Portable Generators

To find the correct generator size, take the air conditioner's surge or starting amp rating and multiply this by voltage. This will give you the wattage rating, which must meet or exceed your generator choice.

A 2,200-watt generator produces around 18 amps. Therefore, the start-up and running amps of the air conditioner cannot exceed 18. A larger generator is likely needed for a roof-mounted RV air conditioner.

A portable generator produces electricity with an internal combustion engine and alternator. The engine spins the alternator, which produces alternating current (AC) for devices like your RV’s air conditioner.

Portable generators are not meant for long-term continuous use; most will run anywhere from 8 to 16 hours, depending on fuel tank size, load, and efficiency.

The cost of a portable generator varies greatly based on several factors, such as size. Most 2,500-watt models start around $500 with 3,500-watt plus models exceeding $1,000.

Place your generator a safe distance away from the RV and check fluid levels. Start your generator and let warm. Turn off all appliances inside RV. Once warm, attach the RV and power on appliances.

The longevity of a portable generator depends on several factors including frequency of maintenance, quality, type of load, etc. If cared for properly, some units can last 10 years or longer.

No, in most circumstances, portable generators need not be grounded when hooked to an RV per NEC250.34.

Check fluid levels to ensure sufficient oil and fuel. Open the fuel valve to allow gas to flow from the tank to the carburetor. Engage the choke lever and start the engine. Once running, disengage, choke, and let idle for 5 minutes.