Generac Guardian Standby Gener...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$7,905.71
$7,498.75
GENERAC 70422 Guardian 22kW Home Backup Generator WiFi-Enabled

Generac Guardian Standby Generator 22kW 240V Natural Gas WiFi-Enabled Home Backup

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Model: 70422
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$7,905.71
$7,498.75
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Generac Guardian 22kW Home Backup Generator WiFi-Enabled

Professional Standby Generator with Advanced Power Management

The Generac Guardian 22kW Home Backup Generator delivers reliable whole-house backup power and exceptional performance for residential applications. This standby generator provides dependable power generation solutions designed for homeowners seeking comprehensive backup power protection, offering the proven reliability and advanced engineering that customers trust from America's leading generator manufacturer.

Professional Features & Benefits

Advanced Power Performance

  • 22kW Rated Power Output - Delivers substantial backup power capacity with 240V electrical output and 81.3-91.7 amperage range for comprehensive whole-house power protection
  • True Power Technology - Provides best-in-class power quality with less than 5% total harmonic distortion for clean, smooth operation of sensitive electronics and appliances
  • G-Force Engine Technology - Purpose-built, pressure-lubricated engine capable of handling generator use rigors, delivering more reliable power with reduced routine maintenance requirements
  • WiFi-Enabled Smart Controls - Evolution Controller features multilingual LCD display for monitoring battery status and tracking maintenance intervals to ensure optimal operating condition

Professional Installation & Operation

  • Automatic Standby Operation - Seamlessly activates during power outages to provide uninterrupted home power protection without manual intervention
  • Durable All-Aluminum Construction - RhinoCoat powder-coated finish provides corrosion-resistant protection perfect for all weather conditions with bisque color finish
  • Comprehensive Safety Certifications - CSA certified and UL listed for professional installation compliance and operational safety assurance

Technical Specifications

Rated Power: 22,000 watts standby capacity, Voltage Rating: 240V electrical output, Current Range: 81.3-91.7 amperage, Dimensions: 48.0" length x 25.0" width x 29.0" height, Weight: 448.0 lbs operational weight (476.0 lbs assembled), Frame Material: Aluminum construction with RhinoCoat powder coating, Color: Bisque finish, Certifications: CSA certified and UL listed, Warranty: 5-year limited warranty coverage, Country of Origin: Engineered and built in USA using domestic and foreign parts.

Installation & Operation

  1. Select appropriate outdoor location with proper clearances for standby generator installation and ventilation requirements
  2. Install automatic transfer switch by qualified electrician to integrate with home electrical panel for seamless power switching
  3. Connect natural gas or propane fuel supply line according to local codes and manufacturer specifications for reliable fuel delivery
  4. Configure Evolution Controller settings and WiFi connectivity for remote monitoring and maintenance tracking capabilities
  5. Test automatic operation and verify proper load transfer to ensure reliable backup power system performance
  6. Schedule regular maintenance intervals using controller tracking system to maintain optimal generator performance and warranty compliance

Professional Applications

Ideal for:

  • Whole House Backup Power - Complete residential power protection for homes requiring comprehensive electrical system backup during extended outages
  • Essential Systems Protection - Critical home systems including HVAC, refrigeration, lighting, security systems, and medical equipment power continuity
  • Home Office Operations - Uninterrupted power for remote work setups, computer systems, internet connectivity, and business continuity requirements
  • Family Comfort & Safety - Maintaining normal household operations during storms, grid failures, and emergency situations for family security
  • Property Value Enhancement - Permanent backup power installation that increases home value and provides long-term power security investment
  • Seasonal Home Protection - Reliable power for vacation homes, seasonal properties, and remote residences requiring dependable backup power
  • Medical Equipment Support - Critical power backup for home medical devices, oxygen concentrators, and health monitoring equipment
  • Smart Home Integration - WiFi-enabled monitoring and control integration with modern home automation and security systems

Standby Generator Advantage

Generac's standby generator technology provides automatic power protection that activates within seconds of detecting utility power loss, ensuring seamless transition without manual intervention. The permanent installation eliminates the need for portable generator setup during emergencies, while the automatic transfer switch safely isolates your home from the utility grid and manages power switching for complete electrical system protection.

Why Choose Generac Quality?

Generac's commitment to reliable power generation spans decades of engineering excellence, with advanced G-Force engine technology and comprehensive testing ensuring dependable backup power solutions for homes and businesses. As America's #1 selling generator brand, Generac provides innovative features like True Power Technology for clean electrical output, Evolution Controller for intelligent system management, and nationwide service network support. The 5-year limited warranty, combined with 24/7/365 customer support from Wisconsin headquarters, demonstrates Generac's dedication to long-term customer satisfaction and reliable power generation performance.



