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Generac

Generac Guardian 18kW Home Standby Generator with 200 Amp Transfer Switch - Automatic Whole House Backup Power for Storms, Emergencies, and Outages, WiFi Enabled, Runs on Natural Gas or Liquid Propane

  • Based on 26 reviews
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Availability: In Stock.
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Arrives Thursday, Nov 6
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Pattern Name: Generator


Style: 18kW + 200-Amp Switch


Features

  • Remote Monitoring Anywhere: With Generac 7228 18kW Mobile Link Wi-Fi connectivity, effortlessly track generator performance from anywhere. Stay updated on status and maintenance alerts, ensuring peace of mind even when youre away
  • Whole House Protection: Keep your home powered during outages with Generacs 200 Amp transfer switch, designed for seamless integration with whole house generators. Its durable aluminum enclosure ensures reliable outdoor use and coverage
  • Long-Term Assurance: Backed by a 5-Year Limited Warranty, this automatic transfer switch delivers lasting performance and peace of mind, ensuring your investment in a Generac transfer switch will serve you well for years
  • High-Quality 18kW Power: True Power Technology delivers clean, stable 18,000 watts with under 5% harmonic distortion. Generacs low-maintenance engines run quieter and use less fuel for efficient, reliable home power
  • Crafted for Excellence: Proudly engineered and assembled in the USA, our generators stand as testament to quality and craftsmanship. The purpose-built G-Force Engine is designed to handle the demands of usage, ensuring reliability and reduced maintenance
  • Easy Installation: Generac recommends your new Home Standby Generator to be installed by a certified and licensed electrician

Description

As the 1 selling home standby generator brand, Generac's Guardian Series generators provide the automatic backup power you need to protect your home and family during a power outage. Now coming with FREE Mobile Link, allowing you to monitor the status of your generator on a phone, tablet, or computer from anywhere in the world. Connected to your existing LP or natural gas fuel supply, it starts within seconds of sensing power loss - automatically - and runs for as long as necessary until utility power returns. Choose from just enough power to cover essential circuits or whole house coverage. Generac's Guardian Series offers benefits that few competitors can match. Engineered and built in the U.S.A., the new lineup of home standby generators are engineered to save you money on installation while offering the same reliability and peace of mind you get from all Generac home standby generators. Features that simplify the process for our installers include removable door panels, a base pad that requires minimal ground preparation and more efficient wiring techniques that save time on installation. Innovative engine design and rigorous testing are at the heart of Generac's success in providing the most reliable generators possible. Generac's G-force engine is purpose-built, capable of handling the rigors of generator use, resulting in power that is more reliable and requires less maintenance than any competitive engine. All backed by 24/7/365 customer support and a nationwide dealer network of more than 6,000 strong, the best in the market.

Brand: Generac


Wattage: 18000


Fuel Type: Natural Gas or LP Gas


Power Source: Natural Gas or LP Gas


Recommended Uses For Product: Residential use


Item Weight: 420 Pounds


Voltage: 240 Volts (AC)


Output Wattage: 18


Special Feature: Automatic Idle Control, Fully Enclosed Design, Super Quiet


Included Components: 200A Transfer Switch, 5 Year Limited Warranty


Brand: Generac


Wattage: 18000


Fuel Type: Natural Gas or LP Gas


Power Source: Natural Gas or LP Gas


Recommended Uses For Product: Residential use


Item Weight: 420 Pounds


Voltage: 240 Volts (AC)


Output Wattage: 18


Special Feature: Automatic Idle Control, Fully Enclosed Design, Super Quiet


Included Components: 200A Transfer Switch, 5 Year Limited Warranty


Color: Bisque


Product Dimensions: 25"L x 48"W x 29"H


Material: Aluminum


Model Name: 18kW Air Cooled Guardian Series


Engine Type: Generac G-Force 800 Series


Ignition System Type: Spark Ignition


Engine Displacement: 816 Cubic Centimeters


Total Power Outlets: 1


Engine Power Maximum: 18 Kilowatts


Starting Wattage: 1.8E+4 Watts


Running Wattage: 1.8E+4 Watts


UPC: 696471082586


Manufacturer: Generac


Item Weight: 420 pounds


Department: Unisex-Adult


Item model number: 7228


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Nov 6

This item is non-returnable:

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

View our full returns policy here.

