Generac Guardian 22kW
Standby generator. Specs from the manufacturer page (checked ).

The Generac Guardian 22kW is a standby generator with 22,000 W rated running output. It runs on liquid propane or natural gas and has built-in cellular connectivity for monitoring and control through Mobile Link. It comes with a 5-year limited warranty.
Key features
- Rated running output of 22,000 W on liquid propane; rated maximum continuous power is 22 kW on liquid propane and 21 kW on natural gas
- Dual fuel: runs on liquid propane or natural gas, with fuel pressure requirements of 10 wc (LP) and 3.5 wc (NG)
- Electronic fuel and ignition control, which the page says optimizes fuel use and lowers emissions on average versus Generac Guardian Series standby generators
- Built-in cellular connectivity for monitoring and control with Mobile Link; real-time updates and maintenance alerts require a Mobile Link premium subscription
- Oil level sensors monitor oil level; oil capacity is 2.2 qt (2.1 L)
- Improved cold start performance for start-up in cold climates
- Sloped roof and rear air intake to reduce risk of snow and ice intrusion
- Compatible with ecobee by Generac thermostats and Generac PWRcell battery systems
What it is for
- Home back-up power
Specifications
| Running watts | 22000 W |
|---|---|
| Fuel | dual-fuel |
| Weight | 205 kg (451.9 lb) |
| Dimensions | 117.9 × 66.8 × 77.9 cm (46.4 × 26.3 × 30.7 in) |
| Warranty | 5 years |
From the Generac page. Values the manufacturer does not publish are left out.
Similar standby generators
Champion aXis 22kW
Generac Guardian 24kW
Generac Guardian 18kW
Generac Guardian 26kW
Briggs & Stratton PowerProtect 22kW
Briggs & Stratton PowerProtect+ DX 22kW
Cummins C20N6HC
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Connection and wiring
Follow the diagrams in the Generac manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
Open the Generac manual (PDF) →
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| Auxiliary Shutdown | Active alarm that must be cleared before the generator can start. | Verify the controller-face emergency shutdown switch is ON (I). Clear the alarm. If equipped, the rocker switch must be set to ON (I) to clear it. | 17 |
| Overcrank | Fault during initial startup. The generator may exceed the normal number of start attempts because air accumulated in the fuel system during installation. | Reset the alarm and restart up to two more times, if necessary. If the unit still fails to start, contact an IASD for assistance. Call service if it persists. | 19 |
| Battery Problem | Listed as a warning. Warnings do not disable the unit or require immediate correction. No specific description given. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
| Canbus Error | Listed as a warning. Warnings alert the operator to conditions that do not disable the unit or require immediate correction. No specific description given. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
| Charger Missing AC | Listed as a warning. Warnings do not disable the unit or require immediate correction. No specific description given. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
| Charger Warning | Listed as a warning. Warnings do not disable the unit or require immediate correction. The manual notes a warning appears when the battery requires service. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
6 of 54 codes. From the Generac manual. All 54 Guardian 24kW / Guardian 22kW / Guardian 26kW / Guardian 18kW codes →
FAQ
Can the Generac Guardian 22kW start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 22000 W output (no separate peak published). That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.