RV Generator Buying Guide

Your recreational vehicle is a space of freedom and inspiration, but to truly power that experience, you need the right foundation: a reliable RV generator. Choosing the best RV generator comes down to proper sizing and reflecting on how you plan to use it.

Do You Need an RV Generator?

If your RV is your home away from home, equipped with modern amenities like a refrigerator, air conditioning, and a microwave, a generator is crucial for uninterrupted comfort.

While some campsites offer "shore power," relying solely on external hookups limits your adventure. An RV generator ensures independence, allowing you to explore off-the-beaten-path destinations without sacrificing any of your onboard luxuries. Don't squander the investment in your modern RV; equip it with a power source that matches its capabilities.

Built-in vs Portable RV Generators

The first critical step is deciding between an integrated, built-In RV generator and a versatile portable RV generator. This choice often comes down to the size of your vehicle and your approach to maintenance.

For owners of larger motor coaches with dedicated compartments, a built-in model offers the most seamless experience. For those with smaller campers or a desire for simpler maintenance and access, a quality portable unit provides the necessary power and flexibility.

What Size Generator Do I Need for My RV?

To determine the best size generator for your RV, you must determine both the physical and electrical needs of your project.

Step 1: Physical Fit

Always begin by measuring the dimensions of your generator compartment (if you are choosing a built-in model). Even the most powerful generator is useless if it doesn't physically fit into your vehicle.

Step 2: Electrical Output (Wattage)

To ensure enough power, you need to calculate the minimum starting wattage required for everything you plan to run simultaneously.

• Identify Appliances: List every electrical item you will run at the same time (e.g., A/C, microwave, refrigerator, coffee maker).
• Determine Starting Wattage: Use the starting wattage for each item, as this is the highest draw, particularly for items with motors like your air conditioner (often the single largest power consumer).
• Calculate Total Load: Sum the starting wattages of all simultaneous items.
• Add Your Buffer: We recommend adding at least 20% to your maximum calculated load. This ensures your generator is not constantly running at full capacity, promoting longevity and reliability.

Expert Insight: Many buyers ask how to size a generator for a "50-amp RV" or "30-amp RV." This is a misleading approach. Start with your actual appliance wattage needs first and let that guide your generator selection. A 50-amp RV requires a 12,000-watt generator to power everything at 240 volts and a 6,000-watt generator at 120 volts. Your RV may not have enough physical space to contain that large of a generator. That's why you should always start with physical dimensions and then determine how much power you really need at one time by adding up the wattages.

RV Generator Fuel Type Considerations

Matching your fuel source is key to a frictionless experience. Built-in RV generators typically run on gasoline, diesel, or propane and are hardwired to draw fuel directly from your main RV tank until it hits a reserve (usually a quarter tank).

If you opt for a portable unit or have a towable camper, your options expand:

• Propane: A great choice for towables that lack an onboard fuel tank, as it burns clean and stores indefinitely.
• Dual-Fuel: Available in many portable units, this offers the flexibility to switch between gasoline and propane, an ideal option for maximizing run-time and availability while on the road.

EPA Regulations for Gas RV Generators

According to the Environmental Protection Agency (EPA), gas fumes produced inside the tanks of built-in RV generators must be captured and returned to be burned. This has led to the manufacturing of EVAP generators that are specially designed to meet these regulations.

Typically, motorized RVs already have a built-in system that complies with these regulations, but most tow-behinds don't. The towable RVs require the installation of an EVAP generator, a certified hose, special fittings, a specially designed metal tank, and a carbon canister.

If your built-in system is missing any one of these certified EVAP components, you'll be subject to a hefty fine should you get stopped and inspected. So, unless your gas RV generator pulls its fuel from the chassis fuel tank, you'll want to be sure you're compliant on the roadway so you don't get stuck with a major fine.

Enjoy the Outdoors

At the end of the day, choose an RV generator that suits your needs and won't interfere with enjoying your trip. Focus on embracing the great outdoors and making every day an adventure.