Generac 40kW 1-Phase
The Generac 40kW 1-Phase standby generator offers reliable backup power for homes, businesses, and light industrial sites. Designed for seamless automatic startup during power outages, it can handle large appliances and sensitive electronics with ease. Its corrosion-resistant aluminum enclosure and compact footprint make it a durable and discreet choice for varied environments.
Key Benefits of Generac 40kW 1-Phase
- Quiet-Test™ Mode – Runs at reduced RPM for quieter, more fuel-efficient self-testing.
- Cellular Connectivity – Remote monitoring enabled through Mobile Link and Fleet services.
- TruePower™ Technology – Less than 5% total harmonic distortion for safe operation of electronics.
- Surge Capacity – Handles high-demand startup loads reliably.
- Corrosion Resistance – Aluminum housing with stainless-steel exhaust ensures long life.
- Single-Side Maintenance – Easy access to all service points from one side.
- Controller Selectable Fuel – Switch between liquid propane and natural gas easily.
- Advanced Engine Design – Dual-valve, ultra-low pressure fuel system and intelligent controls for efficiency.
Common Applications
- Residential properties requiring 1-phase backup
- Small businesses needing uninterrupted operations
- Rural properties with high electrical demands
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 three-phase alternative, see the Generac 40kW 3-Phase. Learn more at Generac.com.




