Kohler 45REOZT4 Generator Set
The Kohler 45REOZT4 is a 40 kW (50 kVA) Diesel standby generator set powered by a Kohler 2.5 L engine. It is available at 120/208 V, 120/240 V, 277/480 V and 347/600 V, 3-phase and 60 Hz. It holds about 11.2 L (3.0 gal) of oil and 17.2 L (4.5 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 925 CCA at 12 V. The set measures 2184×1016×1622 mm (86.0×40.0×63.9 in), weighs about 1442 kg (3179 lb) and produces 68 dBA at 7 m. An integrated tank holds 293 L (77.4 gal), roughly 24 hours of runtime.
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Specifications
| Fuel | Diesel |
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| Frequency | 60.0 Hz |
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| Standby power | 40 kW |
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| Standby kVA | 50 |
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| Prime power | 36 kW |
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| Emissions | Tier 4 Final |
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Full specifications
| Voltage options | 120/208 V, 120/240 V, 277/480 V, 347/600 V |
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| Phase | 3 |
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| Power factor | 0.8 |
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| Circuit breaker | 150 A |
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| Battery cranking | 925 CCA |
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| Battery voltage | 12 V |
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| Coolant capacity | 17.2 L |
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| Max ambient | 50 °C |
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| Dimensions (L×W×H) | 2184×1016×1622 mm |
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| Dry weight | 1442 kg |
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| Sound level | 68.0 dBA @ 7 m |
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| Fuel tank | 293.0 L |
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| Tank runtime | 24 hr |
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Filters & service parts (model family)
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
| Item | Spec | Capacity | Part # | Interval |
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| Air filter | | | 8080700140 buy | |
| Fuel filter | | | 8061700110 buy | |
| Fuel filter | | | ED0021753180-S buy | |
| Fuel filter | | | ED0021753200-S buy | |
| Fuel filter | | | ED0037501270-S buy | |
| Oil filter | | | 8042700010 buy | |
| Oil filter | | | ED0021752800-S buy | |
| Oil filter | | | ED0021753090-S buy | |
Available documents
BrochureSpec sheetInstallation manualReferenceOwner's manualParts manualWiring diagram