Portable inverter generators like the Generac GP3300i provide clean, stable power in a compact package. Unlike conventional generators, inverter technology produces electricity that’s safe for sensitive electronics, making them ideal for a variety of applications from recreational use to emergency backup power.
Key Features of the Generac GP3300i
Power Output: 3,300 starting watts and 2,500 running watts, sufficient for powering multiple devices simultaneously
TruePower Technology: Delivers clean, stable power with less than 3% total harmonic distortion, safe for sensitive electronics
PowerRush Advanced Technology: Provides over 50% more starting capacity for tools and motor-driven equipment
Lightweight Design: Weighing only 27 pounds, making it truly portable and easy to transport
Economy Mode: Automatically adjusts engine speed to reduce fuel consumption and noise
COsense Technology: Automatically shuts down the generator if dangerous carbon monoxide levels are detected
USB Ports: Two USB outlets for charging mobile devices directly
Parallel Ready: Can be connected with another compatible unit to double power output
Assessing Your Power Needs
Before purchasing the GP3300i, calculate your power requirements:
With 2,500 running watts, it can handle multiple small appliances or one larger device
Ideal for camping equipment, small power tools, TVs, laptops, and lighting
The 3,300 starting watts accommodate the initial surge required by many devices
Consider whether your needs might exceed this capacity during emergencies or outdoor activities
Fuel Efficiency and Runtime
The GP3300i offers excellent efficiency for its class:
1.06-gallon fuel tank capacity
Up to 7 hours runtime at 25% load when in Economy Mode
Gasoline-powered with a 149cc 4-stroke engine
Economy Mode significantly extends runtime and reduces noise
Portability Considerations
One of the GP3300i’s standout features is its portability:
Lightweight at just 27 pounds
Compact dimensions: 22.2″L x 13.4″W x 18.4″H
Built-in handle for easy carrying
Ideal for camping, tailgating, and situations requiring frequent movement
Safety Features
The GP3300i includes several important safety features:
COsense Technology: Monitors carbon monoxide levels and automatically shuts down if dangerous levels are detected
LED Indicators: Alert you to low oil, overloads, and operational status
CARB Compliant: Meets strict California Air Resources Board emissions standards
Automatic Low Oil Shutdown: Protects the engine from damage
Noise Level Considerations
Inverter generators are known for quieter operation:
The GP3300i operates significantly quieter than conventional generators
Economy Mode further reduces noise by adjusting engine speed
Ideal for camping, tailgating, and other settings where noise is a concern
Connectivity and Outlets
The generator provides multiple connection options:
Two standard 120V household outlets
Two USB ports for direct device charging
Parallel capability port for connecting to another compatible unit
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
Color
Orange/Black
Product Dimensions
22.2"L x 13.4"W x 18.4"H
Material
Plastic
Model Name
GP3300i
Engine Type
4 Stroke
Ignition System Type
Electronic
Tank Volume
1.06 Gallons
Engine Displacement
149 Cubic Centimeters
Runtime
7 hours
Total Power Outlets
2
Frequency
60 Hz
Starting Wattage
3300 Watts
Running Wattage
2.5E+3 Watts
UPC
696471086263
Manufacturer
Generac
Item Weight
27 pounds
Department
Unisex-Adult
Item model number
7153
39 reviews for Generac 3,300-Watt Portable Inverter Generator
4.2out of 5
★★★★★
★★★★★
11
★★★★★
2
★★★★★
0
★★★★★
1
★★★★★
2
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★★★★★
Amazon Customer –
The media could not be loaded.
This generator is very quiet and easy to move around.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
gy1 –
The media could not be loaded.
I have a van I converted to a camper. Every now and again I like to go where power isnt avail. This generator is quiet even under a full load. In the video I turned on everything for a full power test. The window A/C is on high, electric heater on high, lights on (led) and fridge running. Its under a full load and you can stand right next to it and have a conversation. Seems well built, easy to start, and maint access is very easy to get to.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Brandon T –
Surprisingly quiet, I wish it was lighter.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Amazon Customer –
This little generator works well. Powerful. Quiet. Starts on the first or second pull. Much less expensive than the Honda.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
gy1 –
I ordered this because we are in a power outage. This generator has been running for the past 35 hours and is easily handling our power needs.
Currently have the fridge and various phone and laptop chargers and lamp connected on one line all the time.
Then, as needed, running the coffee maker, garbage disposal, toaster, microwave, washer, dryer, charing the backup sump pump, and will be trying the induction hot plate and dishwasher.
It’s very quiet and really fuel efficient. We have been able to get 11 hours on each tank of gas.
Just did the first oil change at the 36 hour mark, the photo shows the shop rag with the oil that came out of the generator. It looked good with no shiny bits in it. Before filling the generator with oil I marked the oil bottle that came with the generator with a sharpie. I filled that bottle to the sharpie mark so I got the right amount of oil needed for the change.
The generator also has a oil catch/guide so when you drain the oil it directs the oil out of the enclosure which is a really nice touch.
