How much does a 24kW Generac cost installed?

The dataset records no model-specific turnkey band for the Guardian 24kW; whole-house standby installs in this class run $9,000–$25,000+ installed per the standby hub (unit, ATS, electrical, gas, site prep, permits). Unit pricing is below.

How much does the Generac Guardian 24 kW Standby Generator cost installed?

Installed cost depends on site conditions — the transfer switch, electrical work, gas plumbing, and permits typically add 50–60% to the equipment price.

Is the Generac Guardian 24 kW Standby Generator enough to power a whole house?

Largest common residential air-cooled standby generator, 24 kW class, for larger homes or natural-gas installs needing more real output. 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 24 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 24 kW Standby Generator cost & price guide

Updated September 2026

Standby generator installed beside a home

The Generac Guardian 24 kW runs about $6,269 for the unit — a reported range of $5,939–$6,599 — and $6,875–$7,789 with the 200A smart transfer switch bundle. It is the largest air-cooled Guardian,Generac's whole-house tier for larger homes; no turnkey installed band is recorded for this model row in the dataset, so installed cost is quoted from the standby hub's ranges rather than invented.

What you should expect to pay

MSRP: Not published
Unit (est.): $6,269
Installed (est.): —
90-day low: —

Unit-only range reported $5,939-$6,599 (midpoint 6,269). Unit + 200A smart transfer switch $6,875-$7,789.

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

MSRP: Not published
Unit (est.): $6,269 (range $5,939–$6,599)
Unit + 200A smart switch: $6,875–$7,789
Installed (est.): Not recorded in the dataset — see the standby hub's installed-cost ranges
90-day low: $5,939
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 (bundle $6,875–$7,789 with the unit), the electrical work, the gas plumbing run sized for the 24 kW fuel demand, the concrete pad and site prep, and the municipal permit. The standby hub prices those adds — installation typically runs $4,000–$9,000 on top of the unit, with complex installs exceeding $10,000.

Reported prices

$5,939 (low) — Unit only, low end.

Observation row generac-guardian-24kw (typical_street 6,269; sources: Generac cost guides, The Home Depot listings).

Specs

Rated Output Kw: 24
Rated Output Kw Ng: 21
Fuel Options: natural gas, liquid propane
Cooling: air-cooled
Transfer Switch A: 200
Typical Home Sqft: 3000-3500+

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 24kW Generac cost installed?: The dataset records no model-specific turnkey band for the Guardian 24kW; whole-house standby installs in this class run $9,000–$25,000+ installed per the standby hub (unit, ATS, electrical, gas, site prep, permits). Unit pricing is below.
How much is the Generac Guardian 24kW unit itself?: About $6,269 — a reported range of $5,939–$6,599 unit-only, or $6,875–$7,789 with the 200A smart transfer switch bundle (dealer/retailer listings, low-confidence aggregate).
How much does the Generac Guardian 24 kW Standby Generator cost installed?: Installed cost depends on site conditions — the transfer switch, electrical work, gas plumbing, and permits typically add 50–60% to the equipment price.
Is the Generac Guardian 24 kW Standby Generator enough to power a whole house?: Largest common residential air-cooled standby generator, 24 kW class, for larger homes or natural-gas installs needing more real output. 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 24 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)
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.