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(Generac Commercial) 80 kW LP Natural Gas Standby 3-Phase

…NG-Prepped Motor & Aluminum Enclosure

This standby generator is best suited for: 1)restaurant/food seller of 2500 - 3000 square feet (can be any concern that relies heavily on refrigeration for business; must use 3-phase electricity); 2)medium-sized commercial warehouse/non-food seller of 7500 - 8000 square feet (concern that doesn't rely on refrigeration as part of business); model can also be used as backup for: 3)a residential compound with several buildings (besides primary residence, can be a warehouse or garage, a workshop, a guest house, etc. - compound must rely on 3-phase power); 4)extra-large homes of square footage 15000 to 20000 that are 3-phase configured.

The 3-phase 80 kW Commercial-series LP natural gas generators from Generac are available in the following voltage types: 208; 240; 480. Motors are factory-outfitted to utilize either LP or NG fuel (model featured here outfitted to operate on natural gas (NG); 3-phase LP models also available). All 80 kW LP natural gas generators harbor Generac's anti-rust aluminum exterior with soft-grey finish; exterior designed for durability in coastal and high-humidity regions, is both rodent and isolation resistant. Power for these LP natural gas standby generators comes from Generac-manufactured 4.6L V-8, and a rotating-field brushless alternator (digitally regulated to +/-1.0%). 80-kilowatt Commercial-series LP natural gas generator units utilize programmable Nexus model controller. For ease of implementation, we suggest pairing Nexus controls with a Generac RTSN-family 3-phase automatic transfer switch (see Switch Options tab for available RTSN models). Companies that require generator LP natural gas backup should have needs evaluated by electrician before purchase. Generac 80 kW LP natural gas generators are approved for 48-state use; not for sale to residents of California or Massachusetts

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

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    Model:  QT08046-3NG
    Price:  $17,639.00
    Available Options:
    3-Phase Voltage:

    Model Specs

    Manufacturer: Generac
    Model #: QT08046XNAN
    Color: Grey
    Enclosure: Aluminum
    Engine Make: Generac
    Transfer Switch Included?: No
    Price (All Voltages): $17,639.00

    Rated Power: 78 kW
    Phase: 3
    Frequency: 60 Hz
    Voltage: 120/208
    Voltage: 120/240
    Voltage: 277/480
    Rated Amps (208-Volt): 278
    Rated Amps (240-Volt): 249
    Rated Amps (480-Volt): 120
    Rotor Poles: NA
    Mainline Circuit Breaker (208-Volt): 300 Amps
    Mainline Circuit Breaker (240-Volt): 300 Amps
    Mainline Circuit Breaker (480-Volt): 150 Amps

    Engine Type: V 8-Cylinder
    Intake Method: Carburetor
    Cylinder Block: NA
    HP/L: 126/4.6
    Number of Cylinders: 8
    Compression Ratio: 9.4:1
    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
    Startup Delay (After Power Interruption): Programmable
    Engine Warm-Up Duration: 5 Seconds
    Engine Cool-Down Period: 1 Minute
    Fuel Type: Natural Gas(NG)
    Fuel Consumption (@ Exercise): 131 Cubic Feet/Hour
    Fuel Consumption (@ 25% Load): 312 Cubic Feet/Hour
    Fuel Consumption (@ 50% Load): 600 Cubic Feet/Hour
    Fuel Consumption (@ 75% Load): 835 Cubic Feet/Hour
    Fuel Consumption (@ Full Load): 1154 Cubic Feet/Hour

    Convenience Features
    Automatic Voltage Regulation: Yes
    Low-Voltage Protection: Yes
    High-Voltage Protection: 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: 1836 lbs
    Dimensions (Inches): 115.2L x 36.8W x 78.9H
    Decibels (@ Exercise - 7 Meters): 64
    Decibels (@ Full Load - 7 Meters): 74
    Compliance: 48-State US

    Additional Features
    Maintenance friendly designs
    Low-noise drive coupling provides smooth power transfer
    Equipped with rodent-shielded enclosure
    Corrosion-resistant aluminum housing
    Closed coolant-recovery method
    Ultra-modern digital control system
    All Generac power products employ company's own motors and transfer equipment


  • 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.