The Kohler 20RCA produces 20kW on propane and 18kW on natural gas. It uses a CH1000, 999cc V-twin engine running at 3,600 rpm, with 41kVA of peak motor-starting capability.
The Kohler 20RCA is intended for homes with substantial central-air starting demand and a running-load plan within 18kW on natural gas.
Kohler 20RCA questions answered: sizing, cost, fuel and maintenance
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Kohler 20RCA Specifications (Manufacturer Data)
| Specification | Kohler 20RCA | Source |
|---|---|---|
| Rated output, natural gas | 18 kW | 1, 2 |
| Rated output, propane (LP) | 20 kW | 1, 2 |
| Engine | Kohler CH1000 V-twin, 999 cc | 1 |
| Dimensions (L × W × H) | 47 × 26.0 × 32.3 in (1193 × 660 × 820 mm) | 1 |
| Weight | 567.5 lb (257 kg) shipping weight, generator set; 611.7 lb with 200 A RXT service-entrance ATS | 1 |
| Sound level | 66 dB(A) weekly exercise; 70 dB(A) full-speed operation (at 23 ft / 7 m) | 1 |
| Natural gas use, ½ load / full load | 161 / 281 ft³/hr | 1 |
| Propane use, ½ load / full load | 82 / 136 ft³/hr | 1 |
| Line circuit breaker | 100 A | 1 |
| Transfer switch options | Optional Kohler Model RXT or RDT automatic transfer switch, with load-shed kit and power relay modules available; 20RCAL package includes a 200 A service-entrance-rated RXT | 1 |
| Warranty | Premium 5-year/2,000-hour limited standby warranty (parts, labor and travel); 7-year and 10-year limited warranties optional | 1, 2 |
| Starting MSRP (Kohler product page) | $6,016 | 2 |
Kohler's product page lists slightly different catalog figures (555 lb; 64 / 69 dB(A)). The table uses the dated April 2026 specification sheet.
What the size and fuel figures mean for installation
Kohler says the 20RCA can be placed as close as 18 inches from a home, citing NFPA guidance for clearance to combustible materials, and tells buyers to check state and local codes; the sheet also offers 3 in and 4 in concrete mounting pads and notes its dimensions are for reference, not installation planning. On propane, 82 ft³/hr at half load converts to about 2.25 gal/hr using Kohler's own factor of 36.39 ft³ per gallon, or roughly 162 gallons over a 72-hour outage (our arithmetic). See the propane tank sizing guide. (Source: 1.)
Specification sources, checked October 3, 2026:
Where the 20RCA Fits
The Kohler 20RCA is intended for homes with substantial central-air starting demand and a running-load plan within 18kW on natural gas. On natural gas, plan against 18kW rather than the propane nameplate. The 41kVA starting rating describes a short motor-start event and cannot be added to the running output.
Inventory the loads you need during an outage, including HVAC starting current, pumps and electric heat. Use the generator size calculator to organize the load list, then have an installer check the design against the exact alternator and fuel configuration.
Equipment Cost and Installation Scope
Kohler’s starting equipment MSRP for the 20RCA is $6,016, checked September 30, 2026. That is not an installed price.
A complete quote should itemize the generator, compatible transfer switch, battery, foundation, electrical and fuel work, permits, commissioning, registration and any load controls or cold-weather accessories. Long trenching runs, gas-meter upgrades and changes to service panels can materially change the total. Compare equivalent scopes from local installers; no national installed average is asserted here.
Source: Kohler 20RCA consumer catalog.
Transfer Switch and Fuel Supply
Confirm the exact package: 20RCA and 20RCAL are different purchasing choices. The L package is the transfer-switch bundle; do not assume a base-model equipment quote includes the switch. Require the transfer-switch model, amperage, service-entrance rating and load-management accessories as separate named items in the quote. A generator’s kW rating alone does not determine the correct transfer switch.
Source: Kohler 20RCA technical specification.
At full load, the technical sheet lists 281 ft³/hr of natural gas and 136 ft³/hr of LP vapor. Have the installer check fuel supply with the other connected appliances operating; a meter label or short pipe run alone does not establish sufficient capacity.
Ownership and Service
TP-7092 lists standard oil service yearly or at 150 hours, filter replacement with each oil change, and oil checks every 24 operating hours. Use the complete current manual for air-filter, ignition, battery and other service tasks. Severe conditions may require shorter intervals; match the manual to your model and serial number.
Source: Kohler 20RCA operation manual.
Compare the Kohler Line
Compare running output on your actual fuel, peak motor starting, cooling architecture and installed system cost. Local commissioning, parts access and service response are material parts of the purchase.