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Generac

Generac 22,500/18,000-Watt Portable Gas Generator - Electric Start - Home Backup or RV Ready - Heavy Duty Frame - Quiet, Long Runtime, Emergency Power - 49-State Compliant

  • Based on 117 reviews
Condition: New
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Availability: Only 9 left in stock, order soon!
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Style: 18000-Watt


Features

  • Powerful Generac Engine - The Generac 8917 HP18000EFI 816cc EFI Engine delivers optimal power for peak performance and efficiency, making it a reliable choice for your power needs.
  • COsense Technology Protection - Stay safe with our COsense Technology that provides powerful protection against hazardous carbon monoxide.
  • TruePower for Electronics - Our TruePower Technology, with less than 5% THD, safely powers sensitive electronics and tools, making it ideal for home use.
  • Low-Oil Pressure Shutdown - Our generator features a low-oil pressure shutdown mechanism that automatically safeguards the engine from damage, ensuring longevity and reliability.
  • Large Fuel Capacity - The large capacity fuel tank, with an incorporated fuel gauge, provides extended run times and durability for long-term use.

Description

From emergency home backup to DIY projects to the jobsite, the Generac GP18000EFI portable generator provides high wattage, dependable portable power. Equipped with an 816cc engine with Electronic Fuel Injection, the GP18000EFI delivers power efficiently, providing up to 9 hours of runtime at 50% load. TruePower™ Technology safely powers sensitive electronics, appliances and tools while onboard COsense® Technology provides powerful protection against hazardous carbon monoxide. The GP18000EFI also features electric start (battery included), low-oil shutdown protection, circuit breaker protected outlets and an hour meter with maintenance resets. The included never-flat wheel kit and available lifting eye accessory make transportation easy around the home or jobsite.

Brand: Generac


Wattage: 18000 watts


Fuel Type: Gasoline


Power Source: Fuel Powered


Recommended Uses For Product: Residential


Voltage: 120 Volts


Output Wattage: 18000


Special Feature: Portable


Included Components: Generator, Owner's manual


Color: Orange


Brand: Generac


Wattage: 18000 watts


Fuel Type: Gasoline


Power Source: Fuel Powered


Recommended Uses For Product: Residential


Voltage: 120 Volts


Output Wattage: 18000


Special Feature: Portable


Included Components: Generator, Owner's manual


Color: Orange


Product Dimensions: 58.5"L x 30.9"W x 36.5"H


Model Name: GP18000EFI


Engine Type: 816cc EFI Engine


Ignition System Type: Electronic


Tank Volume: 14.2 Imperial Gallons


Engine Displacement: 816 Cubic Centimeters


Runtime: 9 hours


Total Power Outlets: 3


Frequency: 50 Hz


Starting Wattage: 22500 Watts


Running Wattage: 18000 Watts


UPC: 696471101324


Manufacturer: Generac


Item Weight: 427 pounds


Country of Origin: USA


Item model number: 8917


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: within 30 days

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.

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Top Amazon Reviews

    • Generac generater
Style: 3600-Watt
Started on the 2 nd pull on the rope? Runs beautifup
Reviewed in the United States on May 30, 2025 by Roni
    • Good buy
Style: 8000-Watt
Tend to loose power when ever it rains or during high winds so this has been a life saver.
Reviewed in the United States on April 24, 2025 by Ken
    • The directions produced good results.
Style: 8000-Watt
After a few electrical connections, and installation of wheels, the generator started up! Another worker is needed for a safe installation.
Reviewed in the United States on April 13, 2025 by David H. Althouse
    • 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
    • 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
    • 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
    • I needed it.
Review Image by J. J. Schaefer J. J. Schaefer
These days the power keeps going out. I could have bought the big hole house generator for thousands of dollars but I just got this one for about one thousand. Just for my furnace and frig. Had to get a furnace switch to go from power company to my generator and have help to put it in. Push the button on generator to start it. Was easy to put together. Its got a gas gauge. Nice. Just a little loud. Start it once a month to keep it in good shape. ... show more
Reviewed in the United States on November 18, 2024 by J. J. Schaefer J. J. Schaefer
    • A1 Top Shelf Portable Generator
Style: 18000-Watt
Best portable generator I've ever seen, much less owned. This hoss gets er done. Best investment so far for me this year.
Reviewed in the United States on February 10, 2025 by Bryan Morgan

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