A number of your appliances require more than 120 volt to run adequately and reliable.
12 volt vs 120 volt. If by 12 volt switch you mean a smaller rocker type switch they are sometimes used to carry 120V. 120 Volt-Alternating Current AC. Comparing 12V Vs 24V Cons of Each.
The 12 V or low-voltage lighting system will actually be plugged into a transformer that is then plugged into your home electrical 120 volt socket for its power. A fully charged battery will operate the 12 volt equipment furnace water heater most lighting range hood monitor panel roof vent fans etc in your unit until the battery becomes discharged. If you adjust the input to get rated voltage at the lamp you get the same efficiencies.
A 120-volt light bulb can typically be screwed into an indoor light fixture and operate correctly without further complication. Swim pool inground lite - what is the reason for rating pool lights at 12 volts or 120 volts. If lower voltage supply is required it is possible to use a DC to DC converter.
148 volt drop 017739 ohms 12319 W add. I spoke with the Grand Design rep and he said they did a lot of testing before deciding to go 12 volt. Yes you can use a 120v switch for a 12v application.
12v is more energy efficient costing less in running costs. 120 volt is the same type of electricity you typically find in a home. We were just at the Hershey RV show and I saw the new Reflection 337 with a 12 volt residential Furion fridge.
A fully charged battery will operate the 12 volt equipment furnace water heater most lighting range hood monitor panel roof vent fans etc in your unit until the battery becomes discharged. The level of discharge for operation to cease will vary by each piece of equipment. The current flow through the 120 volt side of the transformer will still be perfectly balanced so the GFCI will never detect any problem with the circuit.