GENR-70422 - spec sheet

Manufacturer Resources

Product Specs

Assembled Weight:
476.0 lbs
Color Finish:
Bisque
Contains Chemicals That Cause Birth Defects Calif Prop65 :
No
Country Of Origin:
United States
Current Range:
81.3-91.7 A
Does This Product Have A Warranty :
Yes
Frame Material:
Aluminum
Manufacturer Warranty:
5 year warranty
Rated Wattage:
22000
Restrictions:
No
Voltage Rating:
240
Department:
Electrical
Product Group:
Power Equipment
Product Subgroup:
Generator
Product Length:
48.0 in
Product Height:
29.0 in
Product Weight:
448.0 lbs
Product Width:
25.0 in

Generac 70422 – Frequently Asked Questions

1) How much clearance space do I need to set a Generac Guardian 22kW standby generator, and what are its footprint dimensions?
The 70422 Guardian measures 48 inches long by 25 inches wide by 29 inches high, so plan the pad for a 48 x 25 inch footprint plus whatever clearance your local code and the manufacturer's installation instructions require on each side. It is an outdoor, permanently mounted unit, so the location has to allow airflow around the enclosure and access to the fuel connection and the controller face. Set weight is the other planning number: 448 lbs for the generator itself, 476 lbs assembled, which is more than two people should be sliding onto a pad by hand.
2) What size transfer switch and breaker do I need for a 22kW Generac Guardian?
Size the switchgear to the generator's output: 22,000 watts at 240 volts, with a rated current range of 81.3 to 91.7 amps. At 240V single phase, 22kW works out to about 91.7 amps, which is the top of that stated range, so the transfer switch and generator breaker have to be rated above that continuous load. The transfer switch is a separate item and is not supplied with the generator, and the description calls for a qualified electrician to install it and tie it into the home panel.
3) Can the Generac Guardian 70422 run on propane, or is it natural gas only?
The 70422 is a dual fuel capable standby unit: the installation sequence calls for connecting either a natural gas or an LP (propane) supply line, run to local code and to the manufacturer's spec. That matters for a property with no gas main, where a buried or above ground propane tank is the fuel source. Whichever fuel you connect, the gas piping and regulator have to be sized for the unit's full load, so the fuel run is part of the install cost, not an afterthought.
4) Is a 22kW standby generator enough to back up a whole house, or should I just do essential circuits?
At 22kW and roughly 91.7 amps at 240V, the 70422 is sized for whole house backup on a typical single family home, including central air, refrigeration, lighting, well or sump pumps, and a home office. The practical question is whether your calculated load fits under that, not whether the generator is automatic: it is, and it transfers without anyone touching it. If your service has two large AC compressors, electric range, electric water heater, and an EV charger all wanting to run at once, you either step up in kW or use a transfer switch with load management so the big loads are shed rather than stacked.
5) Is the Generac 22kW Guardian generator UL listed and CSA certified for a permitted installation?
Yes, the Guardian 70422 is CSA certified and UL listed, which is what an inspector or an institutional facility spec normally wants to see on a permanently installed standby set. Country of origin is the United States. Note the enclosure separately if you are specifying for a coastal or wash down site: it is aluminum with a powder coated finish rather than steel.
6) What does the WiFi on a Generac Guardian actually do, and can I monitor it from off site?
The Guardian 70422 uses Generac's Evolution controller with a multilingual LCD and built in WiFi, so once it is on the home network you can see status remotely instead of walking out to the unit. On the controller itself the display reports battery condition and tracks maintenance intervals. For a property manager with units at several addresses, or an owner of a seasonal or vacation home, that remote view is the difference between finding out about a dead start battery now and finding out during the next storm.
7) Will a standby generator run sensitive electronics, medical equipment, and computers without damaging them?
Output on the 70422 is held to less than 5 percent total harmonic distortion under Generac's True Power technology, which is the number that decides whether electronics tolerate generator power. Under 5 percent THD is clean enough for computers, network gear, home medical devices such as oxygen concentrators, variable speed HVAC, and modern appliance control boards. This is the main reason a permanently installed standby set is a different proposition from a jobsite portable feeding a house through extension cords.
8) How do I order the right Generac Guardian 22kW, and is the transfer switch included?
Order by model 70422, the 22kW 240V Guardian in bisque. The generator ships as the unit itself; the automatic transfer switch, the fuel line and regulator, and the pad are separate and get specified to the job. That is the sequence a contractor should quote: pad and clearances, transfer switch tied to the panel by a licensed electrician, gas or LP line run to code, then controller and WiFi setup and a load transfer test before signing off.
9) Will a standby generator enclosure hold up outdoors near the coast or in a wet climate?
The 70422 enclosure is all aluminum with a RhinoCoat powder coated finish, so there is no steel shell to rust through the way a painted steel enclosure does in salt air or under constant sprinkler wetting. Finish color is bisque, which is the point worth checking against an HOA or architectural review before it lands on the pad, since it is a fixed exterior color and not something you repaint without voiding the coating.
10) Is a Generac Guardian standby unit safe to use in California, and are there shipping restrictions?
The 70422 carries no product restrictions and is not flagged as containing chemicals known to cause birth defects under California Proposition 65, so there is no Prop 65 warning attached to the unit. Local siting, setback, and gas permitting rules still govern where it can be installed, and those are handled by the installing contractor rather than the product spec.
How fast can I get the Generac 70422 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Generac 70422 come with a warranty?
Absolutely. The Generac 70422 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Generac 70422?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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