The Generac MMG405 compressor is listed with standby output of 358 kW, diesel fuel, 60 Hz operation, 120/208 V, 277/480 V output, Three phase, and sound level of 68 dBA @ 23 ft (7 m).
Generator • diesel • 60 Hz • Three phase
Key specifications
Visual model specs
Built only from this model’s supplied generator specifications.
358 kW
326 kW
How the Generac MMG405 compares
This compares the supplied numeric specification with Generac generators in the same broad standby-power class where enough comparable data exists.
About 40% above the similar-output Generac average. Around the 87th percentile for this field.
About 86% above the similar-output Generac average. Around the 98th percentile for this field.
About 16% below the similar-output Generac average. Around the 7th percentile for this field.
Generator information
| Manufacturer | Generac |
|---|---|
| Model | MMG405 |
| Generator type | Generator |
| Fuel | diesel |
| Frequency | 60 Hz |
Electrical output
| Standby power | 358 kW |
|---|---|
| Prime power | 326 kW |
| Standby kVA | 447.0 |
| Voltage options | 120/208 V, 277/480 V |
| Phase | Three phase |
| Circuit breaker | 1600 A |
Engine, cooling and controls
| Maximum ambient | 120 °F (49 °C) |
|---|---|
| Controller | Microprocessor-based controller |
| Emissions | Tier III |
Physical specifications
| Dry weight | 12, 741 lb (5, 779 kg) |
|---|---|
| Dimensions (L × W × H) | 175.2 × 59.8 × 96.1 in (4450 × 1520 × 2440 mm) |
| Sound level | 68 dBA @ 23 ft (7 m) |
Battery
| Battery cranking | 1000 CCA |
|---|---|
| Battery quantity | 2 |
Fuel system and runtime
| Fuel tank | 616 gal (2, 331.8 L) |
|---|---|
| Tank runtime | 29 hr |
Disclaimer: Specifications should be verified against the official owner’s manual and confirmed on the Generac USA website.