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Generac QuietSource QT04854C 50 State-48kW-1 Ph-NG/LP

…Aluminum Housing, Operates at 1800 RPM

This standby generator is best suited for: 1)commercial warehouse or non-food retailer in range of 3200 - 3500 square feet (usually a stand-alone business that doesn't sell refrigerated items; must also employ 1-phase electric power); it can also be used to back up: 2)extra-large homes (we recommend this generator for residences 9300 to 12000 square feet in size; 1-phase input required).

Single-phase 48 kW QuietSource from Generac features 1800-RPM operation, and rust-resistant maintenance-friendly aluminum housing. Standard natural gas setup; modification for propane use will not require special expertise or technician. Powered by 4.2-liter V6 motor. Internal-mount critical grade muffler. We recommend product for residential application of 9300 - 12000 square feet, however will not provide whole-house coverage in this setting. Must be used with transfer equipment - see Switch Options tab for 1-phase RTS-series auto switches. This standby generator
is CARB/SCAQMD-approved, available to residents of California and Massachusetts.

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

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    Model:  QT04854AC
    Price:  $15,589.00
    Available Options:
    Residential Shipment?:

    Model Specs

    Manufacturer: Generac QuietSource
    Model #: QT04842AC
    Color: Grey
    Enclosure: Aluminum
    Engine Make: Generac
    Transfer Switch Included?: No
    Price: $15,589.00

    Rated Power (Natural Gas): 46 kW
    Rated Power (Liquid Propane): 48 kW
    Phase: 1
    Frequency: 60 Hz
    Voltage: 120/240
    Rated Amps: 192(NG)/200(LP)
    Rotor Poles: NA
    Mainline Circuit Breaker: 200

    Engine Type: V 6-Cylinder
    Intake Method: Carburetor
    Cylinder Block: NA
    HP/L: NA/4.2
    Number of Cylinders: 6
    Compression Ratio: 9.3:1
    Lubrication Method: Pressurized
    Valve Arrangement: Overhead
    Engine Cooling: Liquid
    Engine rpm: 1800
    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
    Engine Warm-Up Duration: 5 Seconds
    Engine Cool-Down Period: 1 Minute
    Fuel Type: Natural Gas(NG)/Liquid Propane(LP)
    Fuel Consumption (NG @ Exercise): 70 Cubic Feet/Hour
    Fuel Consumption (NG @ 25% Load): 205 Cubic Feet/Hour
    Fuel Consumption (NG @ 50% Load): 370 Cubic Feet/Hour
    Fuel Consumption (NG @ 75% Load): 516 Cubic Feet/Hour
    Fuel Consumption (NG @ Full Load): 655 Cubic Feet/Hour
    Fuel Consumption (LP @ Exercise): 0.8 Gallons/Hour
    Fuel Consumption (LP @ 25% Load): 2.23 Gallons/Hour
    Fuel Consumption (LP @ 50% Load): 4.03 Gallons/Hour
    Fuel Consumption (LP @ 75% Load): 5.6 Gallons/Hour
    Fuel Consumption (LP @ Full Load): 7.2 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: 1455 lbs
    Dimensions (Inches): 76.75L x 32.38W x 45.13H
    Decibels (@ Exercise - 7 Meters): 60
    Decibels (@ Full Load - 7 Meters): 65
    Compliance: 50-State US

    Additional Features
    Oil-pressure shutdown protects internal engine parts if oil levels deficient
    CARB-approved for 50-state operation
    Setup and operational support from knowledgeable Generac technicians
    Low-emissions engine with residential-grade muffler
    Factory prepped to run on natural gas; can be easily converted in field to burn liquid propane
    60-Hz operation at quiet 1800 rpm
    Prototype tested for motor-starting ability


  • 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.


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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.