Travel Trailer Generator Size Calculator
Here’s a comprehensive table summarizing all you need to know about generator sizes for travel trailers:
| Travel Trailer Size | Electrical System | Typical Appliances | Recommended Generator Size | Notes |
|---|---|---|---|---|
| Small (under 20 ft) | 30 amp | Lights, water pump, charging devices | 2,000-3,000W | Portable inverter generators are ideal |
| Mid-size (20-30 ft) | 30 amp | Above + microwave, small AC | 3,000-4,000W | Consider inverter or standard portable generators |
| Large (30-40 ft) | 30 or 50 amp | Multiple ACs, larger appliances | 5,000-7,500W | Standard generators recommended |
| Luxury (over 40 ft) | 50 amp | Multiple ACs, full-size appliances | 10,000-13,000W | Diesel generators often used |
| With 13,500 BTU AC | – | Single AC unit | 3,000-3,500W | Ensure generator can handle starting surge |
| With 15,000 BTU AC | – | Single AC unit | 3,500-4,000W | Higher wattage needed for larger AC |
| Running 2 AC units | 50 amp | Two 15,000 BTU ACs | 6,500-8,000W | Account for other appliances as well |
| Dry camping / Boondocking | – | Essential appliances only | 2,000-4,000W | Depends on comfort level and usage |
Key Considerations:
- Calculate total wattage of all appliances you plan to run simultaneously12.
- Add 20% to your total for safety margin1.
- Consider both running watts and starting watts of appliances3.
- For high altitudes, generators may lose 3% power per 1,000 ft elevation3.
- Inverter generators are quieter and more fuel-efficient for smaller needs2.
- Parallel capability allows connecting two smaller generators for more power2.
- Always consult with an electrician for precise sizing, especially for larger setups14.
Remember, the right size depends on your specific needs, usage patterns, and the appliances in your travel trailer. It’s better to have slightly more capacity than you think you’ll need to account for unexpected power demands.