Depends on the rate per KWH and how many heaters you need to run. For most RVs, 2-3 1500 watt heaters are close to the output their LPG furnace; larger RVs it can be several more.
I'm in a place where electrity comes from coal-fired thermal plants and the coal has to come from West Virginia or Wyoming. We are sitting on top of oil wells that produce gas liquids, so burning LPG is usually cheaper, if electricity is billed on usage rather than "free" which means you've paid for it whether you use it or not.
Resultsfor you will depend on relative costs for energy where ever you are.
