Generac generator cost
For the 10 kW model, Generac's home standby generators start at $3,769. You also pay for an electrician, a fuel line, a pad and a permit.
Generac prices the 10 kW at $462 a kW and the 26 kW at $316 a kW. On November 1, 2026, the list prices were checked.
Installed prices across the list range from $8,419 to $18,209. Unsure which size to choose? Size your house in three questions.
List prices from Generac
| Size | Generator only | With transfer switch |
|---|---|---|
| Guardian 10 kW | $3,769 | $4,619 |
| Guardian 14 kW | $4,889 | $5,949 |
| Guardian 18 kW | $5,709 | $6,769 |
| Guardian 22 kW | $6,309 | $7,369 |
| Guardian 24 kW | $6,729 | $7,789 |
| Guardian 26 kW | – | $8,219 |
| Guardian 28 kW | $8,159 | $9,509, with an ecobee thermostat |
MSRP (starting at) from Generac's manufacturer MSRP page.
Installed costs by size
| Model | Installed, natural gas | Installed, propane |
|---|---|---|
| Guardian 10 kW, with switch | $8,419 to $13,319 | $8,719 to $13,819 |
| Guardian 14 kW, with switch | $9,749 to $14,649 | $10,049 to $15,149 |
| Guardian 18 kW, with switch | $10,569 to $15,469 | $10,869 to $15,969 |
| Guardian 22 kW, with switch | $11,169 to $16,069 | $11,469 to $16,569 |
| Guardian 24 kW, with switch | $11,589 to $16,489 | $11,889 to $16,989 |
| Guardian 26 kW, with switch | $12,019 to $16,919 | $12,319 to $17,419 |
| Guardian 28 kW and ecobee thermostat, with switch | $13,309 to $18,209 | $13,609 to $18,709 |
The US average electrician wage is used for these labor costs. Find your state's wage on the state pages.
What affects the price of the Guardian 22 kW?
| Line, 22 kW | Natural gas | Propane | Basis |
|---|---|---|---|
| Generator and transfer switch | $7,369 | $7,369 | Generac list price, with switch |
| Electrician: switch, wiring, start-up | $3,000 to $5,500 | $3,000 to $5,500 | The US average hourly wage of $34.37 (BLS) is used to set the published install ranges. |
| Fuel line | $500 to $2,000 | $800 to $2,500 | A gas line runs from the meter; a propane line runs from the tank. |
| Pad and permit | $300 to $1,200 | $300 to $1,200 | composite pad or slab, local fees |
| Installed | $11,169 to $16,069 | $11,469 to $16,569 | propane leaves out the tank |
Generac fuel use per hour by size
The figures use EIA US average prices and assume half load. Generac posts a fuel table for every model. For the 26 kW, 18 kW and 24 kW models, each has a per-hour rating no higher than the next smaller size, so hourly fuel use doesn't grow in step with kW.
| Model | Natural gas | Gas cost | Propane | Propane cost | 500 gal tank |
|---|---|---|---|---|---|
| Guardian 10 kW | 101 ft³ | $2.21 | 0.97 gal | $2.65 | 412 h |
| Guardian 14 kW | 195 ft³ | $4.27 | 1.81 gal | $4.94 | 221 h |
| Guardian 18 kW | 169 ft³ | $3.70 | 1.70 gal | $4.64 | 235 h |
| Guardian 22 kW | 204 ft³ | $4.47 | 2.53 gal | $6.91 | 158 h |
| Guardian 24 kW | 203 ft³ | $4.45 | 2.53 gal | $6.91 | 158 h |
| Guardian 26 kW | 188 ft³ | $4.12 | 2.06 gal | $5.62 | 194 h |
Generac provides a fuel table for every model, and the tank is filled to 80%. The generator fuel consumption and generator propane tank resources cover every generator size and load.
Noise levels published
| Model | Lowest | Running | Measured at |
|---|---|---|---|
| Guardian 10 kW | 57 dB(A) | 61 dB(A) | 23 ft |
| Guardian 14 kW | 55 dB(A) | 65 dB(A) | 23 ft |
| Guardian 18 kW | 55 dB(A) | 65 dB(A) | 23 ft |
| Guardian 22 kW | 57 dB(A) | 67 dB(A) | 23 ft |
| Guardian 24 kW | 57 dB(A) | 67 dB(A) | 23 ft |
| Guardian 26 kW | 57 dB(A) | 67 dB(A) | 23 ft |
The Generac spec sheets supply these numbers for every model priced above. The generator decibel chart compares every brand side by side.
Other generator brands
| Brand | Sizes | List price from | Quietest, dB(A) | Page |
|---|---|---|---|---|
| Generac | 10 to 28 kW | $3,769 | 55 | Generac cost |
 Kohler | 14 to 26 kW | $5,098 | 56 | Kohler cost |
 Cummins | 20 to 30 kW | through dealers | 60 | Cummins cost |
 Briggs & Stratton | 20 to 26 kW | through dealers | 65 | Briggs & Stratton cost |
 Champion | 14 kW | through dealers | 62 | Champion cost |
At 23 ft, the quietest rating comes from the lowest published noise level, usually during the weekly exercise run. Manufacturers list prices on their own pages. Cummins, Briggs & Stratton and Champion use dealers, who quote the unit price.
Compare these brands: Generac vs KohlerBriggs & Stratton compared with GeneracCummins compared with GeneracChampion compared with Generac