RV generators come in different sizes, fuel sources, and portability. They typically use the same fuel as the RV’s engine and can be built-in or portable. The generator’s size and power output depend on the RV’s capacity and number of appliances. LPG generators can be directly connected to the RV’s LP system, while portable generators can be used for supplemental power.
RV generators can be grouped according to a variety of different factors, such as size, generating capacity, fuel source, and whether they are portable or built-in. The three main fuel sources for motorhome generators are gasoline, liquefied petroleum gas (LPG), and diesel. In most cases, a motorhome generator will use the same type of fuel as the motorcoach engine so they can share a storage tank. Built-in generators are usually connected to the motorhome’s electrical system and often have automatic switchover capability if the bed is connected to shore power. Portable generators can sometimes be connected to the electrical system, although it is often easier to use these units to directly power individual appliances.
The size and power output of a motorhome generator often corresponds to the length and capacity of the recreational vehicle (RV) because more people and appliances may require more power. Small motorhome generators often produce around 2kW, and large units can produce 13kW or more. The amount of power the generator is capable of producing is directly related to the number of appliances it can run at one time. Some very large motorhomes have three air conditioning (AC) units and a variety of other appliances that can run at the same time with a heavy-duty generator set.
Most motorhome generators use the same type of fuel as the engine that runs the motorhome. This allows the generator to draw fuel from the same tank as the engine. The generator intake is often at a higher level in the tank than the engine intake, which can prevent the generator from draining all the fuel.
Since motorhomes often have a liquid petroleum (LP) tank to run the stove, refrigerator, and water heater, some RVs have built-in LPG generators. These generators can be directly connected to the LP system in the same way that a diesel or gasoline unit can draw fuel from an existing tank. LP generators are also sometimes useful on travel trailers and fifth wheels because those RVs usually lack gas tanks but have LPG on board for cooking and heating.
It is also possible to get RV portable generators for supplemental power or use in equipment that lacks a built-in unit. These small generators are often rated at 2kW or less, although some can be chained together to deliver larger amounts of power. RV portable generators sometimes have receptacles to plug into the RV’s electrical system, although they can also be used to power individual appliances. Built-in motorhome generators are often expensive or difficult to repair or replace, so portable units can be a viable option in many circumstances.
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