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Generac

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

  • Based on 220 reviews
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Availability: Only 2 left in stock, order soon!
Fulfilled by OmniHop
Arrives Dec 4 – Dec 12
Order within 20 hours and 32 minutes
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Style: 22,500 Watts


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: No Finish


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: No Finish


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


Total Power Outlets: 3


Starting Wattage: 22500 Watts


Running Wattage: 18000 Watts


UPC: 696471101324


Manufacturer: Generac


Item Weight: 427 pounds


Item model number: 8917


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 4 – Dec 12

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

    • very easy to use, and is able to use both LP gas and petrol.
Style: 9,400 Watts
This dual fuel Generac generator has been very effective in empowering my house when I lost power.My first use was early May and I lost power for three days and it ran very efficiently, gas consumption was relative needing about 10 gallons in the three days that it was in use. It’s very easy to start and hook up. It powered most of my appliances, including refrigerator, stove, microwave, fans,my water pump, and Boiler I would recommend this to anyone who needs a generator that can power your house when you lose electricity. ... show more
Reviewed in the United States on August 12, 2025 by BIGDOG
    • good
Style: 10,000 Watts
starts right up perfect machine
Reviewed in the United States on October 18, 2025 by Amazon Customer
    • Big and heavy but that’s why it is such high quality
Style: 12,500 Watts Tri Fuel - 50 St
Very good quality. Runs on three different fuels and it’s a beast because it can run a lot of things in your house all at once. Natural gas, propane and gasoline. Hope I never have to use it but if I do I’m set
Reviewed in the United States on October 9, 2025 by Amazon Customer
    • Won't even start
Style: 19,300 Watts
I had a bad experience with Amazon after buying this. The first machine that was delivered had a massive dent in the fuel tank where it had clearly been dropped onto the ground from a height. I only found that out after unboxing (something that takes an hour because it's in a crate). I contacted Amazon who did arrange to have it replaced. When the new one arrived, it won't even start. There is something fundamentally wrong with it - the battery is good, it has correct fuel, etc. but the starter motor won't turn over. The local dealer don't know what is wrong with it and Generac are no help at all. ... show more
Reviewed in the United States on November 7, 2025 by Saperlo
    • Parts Missing
Style: 19,300 Watts
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 generator for a very good price!
Style: 22,500 Watts
This is a excellent generator that can handle most applications and it’s relatively simple to use fairly low noise levels
Reviewed in the United States on August 24, 2025 by Thomas Quigley
    • Excellent and convenient !!!
Style: 12,500 Watts Tri Fuel
Extra convenience due to fuel flexibility, great power source and easy to start…
Reviewed in the United States on September 17, 2025 by Walner Hernandez
    • Great Generator
Style: 10,000 Watts
Really great generator. Easy assembly, easy start. Used once after owning for several months and it ran great. Its not terribly loud compared to other brands. Would highly recommend.
Reviewed in the United States on November 26, 2025 by Aaron

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