KOHLER KG125R-QS4 125 kW Standby Generator — Three-Phase, 277/480, 4R13X Alternator, Steel Enclosure
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- Liquid-cooled turbocharged V-8 engine
- APM402 controller with Modbus
- NFPA 110 Level 2 capable
- Steel or aluminum sound enclosure
- 100% load acceptance in one step
- Natural gas, LPG or factory dual fuel
- cUL/UL 2200 listed, CSA certified
- KOHLER 5-year/2000-hour limited warranty
Ships by LTL freight. Too large for parcel delivery. Questions on freight? Call (888) 831-0450.
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The KOHLER KG125R is an enclosed, liquid-cooled standby generator designed for residential and light commercial backup power. Its industrial engine supports extended operation during utility outages, while the controller manages generator operation and provides system information for service and monitoring.
Key features
- Liquid-cooled powertrain: 6.2 L (378 cu. In.) engine operating at 1800 rpm.
- Fuel flexibility: Designed for natural gas or LP vapor operation. Fuel conversion and setup must match the selected configuration.
- Generator control: APM402 control provides system monitoring and diagnostic functions.
- Enclosed construction: Sound-attenuating enclosure for outdoor standby installations.
- Power quality: Voltage and frequency regulation support connected electrical loads.
- Service equipment: Includes a unit-mounted radiator, coolant, flexible fuel lines, and battery charging equipment.
Specifications
| Manufacturer | KOHLER |
|---|---|
| Model | KG125R |
| Power class | 125 kW |
| Fuel | Natural gas / LP |
| Cooling | Liquid-Cooled |
| Frequency | 60 Hz |
| Controller | APM402 |
| Engine displacement | 6.2 L (378 cu. In.) |
| Engine speed | 1800 rpm |
| Electrical configuration | KG125R, Three-phase, 277/480, 4R13X Alternator, Steel Enclosure |
| Line circuit breaker | 200 A |
| Enclosure | Steel |
Manufacturer SKU: KG125R-QS4
Included equipment
Generator in the selected enclosure and configuration. Automatic transfer switch sold separately. The listed configuration includes a factory-installed block heater.
Installation and sizing
Match voltage, phase, fuel supply, and connected loads to the selected configuration. Output depends on fuel and operating conditions. Installation, fuel-system work, and transfer-switch connections require a qualified installer.
| Manufacturer | KOHLER |
|---|---|
| Model Number | KG125R-QS4 |
| Voltage | 277/480 V, three-phase, 60 Hz |
| Standby Rating | 125 kW NG / 105 kW LPG (4R13X alternator) |
| Rated Current | 188 A NG / 158 A LPG |
| Line Circuit Breaker | 200 A |
| Enclosure | Steel sound enclosure |
| Weight (wet) | 3562 lb (1616 kg) steel |
| Fuel | Natural gas or LPG (dual fuel on select QS models) |
| Engine | KOHLER KG6208THD, 6.2 L turbocharged V-8, 1800 rpm |
| Cooling | Liquid-cooled, radiator, 113 F ambient |
| Controller | APM402, Modbus, NFPA 110 Level 2 capable |
| Sound Level | 65 dB(A) at 7 m |
| Fuel Consumption 100% Load | NG 1678 cfh, LPG 664 cfh |
| Fuel Inlet | 1.5 in NPT |
| Certifications | cUL/UL 2200, CSA, EPA NSPS |
| Dimensions (L x W x H) | 138.8 x 45.4 x 65.5 in (3525 x 1154 x 1665 mm) |
| Warranty | 5-year/2000-hour basic; 5-year Premium optional |
Specifications are from the manufacturer and may change. Questions? Call (888) 831-0450.
KOHLER 5-Year / 2000-Hour Limited Warranty (5-Year Premium optional)
| Coverage | defects in materials and workmanship for 5 years or 2000 hours, whichever occurs first |
|---|---|
| Labor and travel | covered in years 1 and 2 only (basic warranty) |
| Use | stationary standby backup to a utility source; mobile or non-standby use voids the warranty |
| Registration | startup by a KOHLER distributor/dealer submitted to KOHLER's warranty startup program |
| Optional | 5-year Premium limited warranty (parts, labor, travel) available |
| How to claim | call 1-800-544-2444 |
Manufacturer warranties are provided by the manufacturer. Keep your invoice as proof of purchase. Questions about a warranty claim? Call (888) 831-0450.