It’s only been a day and a half but really pleased so far.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Amazon Customer –
I’ve wanted a Honda generator forever since I used to work with them at my job. When I was shopping for one on Amazon, I came across this generator. I knew it was a solid brand but I wondered if I could get away with purchasing this brand instead. The price difference was substantial and the reviews for this Generac were great. Man, I have been running this thing just for fun. It’s soooo quiet. I used it to paint my fence which was far away from my power back at the house. It allowed me to plug the paint sprayer into it and it ran like a champ. I no longer use multiple extension cords. I plug one extension cord into the Generac and then swap my tools out as I need them. It’s incredibly quiet and very fuel efficient. I don’t feel like this machine exceeded my expectations and I’m glad I didn’t spend that extra money on a Honda. This Generac will last me forever. *As always, be sure to put oil in it prior to using.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Amazon Customer –
Where do I start, this generator is very quiet and can handle a big load, however the generator stopped working after 4 days. Got it fixed under warranty, 2 weeks later it starts sputtering, backfiring, and cutting off. This morning the unit stopped producing power and completely died. They say these generators are good for 25 years or 3000hrs. Mine lasted less than a month with a professional manufacturer warranty repair in the first week of owning it. Now I don’t have time to have it repaired for a second time nor do I trust that it will solve anything. This is going straight to the dump and I’m going to have to buy another generator. Id give this generator negative 5 stars if I could. Go with a Honda,
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Customer437 –
ONLY RAN 3 HOURS AND NOW WILL NOT STAY RUNNING…
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Amazon Customer –
This generator impressed me initially with its quiet operation and high capacity. Unfortunately, it failed after just 4 days. After warranty repair, it began having issues again within 2 weeks – sputtering, backfiring, and shutting down unexpectedly. This morning it completely stopped working. Despite claims of 25-year/3000-hour lifespan, mine didn’t even last a month, even with professional warranty repair in the first week. I don’t have time for another repair cycle and have lost confidence in the product. I’ll be disposing of this unit and purchasing a different generator. Would give negative ratings if possible. I recommend considering Honda instead.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Amazon Customer –
I’ve always admired Honda generators from my previous job experience, but when shopping on Amazon, I discovered this Generac alternative at a significantly lower price with excellent reviews. I’m absolutely thrilled with my purchase! This generator runs incredibly quietly – I’ve been using it just for enjoyment. It powered my paint sprayer perfectly when working on a fence far from my house’s power supply. Now I use just one extension cord plugged into the Generac and switch tools as needed, eliminating the hassle of multiple cords. It’s remarkably quiet and fuel-efficient. This generator has completely met my expectations, and I’m glad I saved money by not buying a Honda. The Generac will serve me for years to come. Remember to add oil before first use.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Brandon T –
Unexpectedly quiet operation, though I’d prefer if it were less heavy.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Amazon Customer –
This compact generator is impressive. It delivers strong power output while maintaining low noise levels. It’s easy to start, typically firing up on the first or second attempt. Best of all, it’s significantly more affordable than comparable Honda models.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
gy1 –
I converted my van into a camper and occasionally travel to places without power access. This generator performs excellently even when fully loaded. I tested it by simultaneously running my window A/C on high, electric heater on high, LED lights, and refrigerator. Even under this full load, it remains remarkably quiet – you can easily have a conversation while standing right next to it. The generator appears well-constructed, starts without difficulty, and offers convenient access for maintenance.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Customer437 –
Fast shipping. Operates silently.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
Amazon Customer –
This portable generator operates with minimal noise and is effortlessly mobile.
Helpful(0)Unhelpful(0)You have already voted this
★★★★★
gy1 –
I purchased this generator during a power outage, and it’s been running continuously for 35 hours while easily meeting our electricity needs. We’ve constantly had our refrigerator, phone/laptop chargers, and a lamp connected, while also using it as needed for appliances like the coffee maker, garbage disposal, toaster, microwave, washer, dryer, backup sump pump, and plan to try it with the induction hot plate and dishwasher.
The generator operates very quietly and is remarkably fuel-efficient, providing about 11 hours of power per tank of gas. I just completed the first oil change at 36 hours, and the oil looked clean with no metal fragments. The included oil bottle made refilling easy, and I appreciated the thoughtful oil catch/guide feature that directs oil away from the enclosure during draining.
Though I’ve only had it for a day and a half, I’m extremely satisfied with the performance so far.
Amazon Customer –
The media could not be loaded.
This generator is very quiet and easy to move around.
gy1 –
The media could not be loaded.
I have a van I converted to a camper. Every now and again I like to go where power isnt avail. This generator is quiet even under a full load. In the video I turned on everything for a full power test. The window A/C is on high, electric heater on high, lights on (led) and fridge running. Its under a full load and you can stand right next to it and have a conversation. Seems well built, easy to start, and maint access is very easy to get to.
Brandon T –
Surprisingly quiet, I wish it was lighter.
Amazon Customer –
This little generator works well. Powerful. Quiet. Starts on the first or second pull. Much less expensive than the Honda.
gy1 –
I ordered this because we are in a power outage. This generator has been running for the past 35 hours and is easily handling our power needs.
