RV Generator Guide: Choosing Between Installed vs. Portable Power

Whether you’re upgrading your RV with an EV charger or preparing for off-grid adventures, selecting the right generator is crucial. Should you go with a built-in (installed) generator or a portable unit? The right choice depends on your RV class, energy needs, travel habits, and how much you value convenience, cost, and flexibility.

Here’s a full breakdown to help you decide:

RV Type & Power Needs

• Large Motorhomes (Class A & C): These rigs typically need more power—often 4,000 to 12,500 watts—to run multiple appliances at once (think A/C units, refrigerators, microwaves). Installed generators are a better fit here due to their integration and higher output.

• Smaller RVs & Towables: If you’re in a campervan, travel trailer, or fifth-wheel, a portable generator (2,000 to 4,000 watts) may be all you need for occasional use or light loads like lights, coffee makers, or an EV Level 1 charger.

Ease of Use & Setup

• Installed Generators: Start with the push of a button from inside your RV. No setup. No fueling each time. These units can even run while you’re driving—ideal for keeping things cool on the road.

• Portable Generators: Require manual fueling and setup each time. You’ll also need to store, lift, and secure them outside, which can be a hassle in bad weather.

Maintenance & Accessibility

• Installed Units: More challenging to access for maintenance. Repairs might require a service visit and higher costs.

• Portable Units: Easy to maintain, service, or replace. Many RV owners enjoy the DIY convenience of servicing their portable units.

Versatility

• Installed Generators: Designed solely for RV use, built directly into your rig.

• Portable Generators: Can double as a backup power source for your home, job site, or outdoor events—making them more versatile beyond RV life.

Fuel Type & Management

• Installed Systems: Pull fuel directly from your RV’s tank (gas or diesel), eliminating extra containers. However, extended use may reduce your driving range.

• Portable Units: Run on separate fuel (gas, propane, or diesel), which means carrying and safely storing extra fuel.

Noise Levels

• Built-in Generators: Typically quieter due to being enclosed and insulated inside the RV compartment—ideal for campgrounds with noise rules.

• Portable Generators: Can vary in volume. Inverter models are quieter but still often louder than onboard systems.

Cost Consideration

• Installed Generators: Come with higher upfront and installation costs but provide seamless power delivery and added comfort.

• Portable Generators: More budget-friendly, but may fall short on power for larger RVs or full-time users.