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Buy Generator (Generac Guardian): 45 kW NG/LP Steel 3-Phase

…Easily Changed from Propane to Natural Gas Fuel Source

This standby generator is best suited for: 1)small commercial warehouse or non-food retailer 2700 to 3000 square feet (that employs three-phase power); it can also be used to back up: 2)extra-large homes (Our recommendation 9300 to 12000 square feet; must use 3-phase electricity).

This buy generator machine is 3-phase Guardian (45 kW output); can be ordered in voltage configurations 120/208, 120/240, or 277/480. Buy generator unit is sent to you prepped to employ natural gas as its fuel, but switching fuel types (to liquid propane) is a quick and efficient process. The steel housing is carefully engineered to afford trouble-free access to all engine components, ideal for this revamping of fuel sources, and for performing routine maintenance checks. Forty-five kilowatt buy generator model has a 2.4-liter 4-cylinder engine with electronic governor and closed-system liquid cooling. All standby buy generator machines require transfer equipment for safe operation - for best results, we recommend selecting from among Generac's 3-phase RTS switches (see Switch Options tab), guaranteed to be compatible with the Guardian Nexus Controls. This buy generator model not intended for sale to California residents

  • Important: Please see the shipping tab for information regarding the liftgate shipping option and residential versus commercial deliveries.

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    Model:  QT04524-3
    Price:  $12,349.00
    Available Options:
    3-Phase Voltage:

    Model Specs

    Manufacturer: Generac
    Model #: QT04524GJKX
    Color: White
    Enclosure: Steel
    Engine Make: Generac
    Transfer Switch Included?: No
    Price (All Voltages): $12,349.00

    Rated Power (Natural Gas): 45 kW
    Rated Power (Liquid Propane): 45 kW
    Phase: 3
    Frequency: 60 Hz
    Voltage: 120/208
    Voltage: 120/240
    Voltage: 277/480
    Rated Amps: 156(NG/LP)
    Rated Amps (240-Volt): 135(NG/LP)
    Rated Amps (480-Volt): 68(NG/LP)
    Rotor Poles: NA
    Mainline Circuit Breaker: 175 Amps(NG/LP)
    Mainline Circuit Breaker (240-Volt): 150 Amps(NG/LP)
    Mainline Circuit Breaker (480-Volt): 80 Amps(NG/LP)

    Engine Type: Inline 4-Cylinder
    Intake Method: Carburetor
    Cylinder Block: NA
    HP/L: NA/2.4
    Number of Cylinders: 4
    Compression Ratio: 8.5:1
    Lubrication Method: Pressurized
    Valve Arrangement: Overhead
    Engine Cooling: Liquid
    Engine rpm: 3600
    Fan Type: Belt Driven
    Governor System: Electronic
    Ignition System: Electronic
    Starter Voltage (DC): 12
    Battery Required (Volts/Cold-Cranking Amps): 12/525 (Included)
    Startup Delay (After Power Interruption): Programmable (10-30 Seconds)
    Engine Warm-Up Duration: 5 Seconds
    Engine Cool-Down Period: 1 Minute
    Fuel Type: Natural Gas(NG)/Liquid Propane(LP)
    Fuel Consumption (NG @ Exercise): 65 Cubic Feet/Hour
    Fuel Consumption (NG @ 25% Load): 210 Cubic Feet/Hour
    Fuel Consumption (NG @ 50% Load): 380 Cubic Feet/Hour
    Fuel Consumption (NG @ 75% Load): 545 Cubic Feet/Hour
    Fuel Consumption (NG @ Full Load): 730 Cubic Feet/Hour
    Fuel Consumption (LP @ Exercise): 0.7 Gallons/Hour
    Fuel Consumption (LP @ 25% Load): 2.3 Gallons/Hour
    Fuel Consumption (LP @ 50% Load): 4.2 Gallons/Hour
    Fuel Consumption (LP @ 75% Load): 5.9 Gallons/Hour
    Fuel Consumption (LP @ Full Load): 8.0 Gallons/Hour

