How much power does the Generac GP3300i give you?
On gas, this model is rated for 2,500 running watts and 3,300 starting watts. Running watts are the power available while your appliances are on. Starting watts are a short burst to help things like refrigerators and pumps turn on. You cannot use that bigger number for appliances that need steady power.
| Fuel | Running watts | Starting watts |
|---|---|---|
| Gasoline | 2,500 W | 3,300 W |
Some numbers come from the seller's listing and have not been confirmed in a matching manufacturer manual. Get those details before depending on this generator for important appliances.
The details for this model
Model: GP3300i. Manufacturer part number: 71532. These are published specifications, not results from our own testing. If a detail is missing, we leave it marked rather than use a number from a similar generator.
A detail to confirm: Amazon identifies 71532. The available official specification sheet covers a different GP3300i revision (7154). Family output is cross-checked, but remaining revision-specific details are not yet confirmed.
- How it starts
- Pull cord
- Voltage
- 120V
- Gas tank
- 1.06 gal (listed; revision confirmation needed)
- How long it runs
- 7 hours at 25% power use (listing; verify revision)
- Weight
- Not confirmed for this model
- Size (L × W × H)
- Not confirmed for this model
- Outlets
- Not confirmed for this model
- Generator type
- Not yet confirmed
- Power smoothness (THD; lower is generally smoother)
- Not confirmed for this model
- Carbon monoxide shutdown
- COsense
- Noise
- Not confirmed for this model
- Warranty
- Not confirmed for this model
A 120V outlet powers ordinary household plug-in devices. Some pumps and larger equipment need 240V. Inverter models use electronics to control the electricity they supply. THD measures how smooth that electricity is; a lower number generally means smoother power. Check your device instructions before connecting electronics.
Sources: Manufacturer specifications / manual ·
How long will it run?
The published runtime is 7 hours at 25% power use (listing; verify revision). The listed gas tank holds 1.06 gal (listed; revision confirmation needed). The more power you use, the sooner you will need fuel. A runtime measured at 25% load means the generator was only supplying a quarter of its running power, not working flat out.
Keep approved gas containers, rotate stored fuel, and plan where you can refill them. A bigger wattage number will not help if you run out of fuel. Read our fuel-storage guide →
What can you run during an outage?
Start by listing the appliances you need most. Check both their running watts and the extra power they need to start. A refrigerator, for example, may need much more power for a moment when its compressor kicks on.
Here is an example, not a test of this generator: a refrigerator using 600 running watts, plus 100 watts of lights and 100 watts for a router and other small devices, adds up to 800 watts. If that refrigerator needs 1,800 watts to start, the total briefly reaches 2,000 watts. Your appliances may use different amounts.
Confirm this generator’s running and starting ratings before using that example to choose appliances. If you use propane or natural gas, check those ratings separately.
A 1,500-watt heater uses a lot of power on its own. Follow its connection instructions; many portable heaters must plug directly into a suitable wall outlet. This review does not confirm 240V output for this model. Do not choose it for a 240V pump or air conditioner without checking that first. Work out how much power you need →
What we like and what to consider
Reasons to consider it
- A gas-only setup with no fuel switching.
- 2,500 running watts on gas advertised by the seller; not yet confirmed in the correct manual.
- Inverter design, which can be useful for compatible electronics.
Things to keep in mind
- Confirm its weight before planning how to move it.
- No confirmed propane rating is available.
- There is no complete noise test to compare with other models.
What owners are saying
We do not have enough owner feedback for this exact model to give a fair summary. Reviews for a similar generator, or another option on the same Amazon page, may describe a different machine. Before buying, check recent reviews for the full model number and find out how the seller handles service and returns.
Starting, moving, and maintenance
The listed starting options are: pull cord. Practice starting it before an outage so you know you can use it when needed. Check its weight and size before deciding where to store it.
We have not confirmed the warranty for this exact model. Read the full terms, including whether your seller and intended use are covered. Follow the manual for oil type, oil changes, and storage. Keep track of running hours during a long outage. See our maintenance guide →
Other generators to compare
Honda EU3200i →
The EU3200i adds fuel injection and more running power than the EU2200i while keeping a portable inverter design. It is still 120V only. The Amazon listing and manufacturer page use slightly different model codes, so confirm the version before ordering accessories.
2,600 running watts on gas · Gasoline · 120V
RVMP Flex Power 3300i →
This RVMP 3300i uses a pull starter; it is different from the remote-start 3300iR. It is a compact inverter for 120V appliances. The manufacturer page gives conflicting running-watt figures, so use the lower 2,700-watt figure until the correct manual is confirmed.
2,700 running watts on gas · Gasoline · 120V
Generac GP2500i →
The GP2500i is a small gas inverter for portable use and a few home essentials. It provides 2,200 running watts and 2,500 starting watts. Compare the exact version, warranty, and local service options with other small generators before buying.
2,200 running watts on gas · Gasoline · 120V
Questions about the Generac GP3300i
How much running power does it provide?
2,500 watts on gasoline. Starting watts are only available briefly, not for steady use.
Is it an inverter generator?
We have not confirmed the generator type in a matching manufacturer manual. Check your electronics’ power requirements before connecting them.
Can I use it in a garage if it has CO shutdown?
No. Never run a generator in a garage, even with the door open. Use it outdoors at least 20 feet from homes and openings, with exhaust pointed away. Carbon monoxide shutdown is extra protection; it does not make indoor use safe.
Can I connect it to my house?
Check the voltage and outlets before planning a home connection. Have an electrician choose and install the right transfer equipment and check the generator’s wiring setup. Never connect a generator to a household wall outlet.
Should you consider the Generac GP3300i?
This gas-powered inverter is made for selected 120V appliances, rather than a whole house. It may handle a refrigerator if the appliance's starting demand fits. Check that the specifications match version 71532, since other versions can differ.
Check Price on AmazonWhere the information comes from
We use the sources below to compare specifications and features. We have not personally tested this generator.
- Manufacturer specifications / manual
- CDC generator safety guidance ↗
- How we put our reviews together