Generac 40kW 3-Phase
The Generac 40kW 3-Phase standby generator delivers robust and dependable backup power for residential, commercial, and light industrial applications. Engineered to automatically start during outages, it powers essential systems, heavy appliances, and sensitive electronics with exceptional reliability. Featuring corrosion-resistant aluminum construction and a compact footprint, it blends durability with space efficiency.
Key Benefits of Generac 40kW 3-Phase
- Quiet-Test™ Mode – Operates at lower RPM for quieter, more efficient self-testing.
- Cellular Connectivity – Remote monitoring via Mobile Link and Fleet services.
- TruePower™ Technology – Less than 5% total harmonic distortion for safe electronics operation.
- Surge Capacity – Handles large motor starting loads with ease.
- Corrosion Resistance – Aluminum housing with stainless-steel exhaust for extended service life.
- Single-Side Maintenance – Access all service points from one side for faster upkeep.
- Controller Selectable Fuel – Switch between liquid propane and natural gas with ease.
- Flexible Voltage Output – Configurable for multiple 3-phase voltages with VCC accessory.
Common Applications
- Commercial facilities needing 3-phase backup
- Industrial sites with heavy electrical loads
- Large residential estates with multiple systems
Packaging
Includes generator unit, aluminum enclosure, installation instructions, and warranty. Battery not included.
Product Properties
| Property | Value |
|---|---|
| Fuel Type | Liquid Propane or Natural Gas |
| Running Watts | 40000 |
| Engine Size | 4.5 L |
| Engine Type | 4-cyl In-line |
| Battery Size | Group 27 |
| Battery Type | Flooded Lead Acid |
| Enclosure | Aluminum |
| Weight | 1781 lb |
| Oil Capacity | 0 qt |
| Quiet-Test | Yes |
| Main Line Circuit Breaker | 0 A |
| Max Continuous Power (NG) | 0 kW |
| Max Continuous Power (LP) | 0 kW |
For a 1-phase alternative, see the Generac 40kW 1-Phase. Learn more at Generac.com.




