RV Generator Size Calculator

Calculate your RV generator requirements by entering your appliances and devices below.

List of the Top 10 Best Generators for RV:

# Image Product Link
1 Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator, Transfer Switch Ready 30A Outlet, RV Ready 30A Outlet, CO Sensor Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator, Transfer Switch Ready 30A Outlet, RV Ready 30A Outlet, CO Sensor View on Amazon
2 Westinghouse Outdoor Power Equipment 4000 Peak Watt Super Quiet Dual Fuel Portable Inverter Generator, Remote Electric Start, Gas & Propane Powered, RV Ready, CO Sensor, Parallel Capable Westinghouse Outdoor Power Equipment 4000 Peak Watt Super Quiet Dual Fuel Portable Inverter Generator, Remote Electric Start, Gas & Propane Powered, RV Ready, CO Sensor, Parallel Capable View on Amazon
3 Westinghouse 2550 Peak Watt Super Quiet & Lightweight Portable Inverter Generator, RV Ready 30A Outlet, Gas and Propane Powered, CO Sensor, Parallel Capable, Long Run Time Westinghouse 2550 Peak Watt Super Quiet & Lightweight Portable Inverter Generator, RV Ready 30A Outlet, Gas and Propane Powered, CO Sensor, Parallel Capable, Long Run Time View on Amazon
4 WEN 3600-Watt Portable Inverter Generator, RV-Ready, Quiet and Lightweight with Fuel Shut Off (56360i) WEN 3600-Watt Portable Inverter Generator, RV-Ready, Quiet and Lightweight with Fuel Shut Off (56360i) View on Amazon
5 Westinghouse Outdoor Power Equipment 5000 Peak Watt Super Quiet Portable Inverter Generator, Remote Electric Start with Auto Choke, Wheel & Handle Kit, RV Ready, Gas Powered, Parallel Capable Westinghouse Outdoor Power Equipment 5000 Peak Watt Super Quiet Portable Inverter Generator, Remote Electric Start with Auto Choke, Wheel & Handle Kit, RV Ready, Gas Powered, Parallel Capable View on Amazon
6 Champion Power Equipment 4000-Watt RV Ready Portable Inverter Generator with Quiet Technology and CO Shield Champion Power Equipment 4000-Watt RV Ready Portable Inverter Generator with Quiet Technology and CO Shield View on Amazon
7 Westinghouse Outdoor Power Equipment 12500 Peak Watt Home Backup Portable Generator, Remote Electric Start with Auto Choke, Transfer Switch Ready 30A & 50A Outlets, Gas Powered Westinghouse Outdoor Power Equipment 12500 Peak Watt Home Backup Portable Generator, Remote Electric Start with Auto Choke, Transfer Switch Ready 30A & 50A Outlets, Gas Powered View on Amazon
8 MaXpeedingrods 3500 Watt Portable Inverter Generator Gas Powered, EPA Compliant, Compact and Lightweight for Home Backup Power, Outdoor Camping, RV and Trailer MaXpeedingrods 3500 Watt Portable Inverter Generator Gas Powered, EPA Compliant, Compact and Lightweight for Home Backup Power, Outdoor Camping, RV and Trailer View on Amazon
9 WEN DF451i Super Quiet 4500-Watt Electric Start Dual Fuel RV-Ready Portable Inverter Generator with Fuel Shut-Off WEN DF451i Super Quiet 4500-Watt Electric Start Dual Fuel RV-Ready Portable Inverter Generator with Fuel Shut-Off View on Amazon
10 DuroMax XP13000E Gas Powered Portable Generator-13000 Watt Electric Start-Home Back Up & RV Ready, 50 State Approved, Blue/Black DuroMax XP13000E Gas Powered Portable Generator-13000 Watt Electric Start-Home Back Up & RV Ready, 50 State Approved, Blue/Black View on Amazon

Complete Guide to Choosing an RV Generator

How to Choose a Generator for Your RV?

