Overview#
The Kohler 38RCL (and its current 38RCLB / 38RCLC variants) is a 38-kilowatt residential/light-commercial liquid-cooled standby generator. Like the 30RCL, it uses the turbocharged 2.2L Kohler KG2204T 4-cylinder engine running at 1800 RPM, with a larger alternator delivering the higher rated output.
This is a common choice for Silicon Valley estates with main house plus guest house on one panel, triple-zone HVAC, pool heating, EV charging, and home workshop loads that push past what a 30 kW unit can serve.
Sizing guidance#
The 38RCL is rated 38 kW on both natural gas and LP, single-phase 120/240 V (also offered in 3-phase 208/240/480 V variants). Typical residential applications:
- Larger estates with three-zone HVAC
- Pool + spa with gas or heat pump heating
- Guest house on the same electrical service
- Workshop with welding/compressor loads
- Multiple Level 2 EV chargers
Step up to 48RCL if your load study indicates 400A service, four+ HVAC zones, or commercial-grade kitchen equipment.
Our service experience#
The 38RCL is a popular unit for Atherton, Hillsborough, and Los Altos Hills estates. At this capacity, gas supply sizing becomes critical — we always verify gas line sizing and meter capacity as part of the install survey. Many older Bay Area homes have 1" gas lines that cannot support a 38 kW genset at full load without a meter/regulator upgrade.
