My Account | Cart Contents | Checkout | Contact Us  
Trex Generators Trex Generators, Factory Direct Savings, No Sales Tax, Free Freight, Hassle-Free Transaction
Quick Picks

T-Rex Recommended Generators

Advanced Search
Briggs & Stratton
Reliance Controls
My Account
Shipping & Warranty
Privacy Notice
Conditions of Use
Contact Us
About Us
Press Releases

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

…Choice of 3-Phase Voltages: 208, 240, or 480

This standby generator is best suited for: 1)commercial warehouse or non-food retailer with dimensions 3200 - 3500 square feet (probably a stand-alone business that doesn't deal in refrigerated merchandise; and which uses 3-phase power); it can also be used to back up: 2)extra-large homes (we recommend this generator for residential applications 9300 to 12000 square feet in size; 3-phase input required).

Three-phase 48 kW QuietSource from Generac offered in voltages: 120/208, 120/240, 277/480. Boasts urban-friendly 1800 RPM operation, and Generac's no-rust aluminum shell. Easy conversion from standard natural-gas setup to liquid propane operation. Motor is liquid-cooled 4.2-liter V6. Trademarked Nexus controller compatible with Generac's three-phase RTS-series switches - see Switch Options tab. This three phase standby product
CARB/SCAQMD-approved, available to California and Massachusetts residents.

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

  • Write a review

    Model:  QT04854GJKC
    Price:  $15,589.00
    Available Options:
    3-Phase Voltage:

    Model Specs

    Manufacturer: Generac QuietSource
    Model #: QT04842GJKC
    Color: Grey
    Enclosure: Aluminum
    Engine Make: Generac
    Transfer Switch Included?: No
    Price (All Voltages): $15,589.00

    Three Phase Generators Output
    Rated Power (Natural Gas): 46 kW
    Rated Power (Liquid Propane): 48 kW
    Phase: 3
    Frequency: 60 Hz
    Voltage: 120/208
    Voltage: 120/240
    Voltage: 277/480
    Rated Amps (208-Volt): 160(NG)/166(LP)
    Rated Amps (240-Volt): 138(NG)/144(LP)
    Rated Amps (480-Volt): 69(NG)/72(LP)
    Rotor Poles: NA
    Mainline Circuit Breaker (208-Volt): 175
    Mainline Circuit Breaker (240-Volt): 150 Amps
    Mainline Circuit Breaker (480-Volt): 80 Amps

    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

    Three Phase Generators Measurables
    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

    Three Phase Generators Additional Features
    Certified for California CARB operation
    Can be operated on propane or natural gas
    For potential transfer-switch matches, see "Switch Options" tab
    Liquid-cooled powerplant employs generator-specific technology
    Factory built to run on NG; can be easily modified to burn LP
    2-line LCD display easy to follow, understand
    Standard incorrect-wiring protection


  • 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


    Currently viewing:  Generac QuietSource QT04854C 50 State-48kW-Three Ph-NG/LP
    Other Links:
    3-Phase Generators
    20kW Generator
    Backup Generators
    Caterpillar Generators
    Commercial Generators
    Diesel Generators
    Diesel Generators Used
    Gas Generators
    Generator for House
    Generator PTO
    Generator Standby
    Generators Home Use
    Industrial Generator
    Natural Gas Generators
    Power Generators Diesel

    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.