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Generac Guardian 22KW Home Standby Generator

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Generac Guardian 22KW Home Standby Generator for sale

Reliable whole‑house backup power with the Generac Guardian 22kW automatic home standby generator, air‑cooled, WiFi‑enabled, and running on natural gas or liquid propane for seamless protection during outages.

Guardian 22KW Home Standby Generators

The Generac Guardian 22kW Home Standby Generator is one of the most powerful air‑cooled residential generators, designed to supply whole‑house backup power for many medium to large homes. Powered by Generac’s G‑Force series engine and compatible with natural gas (NG) or liquid propane (LP), it starts automatically within seconds of an outage and runs continuously until utility power is restored. Integrated Mobile Link WiFi monitoring lets you check generator status, alerts, and maintenance reminders from your smartphone, tablet, or PC. Generac Guardian 22KW Home Standby Generator for sale

Its aluminum, corrosion‑resistant enclosure and composite mounting base are built for long‑term outdoor installation in harsh weather. True Power Technology delivers cleaner power with low total harmonic distortion, helping protect sensitive electronics and modern appliances. With automatic digital voltage regulation and advanced load management (when paired with a compatible transfer switch), this generator is an ideal whole‑home solution for residential, light commercial, and small office backup applications.

Key features

22kW air‑cooled home standby generator for whole‑house backup (LP), approx. 19.5–21kW on natural gas depending on configuration.
Automatic start and stop during utility power outages when used with an automatic transfer switch.
Dual‑fuel operation: runs on existing natural gas line or LP (vapor) supply.
Generac G‑Force 1000 series 999cc V‑Twin engine designed for standby duty with full‑pressure lubrication.
Mobile Link WiFi connectivity for remote monitoring via smartphone, tablet, or PC (internet and router required).
True Power Technology with low THD (typically under 5%) for cleaner, utility‑grade power to protect electronics.
Evolution digital controller with multilingual LCD display for easy status viewing and diagnostics.
Aluminum, powder‑coated enclosure with composite mounting pad for corrosion resistance and durability.
Quiet‑Test mode for lower‑speed, quieter weekly self‑test operation.
Designed and assembled in the USA using domestic and foreign components.

Technical specifications

Electrical specifications

Rated power (LP): 22 kW / 22,000 W (single‑phase, 120/240 V, 60 Hz).
Rated power (NG): approx. 19.5–21 kW depending on specific model (commonly 19.5 kW for 7042/70422 and 21 kW on some current Guardian variants).
Voltage: 120/240 V single‑phase.
Frequency: 60 Hz.
Rated current (approx.): up to about 91–100 A per leg at 240 V (model dependent, often paired with 100–200 A or 400 A ATS).
Main line circuit breaker: commonly 100 A on the generator (varies by package).
Power factor: 1.0 (resistive rating).
Total harmonic distortion: typically <5% THD with True Power Technology.

Engine & performance

Engine brand / type: Generac G‑Force 1000, 4‑cycle, V‑Twin.
Displacement: about 999 cc (0.999 L).
Engine speed: 3600 RPM.
Fuel type: Natural Gas (NG) or Liquid Propane (LP vapor).
Starting system: 12 V automatic electric start (battery required, typically Group 26R or Group 35 AGM).
Recommended battery: 12 V, Group 26R (approx. 540 CCA minimum) or Group 35 AGM (approx. 650 CCA minimum), not always included.
Lubrication: full‑pressure lubrication with oil filter, extended oil change interval (often up to 2 years under normal residential usage).
Cooling system: air‑cooled.

Fuel consumption (approximate)

Values vary slightly by specific model and conditions; below are typical ranges for a 22kW Guardian at 60 Hz.

NG consumption at 50% load: about 200–230 ft³/hr.
NG consumption at 100% load: about 300–330 ft³/hr.
LP consumption at 50% load: about 2.5–2.6 gal/hr (roughly 85–95 ft³/hr).
LP consumption at 100% load: about 3.7–3.9 gal/hr (roughly 130–145 ft³/hr).

(You can adjust to exact published numbers for the exact SKU you stock, e.g., 7042 vs 7043 vs 70422.)

Dimensions & weight

Length: 48 in (121.9 cm).
Width: 25 in (63.5 cm).
Height: 29 in (73.7 cm).
Weight: approx. 466 lb (211 kg).

Enclosure & installation

Enclosure material: corrosion‑resistant aluminum, powder‑coated.
Base: composite “direct‑to‑dirt” mounting pad included on many packages.
Installation: outdoor, permanent installation by licensed electrician/plumber per local codes.
Cooling: air‑cooled with sound‑attenuating enclosure.

Controls & monitoring

Controller: Evolution or Evolution 2.0 digital controller.
Display: 2‑line multilingual LCD for status, utility and generator voltages, frequency, and error codes.
Weekly self‑test: selectable Quiet‑Test mode at reduced RPM for lower noise.
Connectivity: built‑in WiFi (Mobile Link) for remote monitoring.

Protection & certifications

Generator protection: low oil pressure shutdown, high temperature shutdown, over‑speed/under‑speed, over‑voltage/under‑voltage, over‑crank protection.
Circuit breaker: integrated main line breaker on generator output (typically 100 A).
Enclosure rating: suitable for outdoor installation (often NEMA 3R‑type weather‑resistant design with aluminum housing).
Listings: UL/ETL and CSA approvals (varies by region). Generac Guardian 22KW Home Standby Generator for sale