How much does a 22kW Generac generator cost installed?

The standby hub's tier bands put mid-size air-cooled installs in the $10,000–$18,000 range depending on switch class and site work. For this exact model the dataset records the unit band ($5,570–$6,189) and the 200A smart-switch bundle ($6,500–$7,369) but no turnkey figure — dealers quote installation.

How much does the Generac Guardian 22 kW Standby Generator cost installed?

Expect roughly $6,935 installed, including the unit, automatic transfer switch, electrical work, gas plumbing, and site prep. Your local quote varies with the length of the gas and electrical runs and any panel upgrades.

Is the Generac Guardian 22 kW Standby Generator enough to power a whole house?

Best-selling residential air-cooled standby generator, 22 kW class, typically paired with a 200A smart transfer switch. Whole-house coverage depends on your load calculation; a licensed installer will size it against your panel and largest appliances.

What does the Generac Guardian 22 kW Standby Generator cost to run?

Running cost depends on fuel and load. On natural gas, expect roughly $20–$60 per day of continuous operation for an air-cooled unit, plus a few dollars a month for weekly self-tests and $200–$500 a year for maintenance.

Generac Guardian 22 kW Standby Generator cost & price guide

Updated September 2026

Standby generator installed beside a home

The Generac Guardian 22 kW — Generac's best-selling residential air-cooled unit — runs about $5,879 for the unit, from a reported unit-only range of $5,570–$6,189, with a unit + 200A smart transfer switch bundle at $6,500–$7,369 (midpoint $6,935). No turnkey installed band is recorded for this row; the installed figure stays open rather than borrowed from another brand's band. Specs: 22 kW rated (19.5 kW on natural gas), air-cooled, 200A smart transfer switch, sized for roughly 2,500–3,500 sq ft.

What you should expect to pay

MSRP: Not published
Unit (est.): $5,879
Installed (est.): ~$6,935
90-day low: —

Unit-only range reported $5,570-$6,189 (midpoint 5,879). Unit + 200A smart transfer switch $6,500-$7,369.

Confidence: low · Data as of 2026-09-17

MSRP: Not published
Unit (est.): $5,879 (range $5,570–$6,189)
Unit + 200A smart switch: $6,500–$7,369 (midpoint $6,935)
Installed (est.): Not recorded in the dataset
90-day low: —
Confidence: low · Data as of 2026-09-17

Cost to install

Installation is what turns the unit price into a working standby system: the 200A smart transfer switch, the electrical work between switch and panel, the gas plumbing run, the concrete pad and site prep, and the municipal permit. The standby hub's cost-driver section prices those adds — installation typically runs $4,000–$9,000 on top of the unit, and complex installs with panel upgrades or long gas runs can exceed $10,000. A model-specific turnkey band for this row is not recorded; dealers quote installation per site, and the natural-gas derate (19.5 kW) affects sizing, not the install price.

Reported prices

$5,570 (low) — Unit only, low end of reported range.
$6,935 (other) — Unit + 200A smart switch midpoint ($6,500-$7,369).

Observation row generac-guardian-22kw (sources: UDPWR cost guide, AA Power, The Home Depot listings).

Specs

Rated Output Kw: 22
Rated Output Kw Ng: 19.5
Fuel Options: natural gas, liquid propane
Cooling: air-cooled
Transfer Switch A: 200
Typical Home Sqft: 2500-3500

Where to buy

Electric Generators Direct — Specialist retailer, broad air- and liquid-cooled stock
Home Depot — Generac and other air-cooled models, often in stock
Lowe's — Generac and Briggs & Stratton, in-store pickup
Generac (manufacturer) — Find a certified dealer for installed quotes

Frequently asked questions

How much does a 22kW Generac generator cost installed?: The standby hub's tier bands put mid-size air-cooled installs in the $10,000–$18,000 range depending on switch class and site work. For this exact model the dataset records the unit band ($5,570–$6,189) and the 200A smart-switch bundle ($6,500–$7,369) but no turnkey figure — dealers quote installation.
How much is the Generac Guardian 22kW unit itself?: About $5,879 — a reported unit-only range of $5,570–$6,189, with a unit + 200A smart transfer switch bundle at $6,500–$7,369 (midpoint $6,935). Rated 19.5 kW on natural gas.
How much does the Generac Guardian 22 kW Standby Generator cost installed?: Expect roughly $6,935 installed, including the unit, automatic transfer switch, electrical work, gas plumbing, and site prep. Your local quote varies with the length of the gas and electrical runs and any panel upgrades.
Is the Generac Guardian 22 kW Standby Generator enough to power a whole house?: Best-selling residential air-cooled standby generator, 22 kW class, typically paired with a 200A smart transfer switch. Whole-house coverage depends on your load calculation; a licensed installer will size it against your panel and largest appliances.
What does the Generac Guardian 22 kW Standby Generator cost to run?: Running cost depends on fuel and load. On natural gas, expect roughly $20–$60 per day of continuous operation for an air-cooled unit, plus a few dollars a month for weekly self-tests and $200–$500 a year for maintenance.

Related guides

Whole-house standby generator cost — the standby hub: unit and installed cost at a glance, cost drivers, and model-by-model comparisons.
Roof replacement costs — installed cost per square for asphalt, metal, and tile roofs, plus tear-off and pitch.
Roof replacement cost calculator — estimate your own roof by size, material, tear-off layers, pitch, and stories.
Driveway & concrete flatwork costs — asphalt, concrete, and paver pricing per square foot; the same flatwork family as the poured pad your standby unit sits on.

Sources

UDPWR - Generac generator cost, what homeowners pay (2026) (low reliability)
AA Power - Generac 22kW standby generator (retail) (medium reliability)
The Home Depot - Generac home standby generators (medium reliability)

About this data

Prices are aggregated from public dealer and retailer listings and are indicative, not quotes. Manufacturers often do not publish MSRP for dealer-installed equipment.

[high] unverified: All equipment prices are aggregated secondary ranges, NOT verified manufacturer MSRP. Midpoints are arithmetic means of reported ranges. Requires dealer/manufacturer verification before publishing as authoritative pricing.