Search  for anything...
Generac

Generac 4,500/3,600-Watt Portable Gas Generator - Electric Start - Home Backup or RV Ready - Heavy Duty Frame - Quiet, Long Runtime, Emergency Power- 49-State Compliant

  • Based on 145 reviews
Condition: New
Checking for the best price...
$499.00 Why this price?
Save $0.99 was $499.99

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Aug 10
Order within 22 hours and 3 minutes
Available payment plans shown during checkout

Style: 3600-Watt


Features

  • Powerful Portable Performance: With Generacs PowerRush Advanced Technology, the 7721 GP3600 generator delivers 40% more starting capacity, handling heavy electrical loads with ease. Ideal for emergency power, recreation, and home use
  • Smart Protection - Stay safe with the integrated COsense technology. This smart generator can detect and alert you of hazardous carbon monoxide levels during operation, ensuring your safety at home or on the go.
  • Extended Runtime: The GP3600 boasts a long-lasting OHV engine and a large-capacity steel fuel tank with a built-in fuel gauge, ensuring you have power when you need it most
  • Built for Durability: Designed to thrive in rough environments, this generator features covered outlets for added protection, a rugged 1.25-inch steel-tube cradle for strength, and heavy-duty, never-flat wheels for easy transportation
  • Maintenance Made Easy: Keep your generator in top shape with the hour meter that tracks maintenance intervals. Plus, the low-oil level shutdown feature automatically safeguards the engine from damage, ensuring a long and reliable lifespan

Description

The 3600-watt Generac GP3600 portable generator can be used to tackle home projects, provide power for tools, or deliver essential electricity in the case of an outage. It is an especially affordable solution with premium features. These include PowerRush™ Advanced Technology — delivering over 40% more starting capacity —an OHV engine for longer engine life and a large- capacity steel fuel tank with an incorporated fuel gauge for durability. The hardened steel tube cradle provides added strength, while the low-oil level shutdown protects your engine from damage. Heavy-duty, never-flat wheels and a foldable handle make for easy transportation of the generator. The compact size of the GP3600 ensures it will take up minimal storage space in the garage.

Brand: Generac


Wattage: 3600 watts


Fuel Type: Gasoline


Power Source: gas_powered


Recommended Uses For Product: Commercial


Item Weight: 105 Pounds


Voltage: 120 Volts


Output Wattage: 3600


Special Feature: Portable, Heavy Duty, CO Sensor


Included Components: Generac 7721 GP3600 3,600-Watt Gas-Powered Portable Generator - COsense Technology - Powerrush Advanced Technology - Reliable Power for Emergencies and Recreation - 49 State Compliant See more


Brand: Generac


Wattage: 3600 watts


Fuel Type: Gasoline


Power Source: gas_powered


Recommended Uses For Product: Commercial


Item Weight: 105 Pounds


Voltage: 120 Volts


Output Wattage: 3600


Special Feature: Portable, Heavy Duty, CO Sensor


Included Components: Generac 7721 GP3600 3,600-Watt Gas-Powered Portable Generator - COsense Technology - Powerrush Advanced Technology - Reliable Power for Emergencies and Recreation - 49 State Compliant


Color: Orange/Black


Product Dimensions: 24"L x 22.5"W x 21"H


Material: Plastic


Model Name: GP3600


Engine Type: 4 Stroke


Ignition System Type: Magneto


Tank Volume: 4.7 Gallons


Engine Displacement: 208 Cubic Centimeters


Runtime: 9 hours


Total Power Outlets: 3


Frequency: 50 Hz


Starting Wattage: 5040 Watts


Running Wattage: 3.6E+3 Watts


UPC: 696471086270


Manufacturer: Generac


Item Weight: 105 pounds


Department: Unisex-Adult


Item model number: 7721


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 10

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Dependable, and reliable
Style: 7500-Watt Dual Fuel
Easy to assemble and it started as it should and work through it out of the box. Have not used it yet for a storm, but I’m sure it will be good as we have another Generac generator and that one has worked flawlessly
Reviewed in the United States on July 26, 2025 by ken m.
    • Excellent
Style: 15500-Watt
Used daily for our business It's loud but easy to use. We use non-ethenol fuel in it & change the oil before the recommended & have had no issues. Have almost 500hrs on it. Quality is good, runs well. I wish it were cheaper, but compared to others it's in the money. We had a duramax prior & it didn't run well & ended up frying our equipment. This one is OK for electronics. Would recommend ... show more
Reviewed in the United States on December 22, 2024 by Amazon Customer
    • Nice
Style: 8000-Watt
Great value
Reviewed in the United States on July 23, 2025 by james mccann
    • YOU MUST ADD OIL AND FUEL THEN ITS READY TO GO
Style: 8000-Watt
IT WAS PACKED PERFECT ASSEMBLING OF THE WHEELS AND HANDLE WERE EASY THE BATTERY WAS CHARGED THE UNIT FIRED RIGHT UP I AM VERY PLEASED THANK YOU
Reviewed in the United States on July 31, 2025 by Sunnygirl
    • My opinion - buy a different name brand. Quality is not there.
Style: 9500-Watt Tri Fuel
In my opinion, This machine is junk. “Brand new” wouldn’t start. I can usually fix stuff but this thing is junk. I really thought buying generac name was a safe, but this will be my last generac I ever buy.
Reviewed in the United States on May 10, 2025 by Griffin collector
    • Parts Missing
Style: 15500-Watt
I like the build quality. I'm currently breaking in the generator, runs great. Made in USA definitely a plus. Value for the money spent is good compared to overseas models. The issue is that the axle for the wheel kit is missing from the wheel kit box. You'd expect better quality checking before shipping. Currently have been on hold w/ Generac support 25 min. I got a very nice girl to help me with this issue, so we'll see how good the support is. I'm getting the axle @ N/C under warranty. The drag is the 7-10 business days for shipping because Generac doesn't expedite shipping. UPDATE: Generac did UPS me an axle kinda quick, so kudos to them for that. Generator is running fine so far for 10hrs on brake in, only glitch was having to reset spark plug gap to proper .030 as it started to sputter a little. Spark plugs are gapped wrong from factory @ .018. I'm a auto tech so not a big deal. So far I would recommend this unit. It is well built, not bad on fuel so far & I'm picky. Also I like the fact it has AVR instead of capacitor regulation. Better for electronics. ... show more
Reviewed in the United States on October 28, 2024 by Begeiled
    • Power
Style: 9500-Watt Tri Fuel, 50ST
It's all good.
Reviewed in the United States on August 3, 2025 by yanir rivera
    • Its powerful
Style: 8000-Watt
It’s great!!!
Reviewed in the United States on August 3, 2025 by Linda Pesce

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...