Generac XG04045 Protector Series 40kW 1-phase Generator Features:
Generac XG04045 40kW 1-Phase Generator
The Generac XG04045 is a rugged, high-performance 40kW single-phase standby generator from the Protector® Series, designed to handle the rigorous demands of larger residential properties and light commercial operations. Built with premium engineering and high-output capability, this model offers advanced digital controls, ultra-clean power output, and dependable fuel flexibility—all in a corrosion-resistant aluminum enclosure that’s engineered to endure.
At the heart of the XG04045 is a Generac 4.5-liter inline 4-cylinder engine, a naturally aspirated, liquid-cooled workhorse built to operate at a lower 1800 RPM, which improves fuel efficiency, reduces mechanical stress, and contributes to longer service life. This model is equipped with the Power Zone® 410 digital controller, which delivers full system visibility including output performance, engine data, maintenance alerts, and detailed diagnostic logs—all through an intuitive graphical interface.
This generator outputs 120/240V single-phase power with ±1% digital voltage regulation and <5% total harmonic distortion, ensuring it is safe to use with sensitive electronics like smart appliances, communication systems, and microprocessor-controlled HVAC units. It also features Mobile Link™ connectivity, enabling remote monitoring and control from anywhere via smartphone or computer.
Quiet operation is another standout feature, with sound levels rated at just 67 dB(A) at 23 feet under load and 60 dB(A) during exercise mode, thanks to its integrated muffler system and sound-attenuated aluminum housing. The enclosure is also wind-rated to 145 mph, UL 2200 listed, and finished with Generac’s RhinoCoat™ powder coating for superior corrosion protection.
Fuel flexibility is built in: the XG04045 runs on either natural gas or liquid propane, with consumption rates of 5.7 gallons/hour of LP or 494 cubic feet/hour of NG at full load. The fuel type is selectable through the controller, removing the need for manual adjustments.
With a long list of compatible field-upgradable options—including cold weather kits, load management tools, and advanced annunciation panels—this model is ready for a wide range of installation environments and operational needs.
Key Features:
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40kW Single-Phase Standby Power – Ideal for large residences and small business operations
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4.5L Generac Liquid-Cooled Engine – Operates at 1800 RPM for improved longevity and reduced wear
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Power Zone® 410 Controller – Multilingual digital interface with full system diagnostics and alarms
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±1% Voltage Regulation / <5% THD – Delivers utility-quality power safe for sensitive electronics
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Mobile Link™ Monitoring – Monitor performance and receive alerts remotely from any device
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Quiet Operation – Runs at 67 dB(A) under load and 60 dB(A) in exercise mode
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Corrosion-Resistant Aluminum Enclosure – Powder-coated for long-lasting protection in any climate
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Dual-Fuel Capability – Efficient operation on either LP or NG, controller-selectable
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Sealed Ball Bearings & Direct Excitation – For enhanced performance and lower maintenance
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UL 2200 Listed & 145 mph Wind Rating – Built to withstand harsh conditions and strict code requirements
The Generac XG04045 provides an unbeatable combination of power, precision, and protection, making it the go-to choice for property owners who demand reliability and performance in their backup power system. From luxury estates to critical business continuity, this generator is ready to deliver.
