Generac XG04045ANAC 40kW 120/240V Standby Generator
Ships out in 2-3 Business Days
Have questions? 1-888-321-6765 / info@truesteadsupply.com
Ships out in 2-3 Business Days
Have questions? 1-888-321-6765 / info@truesteadsupply.com
The Generac XG04045ANAC is a 40kW liquid-cooled automatic standby generator designed for backup power applications using 120/240V 1-phase service. This Protector gaseous generator supports natural gas or vapor propane fuel and allows fuel type selection through the controller. The supplied product data lists this model as catalyst equipped with SCAQMD-compliant configuration. With Quiet-Test Self-Test Mode, TruePower technology, cellular connectivity, and corrosion-resistant construction, this generator supports reliable standby power planning when properly sized and professionally installed.
The XG04045ANAC is built for standby generator projects where 40kW output, 120/240V 1-phase service, and fuel flexibility are key requirements. Final load sizing, voltage requirements, fuel setup, and site conditions should be reviewed by a qualified installer before purchase or installation.
Quiet-Test Self-Test Mode runs at a lower RPM for a five-minute test cycle and can be programmed weekly, biweekly, or monthly. TruePower technology is listed to deliver less than 5% total harmonic distortion for clean, smooth power quality.
This Generac XG Series generator supports controller-selectable fuel setup for natural gas or vapor propane. Fuel type selection using the controller helps simplify generator installation planning for qualified installers.
The supplied product details list an aluminum enclosure, zinc-plated fasteners, and electro-galvanized frame rails with powder coat for corrosion resistance. These construction details help support long-term outdoor placement in demanding environments.

The Generac XG04045ANAC is designed for permanent standby generator applications where 40kW output, 120/240V 1-phase service, and catalyst-equipped configuration are part of the project requirements. Its controller-selectable fuel setup helps support natural gas or vapor propane planning for the site.
With Quiet-Test Self-Test Mode, TruePower technology, cellular connectivity, and corrosion-resistant construction, this generator supports practical standby power planning and long-term service visibility. Its SCAQMD-compliant catalyst configuration should be reviewed alongside local installation requirements before ordering.

Need help confirming the right generator configuration?
Contact TrueStead Supply for generator sizing guidance, fuel setup support, and quote assistance.
✔ Backup power guidance ✔ Fuel setup support ✔ Quote assistance
Contact Us for a Quote| Brand | Generac |
| Series | Liquid Cooled XG Series |
| Model / SKU | XG04045ANAC |
| Product Type | Liquid-cooled automatic standby generator |
| Generator Type | Protector gaseous generator |
| Rated Power Output | 40kW |
| Fuel Type | Natural gas / vapor propane |
| Voltage | 120/240V |
| Phase | 1-phase |
| Engine | 4.5L engine |
| Monitoring | Cellular connectivity for Mobile Link and Fleet |
| Power Quality | TruePower technology; less than 5% total harmonic distortion |
| Exercise Mode | Quiet-Test self-test mode |
| Enclosure | Aluminum enclosure with corrosion-resistant frame components |
| Catalyst Configuration | Catalyst equipped; SCAQMD compliant |