OK, welcome to RVing!
1. all outlets on the wall are 110v and only work if you're plugged into an electrical outlet (shore power).
2. Stove and furnace only work off propane. The fan blower for the furnace works off of 110V shore power or 12v DC battery.
3. AC only works when plugged in to shore power.
4. All lights inside are 12 v and will work on the battery, when you're hooked up to the tow vehicle, and when you're plugged in to shore power. there is a 110v AC to 12v DC converter in your unit which provides the step down voltage.
5. Refirdgerator works off 110v shore power first. When that's not available, it runs on propane. Doesn't work off the battery.
6. Water heater works off 110v shore power first. When that's not available, it runs off of propane. Doesn't work off the battery.
7. all your electric tongue jack, stabilizer jacks, awning (if your unit is equipped with electric ones) operate off of shore power and battery.
8. Water pump operates off of 110v shore power & 12v DC battery, When you're not hooked up to a water source, you have to fill your fresh water tank and run both the water pump and the water heater (if you want hot water).
9. Slides will operate off of 110V shore power and 12v battery or tow vehicle hook up. If only on battery, the slides require a lot of juice so make sure your battery is fully charged.
10. Microwave only works off of 110 V shore power
That pretty much covers most units, hope this is of some help.
Mark, Vicki, & Scout THE dog
2015 Hemisphere 282RK
2010 F250 Super Duty
1992 Goldwing Aspencade