12 volt or 110 volt
I see how some folks add things like small fans or lights to existing ceiling lights and/or fixtures. If your travel trailer is plugged into the campgrounds pedestal full time do ya need a 12v or a 11...
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Certain items are 120VAC (or 110VAC) period, like the air conditioner and microwave oven. They won't run unless you have pedestal power or an elaborate inverter system (very rare). Certain items can take advantage of available 120VAC, like most RV fridges and many water heaters. Just about all other electrical in a typical travel trailer is 12VDC, even if you are plugged into that pedestal. Nearly all travel trailers have a converter that converts 120VAC to 12VDC, which is used to charge your battery(s) and power the lights, furnace, fans, etc.
