Generac GP18000EFI - 18000/22500W Portable Generator With Electric Start And EFI Engine
The Generac GP18000EFI (8917) is a powerful open frame generator with a rated wattage of 18,000 W and a starting wattage of 22,500 W. (Read full specs)
Amazon 
Northern Tool 
Acme Tools 
The Home Depot 
Farm & Fleet 
Outbound Power 
Walmart 
Zoro Price history for the Generac GP18000EFI
Page Content
Description
Zoom on the Generac GP18000EFI
To sum up, the Generac GP18000EFI is a powerful portable generator tailored for:
- Professionals in need of safely powering high-intensity work or lighting equipment
- Prudent homeowners who want a full backup power source in case of a power outage
In the forthcoming sections, you'll delve into its power characteristics, the various outlets it offers, its overall portability, and the additional features it boasts.
Power & Run Time
The Generac GP18000EFI
Generac GP18000EFI is equipped with a 816 cc Generac G-Force OVHI 4-stroke engine, running on gasoline and providing 120/240V, boasting a running wattage of 18,000W alongside a starting wattage of 22,500W. The impressive running wattage makes this unit the 3rd biggest portable generator currently on the market, along with the Powerhorse s27000d.
This generator features a simple and elegant electric starter (battery included).
The Electronic Fuel Injection (EFI) system enhances the engine's reliability, lowers fuel consumption, improves startup, reduces servicing, boosts stale fuel resistance, and offers better altitude adaptability.
Featuring a 14.2 gallons fuel tank, the GP18000EFI can provide power for around 9 hours at 50% load on a full tank (with fuel consumption averaging 1.58 gallons per hour).
The GP18000EFI produces a clean sine wave: thanks to a <5% Total Harmonic Distortion (THD), your sensitive electronics can be safely plugged in the AC outlets.
Outlets
The control panel features the upcoming 7 AC outlets:
This Generac generator isn't quite RV Ready, but it features an L5-30R receptacle, allowing a simple RV connection through an L5-30P to TT-30R adaptor. Besides, the GP18000EFI's twist-lock L14-30R receptacle makes it transfer switch ready, enabling hassle-free connection to your breaker box for powering your home during outages.
Portability
With dimensions of L58.5 x W30.9 x H36.5 in, the traditional open frame design of the Generac GP18000EFI ensures stability while allowing easy maintenance access to components and promoting effective air cooling. The device has been designed for tough environments and demanding outdoor use.
While technically classified as 'portable' due to its ability to be moved, the 442.8 lbs of this generator may make manual lifting and transportation somewhat difficult. However, the lack of maneuverability can be offset with its wheel kit (⌀12") and its folding handle, which allows for convenient shifting once the generator is placed on the ground.
Features
The GP18000EFI's control panel
The control panel of the GP18000EFI includes a digital data center, which assists you in monitoring its status and activity, as it provides information on the lifetime run hours.
Thanks to its built-in fuel gauge, the generator allows you to quickly, conveniently, and easily check the gas level at a glance.
As for its security measures, the device features an overload protection (circuit breaker) and an automatic low oil shut-off, letting you use it with a peace of mind.
The GP18000EFI also benefits from Generac’s COsense® carbon monoxide monitoring. This technology senses and manages CO output and shuts down the unit when necessary, to protect you from CO poisoning.
Alongside the typical set of documentation and owner's manual (opens in a new tab) to assist with setup, Generac has included some oil in the packaging of the GP18000EFI.
The Generac GP18000EFI versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Generac GP18000EFI compare to generators of similar power (between 14000 and 22000 W).
- At a weight of 442.8 pounds, the Generac GP18000EFI places in the expected weight range of the generators in the 14000-22000 rated wattage range. Weight-conscious users may find the Westinghouse WGen14500TFc appealing, as it is one of the top contenders in this power range, weighing just 348.3 pounds.
- Regarding its autonomy, the GP18000EFI can run for around 9 hours at a 50% load, aligning it with the lower performers in its power range. Furthermore, considering the run times, one of the generators which have a roughly same power output, with the highest autonomy, is the Westinghouse WGen20000, as it provides around 11 hours.