1. Determine Your Power Requirements

  • List all appliances you plan to use
  • Consider both running and starting watts
  • Account for simultaneous usage patterns
  • Factor in future power needs
  • Consider altitude effects on generator performance

2. Consider Generator Types

Type Best For Pros Cons
Conventional Portable Budget-conscious users, high power needs
  • Lower cost
  • Higher power output
  • Simple maintenance
  • Noisier operation
  • Less fuel efficient
  • Bulkier size
Inverter Generator Electronics-heavy usage, quiet campgrounds
  • Clean power output
  • Quiet operation
  • Fuel efficient
  • Higher cost
  • Limited max power
  • More complex repairs
Built-in/Onboard Luxury RVs, full-time RVers
  • Integrated fuel system
  • Automatic operation
  • Weather protected
  • Highest cost
  • Professional installation required
  • Permanent installation

3. Fuel Type Considerations

Fuel Type Advantages Disadvantages Best For
Gasoline
  • Readily available
  • Lower initial cost
  • Familiar fuel type
  • Short shelf life
  • More maintenance
  • Storage concerns
Occasional users, shorter trips
Propane
  • Unlimited shelf life
  • Cleaner burning
  • Often available at campgrounds
  • Slightly less power
  • Tank storage needed
  • Higher fuel cost
Extended trips, cold weather use
Dual Fuel
  • Fuel flexibility
  • Backup fuel option
  • Versatile usage
  • Higher cost
  • More complex system
  • Additional maintenance
Full-time RVers, longer trips

Key Features to Consider

1. Noise Level

  • Quiet operation (50-60 dB) for campground compliance
  • Consider inverter technology for reduced noise
  • Check campground noise restrictions

2. Portability

  • Weight and size for storage
  • Wheel kit availability
  • Handle design for movement

3. Runtime

  • Fuel efficiency ratings
  • Tank size considerations
  • Eco-mode availability

4. Power Quality

  • Total Harmonic Distortion (THD)
  • Voltage regulation
  • Surge protection

Common RV Appliance Power Requirements

Appliance Running Watts Starting Watts
RV Air Conditioner (13,500 BTU) 1500 3500
RV Air Conditioner (15,000 BTU) 1800 4000
Microwave Oven 1000 1000
Electric Water Heater 1500 1500
Coffee Maker 600 600
Refrigerator 400 1200
TV/Entertainment System 300 300

Frequently Asked Questions When Choosing an RV Generator

What size generator do I need for my RV?

Size requirements depend on your power needs. Generally:

  • Small RV (basic needs): 2000-3000 watts
  • Medium RV (with AC): 3000-4000 watts
  • Large RV (full amenities): 4000-7000 watts
  • Luxury RV (multiple ACs): 7000+ watts

Can I run my RV AC with a generator?

Yes, but you need to ensure:

  • Generator has sufficient starting watts (typically 2-3 times running watts)
  • Proper sizing for altitude operation
  • Adequate surge capacity for AC compressor start

Should I choose an inverter generator?

Inverter generators are recommended if you:

  • Use sensitive electronics
  • Camp in noise-restricted areas
  • Value fuel efficiency
  • Need clean, stable power

What about parallel capability?

Parallel capability allows you to:

  • Connect two smaller generators for more power
  • Provide flexibility in power needs
  • Share load between units
  • Add capacity as needed

Maintenance Considerations

Regular Maintenance Schedule

Interval Tasks
Every Use
  • Check oil level
  • Clean air intake
  • Inspect fuel lines
Monthly
  • Test run if not used
  • Check battery connections
  • Inspect exhaust system
Annually
  • Change oil and filter
  • Replace air filter
  • Clean/replace spark plugs

Safety Tips

  • Proper Ventilation: Always operate outdoors or in well-ventilated areas
  • Carbon Monoxide Safety: Install and maintain CO detectors
  • Fuel Storage: Follow proper fuel storage guidelines
  • Regular Inspection: Check for fuel leaks and damaged components
  • Grounding: Ensure proper generator grounding
  • Weather Protection: Use appropriate covers and shields