged to shore power.


Once I break the code on this I will need to understand the whys and where fores of how and where 12 Volt sorces are picked from-radio, for instance.

Thanks in advance,

PS I also asked this question on another forum: rv.net

Wrong forum! Won't do that again. Some real butt holes on there besides me! But if you need a laugh or two:
http://www.rv.net/forum/index.cfm/fu...d/19654608.cfm