Currently have the fridge and various phone and laptop chargers and lamp connected on one line all the time.
Then, as needed, running the coffee maker, garbage disposal, toaster, microwave, washer, dryer, charing the backup sump pump, and will be trying the induction hot plate and dishwasher.
It’s very quiet and really fuel efficient. We have been able to get 11 hours on each tank of gas.
Just did the first oil change at the 36 hour mark, the photo shows the shop rag with the oil that came out of the generator. It looked good with no shiny bits in it. Before filling the generator with oil I marked the oil bottle that came with the generator with a sharpie. I filled that bottle to the sharpie mark so I got the right amount of oil needed for the change.
The generator also has a oil catch/guide so when you drain the oil it directs the oil out of the enclosure which is a really nice touch.
It’s only been a day and a half but really pleased so far.
Amazon Customer –
I’ve wanted a Honda generator forever since I used to work with them at my job. When I was shopping for one on Amazon, I came across this generator. I knew it was a solid brand but I wondered if I could get away with purchasing this brand instead. The price difference was substantial and the reviews for this Generac were great. Man, I have been running this thing just for fun. It’s soooo quiet. I used it to paint my fence which was far away from my power back at the house. It allowed me to plug the paint sprayer into it and it ran like a champ. I no longer use multiple extension cords. I plug one extension cord into the Generac and then swap my tools out as I need them. It’s incredibly quiet and very fuel efficient. I don’t feel like this machine exceeded my expectations and I’m glad I didn’t spend that extra money on a Honda. This Generac will last me forever. *As always, be sure to put oil in it prior to using.
Amazon Customer –
Where do I start, this generator is very quiet and can handle a big load, however the generator stopped working after 4 days. Got it fixed under warranty, 2 weeks later it starts sputtering, backfiring, and cutting off. This morning the unit stopped producing power and completely died. They say these generators are good for 25 years or 3000hrs. Mine lasted less than a month with a professional manufacturer warranty repair in the first week of owning it. Now I don’t have time to have it repaired for a second time nor do I trust that it will solve anything. This is going straight to the dump and I’m going to have to buy another generator. Id give this generator negative 5 stars if I could. Go with a Honda,
Customer437 –
ONLY RAN 3 HOURS AND NOW WILL NOT STAY RUNNING…
Amazon Customer –
This generator impressed me initially with its quiet operation and high capacity. Unfortunately, it failed after just 4 days. After warranty repair, it began having issues again within 2 weeks – sputtering, backfiring, and shutting down unexpectedly. This morning it completely stopped working. Despite claims of 25-year/3000-hour lifespan, mine didn’t even last a month, even with professional warranty repair in the first week. I don’t have time for another repair cycle and have lost confidence in the product. I’ll be disposing of this unit and purchasing a different generator. Would give negative ratings if possible. I recommend considering Honda instead.
Amazon Customer –
I’ve always admired Honda generators from my previous job experience, but when shopping on Amazon, I discovered this Generac alternative at a significantly lower price with excellent reviews. I’m absolutely thrilled with my purchase! This generator runs incredibly quietly – I’ve been using it just for enjoyment. It powered my paint sprayer perfectly when working on a fence far from my house’s power supply. Now I use just one extension cord plugged into the Generac and switch tools as needed, eliminating the hassle of multiple cords. It’s remarkably quiet and fuel-efficient. This generator has completely met my expectations, and I’m glad I saved money by not buying a Honda. The Generac will serve me for years to come. Remember to add oil before first use.
Brandon T –
Unexpectedly quiet operation, though I’d prefer if it were less heavy.
Amazon Customer –
This compact generator is impressive. It delivers strong power output while maintaining low noise levels. It’s easy to start, typically firing up on the first or second attempt. Best of all, it’s significantly more affordable than comparable Honda models.
gy1 –
I converted my van into a camper and occasionally travel to places without power access. This generator performs excellently even when fully loaded. I tested it by simultaneously running my window A/C on high, electric heater on high, LED lights, and refrigerator. Even under this full load, it remains remarkably quiet – you can easily have a conversation while standing right next to it. The generator appears well-constructed, starts without difficulty, and offers convenient access for maintenance.
Customer437 –
Fast shipping. Operates silently.
Amazon Customer –
This portable generator operates with minimal noise and is effortlessly mobile.
gy1 –
I purchased this generator during a power outage, and it’s been running continuously for 35 hours while easily meeting our electricity needs. We’ve constantly had our refrigerator, phone/laptop chargers, and a lamp connected, while also using it as needed for appliances like the coffee maker, garbage disposal, toaster, microwave, washer, dryer, backup sump pump, and plan to try it with the induction hot plate and dishwasher.
The generator operates very quietly and is remarkably fuel-efficient, providing about 11 hours of power per tank of gas. I just completed the first oil change at 36 hours, and the oil looked clean with no metal fragments. The included oil bottle made refilling easy, and I appreciated the thoughtful oil catch/guide feature that directs oil away from the enclosure during draining.
Though I’ve only had it for a day and a half, I’m extremely satisfied with the performance so far.