- While run time is vital, it hinges on the fuel capacity. To grasp the full picture, we must also factor in fuel efficiency. When it comes to fuel efficiency among generators with similar wattage, this generator lags behind, with a consumption rate of 1.58 GPH at a 50% load. If you wish to get a unit of similar power, but with one of the best fuel efficiency, you could consider the Westinghouse WGen14500DFc, which has an impressively low fuel consumption of 0.95 GPH.
Price comparison
As you can see from these interactive charts, when compared to other 14000-22000W generators, the Generac GP18000EFI is on the average side of the price range.
Therefore, this generator nicely fits in the expected budget for this kind of product.
The bottom line
- In the expected price range
- COsense® technology
- GFCI Outlets
- 4 different AC outlet types
- G-Force engine made in USA
- Electric start
- Clean sine wave
- Electronic Fuel Injection
- Decent weight (442.8 lbs)
- No recoil back-up
- No remote start
- Relatively low run time
- Low fuel efficiency
Do you own the Generac GP18000EFI and agree (or disagree) with these strengths and weaknesses?
Let us know and write your own review.
Features and Specifications
| Inverter | No |
|---|---|
| Parallel capable | No |
| RV ready | No |
| Fuel | Gasoline |
| Engine | 816 cc Generac G-Force OVHI 4-stroke |
| Starting system | Electric |
| Warranty | 3 years |
| Voltage | AC: 120/240V 60 Hz |
|---|---|
| Running watts | 18,000 W |
| Starting watts | 22,500 W |
| Running amps (@120/240V) | 150/75 amps |
| Peak amps (@120/240V) | 187.5/93.8 amps |
| Run time @50% load | 9 h |
| Run time @25% load | Unknown |
| GFCI outlets | Yes |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Yes |
| AC outlets |
|
| DC outlets | No |
| Data center | Lifetime run hours |
| Indicators | No |
| Fuel tank | 14.2 gal |
| Fuel gauge | Yes |
| Weight | 442.8 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 58.5 x 30.9 x 36.5 in |
| Noise (lower limit) | Unknown |
| THD | < 5% |
| Compliance | CARB, EPA |
| Security | Low oil and overload protection, CO monitoring |
| Spark arrestor | Yes |
| Neutral | Bonded to frame |
| Accessories included | Oil, battery, and wheel kit |
| UPC | 696471101324 |
We've taken extra care to research and verify each of the specifications above. That said, occasional mistakes or omissions are still possible. If you spot any missing or inaccurate information, feel free to suggest a correction so we can address it.
About Generac
Generac Power Systems is an American based generator and power equipment manufacturer, founded in 1959. As its name suggests, the main focus of Generac are power generators, and other related electric equipment, such as switches, paralleling systems and small engines. The company has several manufacturing facilities based in the US, thus, their products are engineered and built in the USA. However, their components can be a mix of domestic and foreign parts.
Warranty Information
The Generac GP18000EFI is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Generac generators, please consult Generac's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-888-GENERAC (888-436-3722).
Questions & Answers
What can it power?
| Item | Running Watts | Starting Watts | |
|---|---|---|---|
| At home | Electric fry pan | 1500 | 1500 |
| Dish washer | 1500 | 3000 | |
| Microwave (1000 watts) | 1500 | 1500 | |
| AC (10,000 BTU) | 1500 | 2200 | |
| Sump pump (1/2 hp) | 1050 | 2150 | |
| Refrigerator (energy star) | 192 | 1192 | |
| Clothes dryer | 5400 | 6750 | |
| Electric grill | 1650 | 1650 | |
| Radio | 100 | 100 | |
| Total | 14392 W | 15892 W | |
| For work | Electric welder | 9000 | 9000 |
| Table saw | 1800 | 4500 | |
| Air compressor (1 hp) | 1600 | 6100 | |
| Grinder | 1400 | 2500 | |
| Drain cleaner | 250 | 250 | |
| Electric fence (25 miles) | 250 | 250 | |
| Bug zapper | 80 | 80 | |
| Total | 14380 W | 18880 W |
What is the noise rating of the GP18000EFI?
Due to the lack of standardization in noise emission measurement, Generac does not provide their units' noise levels.
Couldn't find the right answer for you? Ask your own question.
