by Kohler
Kohler 20RCA
20 kW standby generator
Key specifications
- Rated output, propane
- 20 kW
- Rated output, natural gas
- 18 kW
- Fuel
- Dual fuel (NG / LP)
- Phase
- Single-phase
- Transfer switch
- Not included
- MSRP (starting)
- $5,813
- Dimensions
- 47 x 26.0 x 32.3 in
- Shipping weight
- 567.5 lb
- Engine displacement
- 999 cc
- Sound, running (23 ft)
- 70 dB
- Sound, exercise (23 ft)
- 66 dB
- Warranty
- 5 years
Unverifiable specs are omitted, not estimated. See sources below for what we can defend.
Fuel use
| Fuel | Half load | Full load |
|---|---|---|
| Propane | 2.24 gal/hr | 3.72 gal/hr |
| Natural gas | 161 ft³/hr | 281 ft³/hr |
On propane, a 500-gallon tank filled to 80% holds about 400 gallons. That runs the Kohler 20RCA for about 179 hours (7.5 days) nonstop at half load, or about 108 hours (4.5 days) at full load. See how much propane a generator uses for other tank sizes.
On natural gas, the gas line and meter have to deliver the full-load figure, 281 ft³/hr, even if the generator rarely runs that hard. Installers size the pipe to it.
Kohler publishes propane use in cubic feet per hour. Gallons are converted at Kohler's 2,500 Btu per cubic foot and the EIA's 91,452 Btu per gallon.
Sources
Every spec above traces back to one of these citations.
- Kohler Home Energy (Rehlko) — Kohler 20RCA product page · checked July 2026
- Kohler (Rehlko) spec sheet G4272: 20RCA(L) · checked September 2026
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