A 20 kW Kohler whole-home standby generator with corrosion-resistant aluminum enclosure, 200 A automatic transfer switch, OnCue Plus monitoring and a 5-year limited warranty.
This standby generator must be installed by a licensed electrician and certified gas technician in compliance with local codes (NEC, IFGC). A permit and inspection may be required in your jurisdiction.
Kohler’s 20RCAL is the model contractors most often recommend when a homeowner asks for the most reliable mid-size standby generator on the market. Kohler has been making industrial-grade engines for nearly a century, and the 20RCAL brings that engineering pedigree into a residential package. Output is 20 kW on liquid propane (18 kW on natural gas), enough to back up a typical 2,500–3,500 sq ft home in its entirety.
The bundled 200 A automatic transfer switch handles whole-house service. Within seconds of detecting a utility outage, the generator starts, transfers the home’s panel to standby power and continues running until the grid is restored. There is no load-shedding required for an average home — your AC, refrigerator, well pump, lights and outlets all run simultaneously.
The corrosion-resistant aluminum enclosure is engineered for coastal and high-humidity climates and stands up to year-round outdoor exposure. Kohler’s OnCue Plus app provides remote monitoring of run status, exercise schedules and maintenance reminders. The 999cc Kohler V-Twin engine uses pressurized lubrication and a hydraulic valve lifter system, the kind of features normally seen on commercial-grade equipment, for long service intervals and quiet operation.
Backed by a 5-year limited residential warranty.
Key Specifications
- Output: 20 kW (LP) / 18 kW (NG)
- Engine: Kohler 999cc V-Twin OHV, pressurized lubrication
- Transfer switch: 200 A whole-house, included
- Connectivity: OnCue Plus monitoring
- Enclosure: corrosion-resistant aluminum
- Warranty: 5-year limited residential
Frequently Asked Questions
Does this include professional installation?
No. Standby generators must be installed by a licensed electrician and, where applicable, a licensed plumber.
Is a transfer switch included?
Some packages include a transfer switch. Please review the product details carefully — if a transfer switch is not listed, it is sold separately.
⚠️ California Proposition 65 Warning
This product can expose you to chemicals including engine exhaust, lead, and lead compounds, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands after handling. For more information visit
www.P65Warnings.ca.gov.
Product details
