Originally Posted by sundog964
Welcome to the Forums.
Can't help you with the particulars of yours but others will chime in. Probably the best would be to post each question in the respective sub forum for more particular answers.
For mine, there are 3 modes, battery operation, shore power, and generator. And then there is an inverter on/off switch to turn some 110V plugs on. They are very few of those which will run off the battery. Then there is a generator switch, which turns on the generator, and switches automatically to that power source. Does yours have those switches?
This has it pretty well and there are lots of details that can confuse us and those details do vary from RV to RV, so we can't always say it works one specific way.
One step is to know exactly which Rv as each year has multiple models and lengths of RV, with the longer, more "delux" having far more complex wiring. So posting up the details on year, model and length like 35 F, etc. is a good way to cut out lots of things which don't happen on your RV but may on others.
For a quick view, I think of the electrical this way. Three sets, each having specific items they do on a "stand alone" basis but at times connecting to one or more of the other sets.
1. The 110 AC power comes form plugging into a power box (shore power?) OR from the generator when it runs. The choice can be as simple as where you plug in the cord, either to the shore power or some just plug into a receptacle coming from the generator. Lager, more elaborate may have an automatic transfer switch which changes the feed without you moving a plug.
The 110Ac will run the air conditioner, microwave and TV in most cases, as well as some portion of the regular 110 Ac outlets. It is also likely to feed power to a converter, which takes in AC and makes 12VDC to keep coach batteries charged. These coach battery then feed most of the 12VDC things
2. This 12VDC feeds most inside lights, vents fans and things that are not found on a normal car or truck. Where things can get confused is that this 12VDC also works things like the furnace thermostat, so it can make the 110 VAC air conditioner fail!
3. Then there is the 12VDC power that we find on the normal truck, like wipers, headlights, horn and outside clearance lights. But to confuse things, this system can also be tied together with the coach battery at times like to give the start battery a "boost" when we push a switch on the dash!
Lots of details, so cutting the confusion down to learn one system at a times will ease the stress levels a whole bunch.
First step is to find out which one you have!