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Written from the listing's specs, not from our own use · How we rate
If you're after clean inverter power, the Generac GP3300i delivers, with built-in CO sensing on top. It makes most sense for an RV park and a power cut at home; we rate it 6.5/10 from its listing.
| Brand | Generac |
|---|---|
| Category | Inverter generators |
| Listed fuels | gasoline |
| CO sensor | Stated in the listing |
| Outlets named in the listing | USB |
| CARB compliant | Stated in the listing |
| ASIN | B0C2VTY5Y2 |
Full listing title: Generac 7153 GP3300i 3,300-Watt Gas-Powered Portable Inverter Generator - Lightweight Design - USB Ports for Mobile Device Charging - COsense Technology - CARB Compliant, Orange/Black
Rated from the listing's specs, no buyer reviews yet
What it's made for: an RV park and a power cut at home.
Two generators close to it on our rating, each with a dated price.
What it has going for it
Inverter. The engine speeds up and slows down with the load, so it is quieter and thriftier at 3 a.m. when only the fridge and a lamp are on. The clean sine wave is kinder to laptops, TVs and the furnace control board.
CO sensor. A sensor that watches the carbon monoxide around the unit, per the listing. Treat it as a backup: the generator still belongs outside, about 20 ft from doors and windows.
Economy mode. The engine idles down when the load drops: quieter overnight, and the tank lasts longer.
The seller states, word for word, in the Generac GP3300i listing:
Activate Economy Mode to automatically adjust engine speeds, reducing fuel consumption and noise emissions.
Equipped with LED indicators for low oil, overloaded, and ready-to-use.
The seller's claims, quoted as written; we haven't measured any of it. The noise on your driveway and the surge of your well pump are things you only find out at home.
What the Generac GP3300i listing names:
The manual has the last word on fuel, oil and the outlet ratings; read it before the first start.
We have no recent price on file for this listing, so we don't print an old one.
The button opens the exact listing (ASIN B0C2VTY5Y2), where today's price, stock and seller apply.
Our take
What we'd buy the Generac GP3300i for is clean inverter power, with built-in CO sensing as a bonus. No buyer reviews yet, so the Generac GP3300i has to win you over on paper. The one thing that bugs us: gasoline only, while most picks here also burn propane. We'd pick it if laptops, TVs or a furnace board will be plugged in; otherwise, put it next to the Champion 10,000W Tri Fuel Open Frame first.
Fill it with oil before the first start, then run it for a few minutes outside with a small load.
Pull the cord, let it warm up, then add loads one at a time, the biggest motor first. Keep stabilised cans ready, never refuel it hot.
Run it every month or so for 20 minutes. Add stabiliser or run the carburetor dry before storage. Our maintenance schedule has the full list.
First oil change after the break-in hours in the manual, then on schedule. Air filter and spark plug once a season, and a cover for the months it sits.
Before the Generac GP3300i goes in your cart, check the running watts: the listing we read gives no clear wattage, so ask for the running figure before you size anything against it.
Write down what has to run at the same time, add the biggest motor surge (well pump, sump pump, AC), and let our sizing calculator do the sums.
Plan on heavy-duty extension cords to the appliances, or ask an electrician which inlet and switch would match its outlets. Our interlock vs transfer switch guide compares the two routes.
Outside only, about 20 ft from doors, windows and vents, exhaust pointing away (the CO sensor is a backup, not a permission). Pick the spot now, before the storm. Our CO safety and placement guide has the details.
Gasoline goes stale in a few months: stabiliser, a dry place for the cans, and a run every month or so keep it ready. Our fuel storage guide and maintenance schedule cover both.
How the Generac GP3300i stacks up against the closest alternative, the Champion 10,000W Tri Fuel Open Frame.
| Criterion | Generac GP3300i | Champion 10,000W Tri Fuel Open Frame |
|---|---|---|
| Our rating | 6.5/10 | 6.8/10 |
| Fuels | Gasoline | Gas, propane, natural gas |
| CO sensor | Stated | Not stated |
| Start | Not stated | Electric |
| Warranty | Not stated | 3 years |
Pick the Champion 10,000W Tri Fuel Open Frame if you want our higher-rated option (6.8/10), with natural gas as a third fuel and electric start; stay with the Generac GP3300i for a CO sensor.
We rate it 6.5/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.
The listing names gasoline. Run it outdoors only, away from doors, windows and vents.
Its listing states clean inverter power and a built-in CO sensor. These are the seller's figures, not our measurements: how loud it is in your driveway and how it handles your well pump's surge can't be read from a listing.
Your load list: write down what has to run at the same time, add the biggest motor surge (well pump, sump pump, AC), and let our sizing calculator do the sums. How it reaches the house: plan on heavy-duty extension cords to the appliances, or ask an electrician which inlet and switch would match its outlets. Our interlock vs transfer switch guide compares the two routes. Where it will run: outside only, about 20 ft from doors, windows and vents, exhaust pointing away (the CO sensor is a backup, not a permission). Pick the spot now, before the storm. Our CO safety and placement guide has the details. Fuel and storage: gasoline goes stale in a few months: stabiliser, a dry place for the cans, and a run every month or so keep it ready. Our fuel storage guide and maintenance schedule cover both.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula, plus our editors' read of how it compares with its rivals.