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Top Amazon Reviews

    • A Totally Self-Contained Standby Generator
I used my electrician to do the majority of the install and startup, and our plumber to do the gas line off the meter to the generator. That last part was pricier than I had planned, but doing this to code is essential. After a short tutorial the electricians shut off power to the house and in about 15 seconds the generator kicked in and restored power to our house. The delay prevents momentary power losses, which happen more frequently, from causing a momentary restoration. When we returned normal power to the house, the generator shut down in about 30 seconds. The Auto Transfer Switch blocked any power from the generator instantly. I'm impressed with this setup. I must master the Mobile Link app to get this setup on my phone. UPDATE: Wednesday are still very impressed with the generator after four months and one 20-minute power outage. Everything in the house came back on. But you must restart your TVs and reset clocks around the house, no biggie. I have not included ACs in the circuit. But do have an estimate from my electrician - reasonable. The bi-weekly exercise of the generator (does not interfere with your regular power) are right on schedule and reported to the cellphone app. ... show more
Reviewed in the United States on April 11, 2025 by Thomas R.
    • Love having electric
Its a working. Shipped right to me
Reviewed in the United States on August 31, 2025 by james wilson, kim wilson
    • General generator will do the job
Although we haven’t had much opportunity to try the generator, I believe it will work well for us during power outages. It took several days to get here, but when completed everything worked just as it was supposed to.
Reviewed in the United States on April 29, 2024 by susan schlomer
    • Generator
Good product, have previously had one, I installed my self.
Reviewed in the United States on April 1, 2024 by dman
    • Kept our home livable during storms. Performs as advertised.
We bought our generator around 3 years ago and had it professionally installed with natural gas. Our house has a well and we work from home so no electricity means no water and no income. The 18kw model is large enough to power our average (2000 sq ft) house with gas appliances and forced air A/C. Generac recommends a Group 26R regular or Group 35 AGM auto battery. We opted for the wet cell 26R initally (cheaper) but have replaced it with an Odyssey AGM 35 battery for better cold weather performance and longevity. We've had a few short (1 day) outages but recently we had a 10 day outage. The generator performed flawlessly and was extremely efficient, consuming around 100 cu ft/hr, far less than the 169cu ft/hr rating at half load. This translated to around $25/day in our area. The transfer switch works flawlessly and transfers power to the generator after about 5 min. When running, lights will occasionally dim when our well pump motor starts up but not enough to cause a reset of our microwave clock. Nothing else was noticeable including hair dryers, electric pots, furnace, etc. Noise level is high, about the same as our Honda gas lawnmower. It is much louder on the exhaust (left) side. The system includes the Mobil Link app which connects via 2.4GHz wifi and reports back some basic parameters. The app is mostly useless but does a good job tracking maintenance and exercise cycles. The Oil and oil filter are supposed to be changed every year or 200 hours. Make sure to keep an extra filter on hand in case you run into an extended outage like we experienced. Fortunately Amazon was still operating during the outage and was able to deliver the parts. Your can use an OEM Generac 070185ES or an auto filter (find on the mfg. Cross Reference, we have used AC Delco and others). The OEM spark plugs are Champion RC14YC with a 0.020" gap. The Generac 6484 contains everything you need but oil for the B maintenance (4 yrs, 400 hours) and includes an air filter. Generac recommends SN or later 5w-20, but you can also use 0w-20 or 5w-30. We used Mobil1EP 0w-20 which also fits our cars. After 200 hours the oil looked new. The unit consumed only enough oil to go from the 'full' circle on the dipstick to the 'add oil' at the bottom of the dipstick. Overall, highly recommended. We have seen a few errors that were cleared via a reset sequence on the generator control panel. An exterior LED light will change color when maintenance is needed or there is an error. I just wish it was quieter. ... show more
Reviewed in the United States on April 13, 2025 by KK
    • never buy online
this generator started up twice, but since then, it won't run. Have purchased two brand new batteries and a code keeps coming up "low battery". now can't get generator to kick in. Installation was properly done by following the booklet instructions. Have called generac several times & not getting much help there. Had a generac technician come out & all he said was even though the wiring was done according to the booklet, that a 4 grade wiring was requiring, but he really didn't tell us why the generator wasn't kicking in. I am very frustrated & feel like I have wasted $5500. I purchased this item because my husband is a fully disabled vet & I wanted reassurance & security of having power. Not sure what else I can do. ... show more
Reviewed in the United States on August 2, 2024 by Kenneth Morey
    • RELIABLE
I've had a Generac 20kw standby for 12 years......NEVER a problem. It's run for a week at a time during hurricanes! I do the maintenance using synthetic oil and Wix filters and Champion plugs..Tech would charge hundreds!
Reviewed in the United States on February 20, 2025 by J. kneeland
    • Charging system wasn’t wired correctly
Generator is great! Had problems with the battery charger not working. Finally got it fixed under warranty. Factory didn’t ground the system. Works great now
Reviewed in the United States on December 7, 2023 by michael mihalic

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