Generac XG04045CNAX 40kW 3-Phase Standby Generator

Generac XG04045CNAX – 40kW Configurable 3-Phase Standby Generator

The Generac XG04045CNAX is a 40kW liquid-cooled automatic standby generator designed for properly planned 3-phase backup power applications. This Protector gaseous generator supports natural gas or vapor propane fuel and is part of the Generac Liquid Cooled XG Series. The supplied product data lists this model as a no-catalyst configuration and notes that it is not available for purchase in California or Massachusetts. For 120/208V 3-phase applications, the unit includes the appropriate Voltage Configuration Cartridge based on the supplied product note. For 120/240V 3-phase or 277/480V 3-phase applications, the appropriate Voltage Configuration Cartridge and circuit breaker must be ordered for the system to function correctly.

40kW Standby Power for 3-Phase Applications

The XG04045CNAX is intended for standby generator projects where 40kW output, 3-phase service, and voltage configuration planning are required. Final load sizing, voltage requirements, fuel setup, catalyst requirements, transfer equipment, permitting, and site conditions should be reviewed by a qualified installer before purchase or installation.

No-Catalyst Configuration for Eligible Locations

This CNAX configuration does not include a catalyst and is not available for purchase in California or Massachusetts based on the supplied product note. For CA or MA installations, select a compliant catalyst-equipped model that matches the required voltage and phase configuration.

Voltage Configuration and RTS Switch Planning

For applications using an RTS switch, the supplied product note states that the appropriate Phase Sense Kit is required for the selected 3-phase voltage. For 120/240V or 277/480V 3-phase applications, the appropriate Voltage Configuration Cartridge and circuit breaker must also be selected for the system to function correctly.

Natural Gas and Vapor Propane Fuel Support

This Generac XG Series generator supports natural gas or vapor propane fuel. Fuel type, voltage, phase, RPM, catalyst configuration, transfer equipment, and site requirements should be reviewed carefully before placing an order.

The Generac XG04045CNAX is designed for permanent standby generator applications where 40kW output and configurable 3-phase service are part of the project requirements. Its no-catalyst configuration should be reviewed against state, local, and project-specific emissions requirements before purchase.

For projects using 120/240V or 277/480V 3-phase service, the correct Voltage Configuration Cartridge and circuit breaker must be selected. If the generator will be used with an RTS switch, the appropriate Phase Sense Kit should also be planned for the selected 3-phase voltage.

Generac XG04045CNAX Features & Benefits

• 40kW standby output: Provides a clear power rating for properly sized 3-phase backup applications.
• Configurable 3-phase voltage: Supports voltage configuration planning for compatible 3-phase applications using the appropriate VCC and circuit breaker where required.
• 120/208V configuration support: The supplied note states that 120/208V 3-phase applications include the appropriate Voltage Configuration Cartridge.
• Natural gas or vapor propane fuel: Supports two common gaseous fuel options for permanent standby generator planning.
• 4.5L engine: Uses a 4.5L liquid-cooled engine platform for supported standby generator applications.
• RTS switch planning: Applications using an RTS switch require the appropriate Phase Sense Kit for the selected 3-phase voltage.
• No-catalyst configuration: Identifies this CNAX model as a no-catalyst option that is not available for California or Massachusetts purchase per the supplied product note.

Generac XG04045CNAX Specifications

Generac XG04045CNAX Info

Generac XG04045 User Manual

Generac XG04045 Installation Manual