    Convenience Features
    Automatic Voltage Regulation: Yes
    Low-Voltage Shutdown: Yes
    High-Voltage Shutdown: Yes
    Low-Oil Shutdown: Yes
    Overspeed Shutdown: Yes
    High-Temperature Shutdown: Yes
    Starter-Overcrank Protection: Yes
    Low-Battery Protection: Yes
    Built-In Battery Charging Capability: Yes
    UL Listed: Yes
    External-Fault Capability: Yes
    Internal-Fault Protection: Yes
    Incorrect-Wiring Protection: Yes
    Mainline Circuit-Breaker Protection: Yes
    Safety Fusing: Yes

    Weight: 1414 lbs
    Dimensions (Inches): 76.77L x 33.5W x 45.13H
    Decibels (@ Exercise - 7 Meters): 61
    Decibels (@ Full Load - 7 Meters): 73
    Compliance: 49-State US

    Additional Features
    All QT-series models UL recognized
    Requires simple field transformation to operate on liquid propane (LP)
    Tasteful but understated housing creates esthetically-pleasing installation
    Galvannealed-steel housings coated with trademarked Rhinocoat finish for enhanced durability
    Electronic Isochronous governor keeps engine speed stable to +/-.25% of norm
    Electrostatically-applied textured epoxy finish guaranteed to last
    Optional wireless remote monitoring capabilities


  • 2-year manufacturer's limited warranty

  • Shipping

    The T-REX Free Shipping Pledge:
    The manufacturers we work with are large concerns that ship multiple items each day. This enables them to attain the best shipping rates available. T-REX passes these savings on to our customers by providing free shipping to any commercial or residential address in the continental United States. This is the T-REX pledge. We will adhere to it even when a freight carrier adds one-time or unanticipated shipping fees. Try obtaining these terms from another Internet-based generator seller. You will not find a more customer-friendly policy than ours.

    About Lift Gates:
    Typical delivery trucks are designed to be unloaded at docks, or by forklifts. In other words, they are designed to deliver to commercial locations where such options are available. By contrast, a lift gate-equipped truck lowers heavy items from the truck trailer (which can be several feet high) to the ground, using a hydraulic mechanism similar to an elevator. If your delivery will go to an address not equipped with a loading dock, and you don't have access to a forklift, then selecting the lift-gate delivery option is a convenient alternative.

    A generator from T-REX can weigh hundreds of pounds. Without access to a loading dock or forklift, unloading one safely may require several able-bodied individuals. Delivery drivers are NOT required by their companies to help customers unload. Unless you are certain that a sufficient number of helpers will be available during the delivery, we urge you to specify the lift-gate shipping option before checking out. Charge for the lift-gate is $75.00, and is NOT included in the Free-Shipping Pledge offered by T-REX. We feel, however, that it is worth the investment.

    Residential Delivery:
    You need to inform us if your delivery will be going to a residential address. Freight companies need to know this because many residential areas can't be serviced by large semi trucks. The generator will instead be loaded onto a smaller truck tailored to home deliveries. A home which serves as a place of business (regardless of the presence of company name/signage), if located in a residential area, is still considered a residential address for shipping purposes. Please select the residential delivery option if applicable. T-REX agrees to pay all additional residential delivery costs, but to do so, we must be properly informed before shipping arrangements are made.

    To select your choice of residential or commercial delivery, please see the purchase options in the Add To Cart area.

    Switch Options

    Generac RTS-Series Medium-Watt Auto Transfer Switch - Three Phase:
    100-Amp Model (Available 208/240/480 Voltages) - Outdoor
    200-Amp Model (Available 208/240/480 Voltages) - Outdoor
    400-Amp Model (Available 208/240/480 Voltages) - Outdoor

    Generac RTS-Series High-Watt Auto Transfer Switch - Three Phase:
    600-Amp Model (Available 208/240/480 Voltages) - Outdoor
    800-Amp Model (Available 208/240/480 Voltages) - Outdoor


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    T-Rex Generators distributes products from many different standby and portable generator manufacturers at substantially discounted prices. These represented companies include: Asco automatic transfer switches, Briggs & Stratton generators, Winco generators, Generac Generators, GenTran transfer switches, Reliance Controls Transfer Switches, and Zenith automatic transfer switches. T-Rex also carries Honda powered generators which have the same time-tested Honda engines as the substantially more expensive Honda generator brand units.