Fifth Wheel 50 Amp: What Size Portable Generator Do You Need?

When it comes to powering your fifth wheel RV, especially one with a 50-amp electrical system, choosing the right size portable generator is crucial. Whether you’re planning to go off-grid, attend a boondocking festival, or just want a reliable backup power source, a portable generator can keep your comforts running smoothly. But fifth wheel 50 amp what size portable generator do you really need to power a 50-amp fifth wheel effectively?

Understanding a 50-Amp RV Electrical System

First, it helps to understand what a 50-amp system actually entails. A 50-amp RV plug typically provides 120/240 volts with two hot wires, each capable of delivering up to 50 amps. That means your RV can draw up to 12,000 watts of power (50 amps x 120 volts x 2 lines).

However, most RVs don’t need the full 12,000 watts running at all times. The actual demand depends on what appliances and systems you plan to use simultaneously — such as air conditioners, microwaves, water heaters, and entertainment systems.

Minimum Generator Size for a 50-Amp Fifth Wheel

Technically, to match the full potential of a 50-amp RV system, you would need a 12,000-watt (12kW) generator. However, that size of generator is large, heavy, and often overkill unless you're planning to run everything at once — including multiple A/C units, electric water heaters, and kitchen appliances.

In reality, many fifth wheel owners find that a 6,500 to 8,000-watt generator is sufficient for typical usage. Here's a quick breakdown:

• 6,500 Watts: Can handle one A/C unit and a few other essentials. Great for moderate power use.
• 7,500–8,000 Watts: Offers more flexibility and can power two A/C units if you’re careful about what’s running at the same time.
• 10,000+ Watts: Ideal for full-power use and running nearly everything in your RV simultaneously.

Dual Generator Setups (Parallel Generators)

Another popular solution is using two smaller generators in parallel. For instance, two Honda EU2200i or Champion 3500-watt inverter generators can be connected using a parallel kit to effectively double the wattage. This setup can provide 4,400 to 7,000+ watts, depending on the units used.

Parallel generator setups offer flexibility, quieter operation, and are easier to transport than a single large unit. However, they might not provide true 240V output, which some 50-amp RV systems may require for specific appliances.

Inverter vs. Conventional Generators

For RV use, inverter generators are generally preferred. They produce cleaner power, which is safer for sensitive electronics like laptops, TVs, and microwaves. They’re also quieter — a huge plus in campgrounds or natural settings.

Conventional generators tend to be louder but offer more wattage for the price. If noise and clean power aren’t as critical, a conventional 8,000 to 10,000-watt generator may fit your budget better.

Fuel Type and Runtime

Don’t forget to consider fuel type and runtime when choosing your generator. Gasoline is widely available, but dual-fuel (gasoline and propane) or even tri-fuel (gas, propane, and natural gas) generators offer more flexibility.

Look for a generator that provides at least 8-10 hours of runtime at 50% load, especially if you’re planning extended off-grid stays.

Final Thoughts

So, what size portable generator do you need for a 50-amp fifth wheel? The answer depends on your power usage and lifestyle. While a 12,000-watt generator covers all bases, most RVers find a well-chosen 7,500 to 8,000-watt generator or a dual inverter setup sufficient for their needs.

Carefully assess your appliances, consider inverter vs. conventional models, and look for a balance between power, portability, and noise. With the right generator, your fifth wheel experience can be just as comfortable off-grid as it is plugged into shore power.