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Generac GP3000i vs GP3500iO - The Differences

Further down the page, you'll find some explanations regarding the key similarities and differences between the Generac GP3500iO and the Generac GP3000i.

But before checking out explanations regarding their power, portability, and features, here's a table that summarizes the main pros of each of these 2 generators:

Generac GP3500iOGenerac GP3000i
Generac GP3500iOGenerac GP3000i
  • Higher running & starting watts
  • Higher runtime
  • Data center
  • Bigger engine
  • Lower fuel consumption
  • Lighter
  • Handle
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As the GP3500iO and the GP3000i are both Generac generators, they benefit from the same level of quality and attention to detail.

Power Comparison

The following charts are provided to show you at a glance how the main specs of the Generac GP3500iO compare to the Generac GP3000i.

  • Engine: The 212cc engine of the GP3500iO is significantly bigger than the GP3000i's engine, which has a displacement of 149cc.
  • Power: With a running wattage of 3000 W, the Generac GP3500iO will allow to power more appliances and tools than the 2300 running watts of the Generac GP3000i. Moreover, compared to the 3000 starting watts of the GP3000i, the GP3500iO and its starting wattage of 3500 W will give more power to start the appliances which require an additional boost to get their motor running.
  • Runtime: When loaded to 25% of their max capacity, the GP3500iO offers a higher runtime on a full tank than the GP3000i: it can operate for up to 11 hours, whereas the GP3000i offers a maximum runtime of 5.8 hours.
  • Fuel Efficiency: With a gasoline consumption at 25% load of 0.18 GPH (gallon per hour), the GP3000i is more fuel efficient than the Generac GP3500iO and its 0.22 GPH. The former's operation will therefore cost less in terms of the money spent on gasoline. Inverter generators like these 2 are of the most fuel efficient (and quiet) type.
  • THD: Both generators offer a low THD (<3% for the Generac GP3500iO and <3% for the Generac GP3000i) and are therefore perfectly suitable to safely power your sensitive electronic devices.

Portability Comparison

  • Bulkiness: As these two products share the same overall bulk, neither of them will really take up less storage space.
  • Weight: The GP3000i and its 59.5 lbs is somewhat lighter than the 74.3 lbs of the GP3500iO.
  • Portability: To the contrary of the GP3500iO, the GP3000i benefits from a handle, to help you get a better grip anytime you wish to move your portable generator.

Feature Comparison

  • Starting System: Both devices can get running via a conventional pull-start mechanism.
  • Outlets: The GP3500iO and the GP3000i both offer 3 AC outlets. None of them feature GFCI outlets. Both of them also feature a DC output. In addition, it is worth noting that they both only produce 120V. For more detailed information regarding all their respective receptacles, refer to the GP3500iO's and the GP3000i's product pages.
  • Data Center: The Generac GP3500iO offers a better insight into its power production than the Generac GP3000i, because it is equipped with a data center.

TL;DR

Generac GP3500iOGenerac GP3000i
Generac GP3500iOGenerac GP3000i
  • Higher running & starting watts
  • Higher runtime
  • Data center
  • Bigger engine
  • Lower fuel consumption
  • Lighter
  • Handle
Show all offers
Show all offers
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