The Kohler 45REZG generator is listed with standby output of 41 kW, Natural Gas fuel, and 60 Hz operation.
Kohler Generator Specifications
Generator • Natural Gas • 60 Hz
Standby power: 41 kW
Key specifications
41 kW Standby power
Natural Gas Fuel
60 Hz Frequency
Useful generator charts
Charts are shown only when this model has enough usable source data.
Power output
Low 37 kW High 41 kW
Standby
41 kW
Prime
37 kW
How the Kohler 45REZG compares
This compares the supplied numeric specification with Kohler generators in the same broad standby-power class where enough comparable data exists.
Standby power
41 kW
In line with avg
57th percentile
Oil capacity
1.51 gal
40% below avg
17th percentile
Standby power41 kW
Low 30 kWAverage 41.1 kWHigh 55 kW
Very close to the similar-output Kohler average. Around the 57th percentile for this field.
Oil capacity1.51 gal
Low 1.09 galAverage 2.52 galHigh 4.12 gal
About 40% below the similar-output Kohler average. Around the 17th percentile for this field.
This model Peer average
Generator information
| Manufacturer | Kohler |
|---|---|
| Model | 45REZG |
| Generator type | Generator |
| Fuel | Natural Gas |
| Frequency | 60 Hz |
Electrical output
| Standby power | 41 kW |
|---|---|
| Prime power | 37 kW |
| Standby kVA | 51.0 |
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 | 1.51 gal (5.7 L) |
| Emissions | EPA-Certified for Stationary Applications |
Fuel consumption
| Standby | 25%; 50%; 75%; 100% |
|---|---|
| Prime | 25%; 50%; 75%; 100%; 110% |
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.