Generac 3300i
Generator. Specs from the manufacturer page (checked ).

The Generac GP3300i is an inverter generator rated at 2,500 running watts with 3,300 starting watts, powered by a 149cc engine. It weighs 27.7 kg (61 lb) and uses PowerRush technology for over 50% more starting capacity for motor-driven equipment. It includes duplex outlets, a 30A twistlock outlet, USB ports and COsense carbon monoxide protection.
Key features
- PowerRush technology provides over 50% more starting capacity for motor-driven equipment
- Duplex outlets, a 30A twistlock outlet and USB ports
- TruePower technology provides clean, stable power for sensitive electronics, tools and appliances
- COsense technology stops the unit and alerts you to hazardous carbon monoxide
- Economy Mode automatically adjusts engine speed to save fuel and reduce sound emissions
- Parallel Ready: connect two GP3300i units for twice the power (parallel kit sold separately)
- Recoil starting method and 1.06 gal (4 L) fuel tank
- Run time 4.5 hr at 50% load
What it is for
- RV essentials
- Outdoor activities
Specifications
| Running watts | 2500 W |
|---|---|
| Peak / surge | 3300 W |
| Tank | 4 L (1.1 gal) |
| Run time at 50 % load | 4.5 h |
| CO shutoff | Yes |
| Weight | 27.7 kg (61.1 lb) |
| Dimensions | 56.5 × 34 × 46.7 cm (22.2 × 13.4 × 18.4 in) |
From the Generac page. Values the manufacturer does not publish are left out.
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Connection and wiring
Follow the diagrams in the Generac manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| Blinking RED light | The generator shut off because carbon monoxide is accumulating from the exhaust. The red light in the COsense badge blinks for at least five minutes after the shut-off. | Move the generator to an open outdoor area and point the exhaust away from people and occupied buildings. Once it is in a safe area, it can be restarted and connected. Ventilate the location where it shut down. | 11 |
From the Generac manual. All 1 3300i codes →
FAQ
How long does the Generac 3300i run on a tank?
The maker rates it at 4.5 hours at 50 % load (about 1,250 W) on a 1.1-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Generac 3300i start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 3300 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.