Portable Electric Generators

Another way to feed 120-volt power into the RV is from an onboard portable electric generator. A generator is very standard equipment in many RVs, but is not as common in most trailers. When camping away privately from all the convenient hookups, a generator is really the only way to power-up all the larger equipment you have onboard. Many generators run on gas, although some even use diesel or propane. For the most part, RV generators run off the very same fuel source as the main motor. However, should they share the some fuel with the engine, the generator will most likely shut itself off when the gas level falls to one-quarter of a tank, so it that it won't cause the vehicle to run out of gas. So keep in mind that it is always a great idea to look ahead and fill your tank beforehand when you are planning to use the generator.

A gallon of gasoline or diesel fuel will generally keep a generator going for around two hours - so calculate this as a rule of thumb.  A generator should always be started and allowed to run for a minute or two before turning on any 120-volt appliances. A generator can also be used while a motor home is traveling. When you think about it, trying to cooling down a larger motor home on the go by using the dashboard air conditioner is just about impossible in very hot weather. So the generator can be used to run the main air conditioner inside the coach.

What About Watts? 

The power output of a generator is measured in watts. Know the output of your generator and guard against exceeding it. If you use too many 120-volt appliances and exceed the generator's capacity, you'll trip a circuit breaker (just like at home in the stick-built house.) Most large onboard generators put out between 4,000 and 7,500 watts.. .some higher on big rigs. Small motor homes can have generators with a power output of 2,000 to 3,000 watts. When in doubt, check the owner's manual of your generator and of any major appliances to be able to monitor usage. Amp or watt draw is usually listed.

Some great thing to remember about a portable electric generator.  They are great to have, but they must be taken care of.