How to Pick the Perfect RV Generator

If your RV or camper comes with a built-in generator compartment, opting for a built-in RV generator is the optimal choice. These installed generators are hardwired into your vehicle's electrical system and are typically started by the battery. Fuel is sourced directly from your RV's fuel tank, eliminating the need to refill a separate fuel tank, especially during inclement weather.

RV generators are indeed high-powered, typically providing at least 3,000 watts of power. They often feature push-button start functionality from inside the vehicle, eliminating the need for manual setup. Additionally, many models are equipped to automatically adjust performance to accommodate high elevations, making them ideal for camping in mountainous regions like the Rockies.

For owners of large Class A or Class C motor coaches, built-in generators are undoubtedly superior, as small portable units may struggle to power all the appliances and amenities onboard. While it's possible to use a large, open-frame portable generator, these units can weigh hundreds of pounds and produce considerable noise, making them less practical for many RV owners.

Built-in generators do have some drawbacks. They can be challenging or costly to access, maintain, and repair compared to portable units. Since they are housed inside the RV, it's essential to install a CO alarm to detect any potential malfunctions, despite the exhaust venting outside. Additionally, it's advisable to keep windows shut when the generator is running to prevent exhaust from seeping back into the RV.

Portable generators indeed alleviate some concerns since they are typically situated several feet away from your RV and offer easier access and maintenance. However, their smaller output and manual operation make them more suitable for smaller Class B RVs or towable campers that lack their own built-in fuel source.

The following table outlines the main distinctions between built-in and portable generators:

Regardless of whether you opt for a built-in RV generator or a portable RV generator, the crucial step is to ensure proper sizing.

What Generator Size Do You need for Your RV?

To properly size an RV generator, you must consider both its physical dimensions and electrical output.

1. Ensure that the generator fits into your RV's designated compartment by taking accurate measurements.
2. Calculate your power requirements by calculating the starting wattage of all appliances you plan to run simultaneously. This total represents the minimum wattage needed.

Notably, air conditioning units typically have higher starting wattage requirements than running wattage. Therefore, the number of air conditioners in your RV significantly influences your power needs.

Below are examples of common appliances along with their average wattages:

Let's say you aim to operate an RV fridge, a microwave, a portable fan, a small tube TV and a coffee maker all at the same time. Adding up their starting wattages yields 2,620 watts. Therefore, any generator you choose must be capable of handling at least this amount of power.

To simplify this process, Click Here To Access Honda's Wattage Calculator

It's advisable to add about 20% to your maximum load to ensure your generator isn't constantly running at full power, which can lead to excessive wear. In our example, opting for at least a 3,200-watt generator would be prudent. If you anticipate needing to power even more items in the future, factor that into your calculations.

When determining generator size for a 50-amp RV or a 30-amp RV, focusing solely on amperage isn't the most effective approach. A 50-amp RV, for instance, requires a 12,000-watt generator to power everything at 240 volts, or a 6,000-watt generator at 120 volts. However, it's crucial to consider whether your RV has adequate physical space to accommodate such a large generator. Therefore, it's best to start by assessing physical dimensions and then determine the necessary power output based on your wattage requirements.

EPA Regulations for Gas RV Generator

In accordance with regulations from the Environmental Protection Agency (EPA), gas fumes generated inside the tanks of built-in RV generators must be captured and recycled for combustion. Consequently, manufacturers have developed EVAP generators specifically designed to comply with these regulations.

Typically, motorized RVs come equipped with a built-in system that adheres to these regulations. However, most towable RVs do not. To ensure compliance, towable RVs require the installation of an EVAP generator, along with certified hoses, special fittings, a specially designed metal tank, and a carbon canister.

If any of these certified EVAP components are missing from your built-in system, you risk facing a substantial fine if stopped and inspected. Therefore, it's crucial to ensure compliance while on the road to avoid potential penalties.

Fuel Types For RV Generators

Built-in RV generators are typically fuelled by gasoline, diesel, or propane, and it's essential to match the fuel type with that of your RV. In most cases, built-in generators draw fuel directly from your RV's tank until it reaches a quarter full to prevent accidental depletion.

For towable campers lacking their own fuel source, a liquid propane generator may be preferable. Otherwise, choose the fuel type that offers the most economic sense for your location.

When selecting a portable generator, you have the option of dual-fuel generators, which can switch between gasoline and propane for added flexibility. However, keep in mind that portable generators require an external fuel tank that you'll need to manage.

Owners of gasoline-fueled RV generators should be aware of specific federal regulations, which we'll discuss in the following section.

Enjoy Your Experience

Ultimately, select an RV generator that suits your needs and enhances your trip without hindering your enjoyment. Prioritize embracing the beauty of the outdoors and transforming each day into an unforgettable adventure.