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Generac GP18000EFI Portable Generator – Pro Tool Reviews

Round Out Hurricane Season with Generac’s Most Powerful Portable Generator Yet

Portable generators provide backup power at home, at work, and away. Whether you’re shopping for a unit to prepare for hurricane season, or you’re looking for something to make camping more comfortable, Generac is a name that comes up time and time again. The Generac GP18000EFI portable generator is supposed to be the brand’s most powerful portable unit to date. We’re looking at what it has to offer so you can see if it’s right for your home or jobsite.

Note: Looking for more of our favorite generators? Check out our list of the Best Generator Reviews to see which ones make the cut!

Generac GP18000EFI Portable Generator Performance

  • Model: Generac GP18000EFI
  • Running wattage: 18,000W
  • Starting wattage: 22,500W
  • Horsepower: 24.1 HP
  • Engine displacement: 816cc
  • 7 power ports
  • TruePower technology
  • COsense technology
  • Low oil pressure shutdown
  • Compatible with Homelink Manual Transfer Switch

The Generac GP18000EFI portable generator is the brand’s highest-wattage unit available at the time of writing. Equipped with an 816cc EFI engine, it delivers up to 9 continuous hours of runtime at 50% load.

With a running wattage of 18,000W, Generac tells us that it has the capacity to provide whole-home backup power when paired with a HomeLink manual transfer switch.

There are a total of 7 power ports, letting you power a variety of electronics and appliances around your home. Plus, Generac’s TruePower technology allows you to safely power sensitive electronics and tools.

For safety features, this generator includes COsense technology, which alerts when it detects high carbon monoxide levels. A low-oil pressure shutdown also safeguards the engine from damage when the oil runs low.

Generac GP18000EFI Portable Generator Design

  • Dimensions (LxWxH): 59 x 31 x 37 inches
  • Weight: 439 pounds
  • Heavy-duty never-flat wheels
  • Folding handles
  • Hardened steel tube cradle
  • Large-capacity fuel tank
  • Hour meter tracks maintenance intervals

This portable generator weighs 439 pounds. It features heavy-duty never-flat wheels that help you transport it around your home or jobsite. There are also handles that fold down for compact storage.

The GP18000EFI has a 14.2-gallon steel fuel tank for long runtimes. An incorporated fuel gauge and a digital hour meter let you keep an eye on your runtimes and fuel levels.

Finally, this unit is surrounded by a hardened 1 1/4-inch steel tube cradle that provides additional durability.

Generac GP18000EFI Price

This generator retails for $4,399 and you can find it wherever Generac products are sold. Generac backs your purchase with a 3-year residential/2-year commercial warranty.