The Kohler 40REZG generator is listed with standby output of 39 kW, Gas fuel, 60 Hz operation, 7 available voltage configurations, and Three phase.
Kohler Generator Specifications
Generator • Gas • 60 Hz • Three phase
Standby power: 39 kWVoltage options: 7 configurations
Key specifications
39 kW Standby power
Gas Fuel
7 configurations Voltage options
Three phase Phase
60 Hz Frequency
How the Kohler 40REZG compares
This compares the supplied numeric specification with Kohler generators in the same broad standby-power class where enough comparable data exists.
Standby power
39 kW
5% below avg
41st percentile
Oil capacity
1.14 gal
55% below avg
9th percentile
Standby power39 kW
Low 30 kWAverage 41.1 kWHigh 55 kW
About 5% below the similar-output Kohler average. Around the 41st percentile for this field.
Oil capacity1.14 gal
Low 1.09 galAverage 2.52 galHigh 4.12 gal
About 55% below the similar-output Kohler average. Around the 9th percentile for this field.
This model Peer average
Generator information
| Manufacturer | Kohler |
|---|---|
| Model | 40REZG |
| Generator type | Generator |
| Fuel | Gas |
| Frequency | 60 Hz |
Electrical output
| Standby power | 39 kW |
|---|---|
| Standby kVA | 49.0 |
| Voltage options | 208 V, 600 V, 127/220 V, 120/240 V, 220/380 V, 277/480 V, 347/600 V |
| Phase | Three phase |
| Power factor | 0.8 |
Engine, cooling and controls
| Engine model | General Motors Industrial Powertrain Vortec 4.3 L |
|---|---|
| Engine displacement | 262 cu in (4.3 L) |
| Aspiration / cooling | Natural Aspiration |
| Rated engine speed | 1800 rpm |
| Engine oil capacity | 1.51 gal (5.7 L) |
| Engine coolant capacity | 5.2 gal (19.7 L) |
| Oil capacity | 1.14 gal (4.3 L) |
| Coolant capacity | 1.8 gal (6.8 L) |
| Maximum ambient | 122 °F (50 °C) |
| Controller | Decision-Maker 3000, Decision-Maker 550 |
| Alternator | Kohler 4P5 |
| Emissions | Tier 1 |
Physical specifications
| Dimensions (L × W × H) | 86.6 × 40.9 × 46.1 in (2200 × 1040 × 1172 mm) |
|---|
Battery
| Battery cranking | 630 CCA |
|---|---|
| Battery voltage | 12 V |
| Battery quantity | 1 |
Fuel consumption
| Standby | 7.7 L/h @ 25%; 10.2 L/h @ 50%; 13.8 L/h @ 75%; 16.5 L/h @ 100% |
|---|
Maintenance and service parts
| Engine oil | Interval: 150 hr; Specification: GM Specification GM6094M; Capacity: 5.7 |
|---|---|
| Fuel filter | Specification: As recommended by OEM |
| Air filter | Specification: Check for dirt or restriction |
| Coolant | Specification: 50/50 antifreeze and water mixture, DexCool Long Life type, min 300F boiling point, -34F freezing point; Capacity: 6.8 |
| Belt | Part number: GM16132; Specification: Belt, fan standard |
Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Kohler North America generator website.