Portable Generator Size Calculator

Portable Generator Size Calculator

Here’s a comprehensive table summarizing all you need to know about portable generator sizes:

Generator SizePower OutputTypical UsesFuel TypeRun TimeNoise LevelWeightSuitable For
Small (1000-3000W)1000-3000WCamping, tailgating, small appliancesGasoline, Propane4-8 hours50-60 dB20-60 lbsRecreational use, small power tools
Medium (3000-5000W)3000-5000WRVs, small homes, power toolsGasoline, Propane, Dual Fuel8-12 hours60-70 dB100-150 lbsEmergency home backup, construction sites
Large (5000-9000W)5000-9000WLarger homes, multiple appliancesGasoline, Propane, Dual Fuel8-12 hours70-80 dB150-250 lbsWhole house backup, job sites
Extra Large (10000W+)10000W+Large homes, commercial useGasoline, Diesel, Propane10-16 hours70-85 dB250+ lbsWhole house backup, industrial use

Additional considerations:

  1. Starting watts vs. running watts: Ensure the generator can handle both12.
  2. Fuel efficiency: Larger generators consume more fuel6.
  3. Portability: Consider weight and wheels for mobility2.
  4. Inverter technology: Cleaner power for sensitive electronics24.
  5. Parallel capability: Some models can be connected for increased power2.
  6. Safety features: Look for low-oil shutoff, circuit breakers, and GFCI outlets12.
  7. Maintenance: Regular oil changes and proper storage are crucial1.
  8. Local regulations: Check noise ordinances and permit requirements13.
  9. Future needs: Consider potential power increases when sizing46.
  10. Professional advice: Consult an electrician for precise sizing, especially for whole-house backup346.

Remember to calculate your power needs accurately by listing all devices you plan to run simultaneously, including both starting and running wattages.

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