Brands Generac

Inverter generator

Generac 3300i (71533)

A gas inverter generator rated at 2,500 running and 3,300 starting watts, with a 1.06-gallon tank and up to 4.5 hours of runtime at half load. It shuts itself off if carbon monoxide builds up.

Running watts
2,500 W
Starting / surge watts
3,300 W
Fuel
gasoline
Best for
RV trips and home backup for a fridge, lights and electronics, with clean power.
Not for
Central air, well pumps or 240V appliances. Buyers in California, as it is not CARB compliant.

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Specifications

Power
Running watts2,500 W
Starting / surge watts3,300 W
Fuelgasoline
Inverter (clean power)Yes
Runtime
Runtime at 50% load4.5 h
Fuel tank1.06 gal
Build
Weight61 lb
Length22.3 in
Width13.4 in
Height18.4 in
Safety & compliance
CO safety shutoffYes
CARB compliantNo

Checked 29 October 2026. Sources: generac.com.