RV Generator Size Calculator

Find the perfect portable or onboard generator for your RV. Sum up the starting and running watts of your appliances to get your required sizing.

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RV 30 Amp vs 50 Amp Generators

30 Amp Service

Common in smaller trailers and Class C RVs.

  • Maximum Watts: 3,600W (120V x 30A)
  • Recommended Generator: 3,500W to 4,000W
  • Capacity: Typically runs 1 AC unit plus minor appliances.

50 Amp Service

Common in larger 5th wheels and Class A Motorhomes.

  • Maximum Watts: 12,000W (2 legs of 120V x 50A)
  • Recommended Generator: 5,500W to 12,000W+
  • Capacity: Can run 2 or 3 AC units simultaneously with other loads.

Quick Reference: RV Generator Size Chart

Typical generator requirements based on RV style and appliance load.

RV Type Electrical Service Recommended Watts What it can run
Teardrop / Pop-Up Camper 15 - 20 Amp 2,000W - 2,500W Tiny AC, lights, fan, TV, small electronics
Small Travel Trailer 30 Amp 3,000W - 3,500W 1x 13.5k BTU AC, microwave, fridge, lights
Mid-Size Trailer / Class C 30 Amp 3,500W - 4,500W 1x 15k BTU AC, microwave, TV, fridge, tools
Large 5th Wheel / Class A 50 Amp 5,500W - 8,000W 2x AC Units, heavy appliances concurrently
Luxury Coach / Toy Hauler 50 Amp 10,000W - 12,500W+ 3x AC Units, electric heaters, all luxury items

Recommended RV Generators

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Inverter
Generators

Quiet Power

3000W-4000W Inverters

Quiet and efficient. Perfect for running a standard 13.5k or 15k BTU AC unit on a 30-Amp rig.

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Dual Fuel
Generators

Versatile

Propane & Gas

Run on gasoline or propane. Propane is convenient, clean-burning, and easily accessible while camping.

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Best Seller

50-Amp
Heavy Duty

High Capacity

50-Amp Generators

Large open-frame or heavy inverter models, 6000W+. Needed for big 5th wheels with 2x ACs.

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Solar
Stations

Battery Power

Portable Power Stations

Silent, fume-free battery backup. Recharge via solar panels for indoor-safe & campground-friendly power.

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