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

Generator Set (Generac Guardian 11kW): Package w/200-Amp ATS

…50-State Approved Generator/Switch Package

This standby generator is best suited for: 1)small to medium-sized homes (we recommend it for applications in range of 1800 - 2400 square feet); 2)small or home-based businesses (that require single-phase power).

Generac's 11 kW generator set features steel-enclosed Guardian residential standby, and 200-amp service-entrance rated automatic transfer switch (ATS model# RTSD200A3); generator set will run a home's lights and basic circuitry in a 3000 square-foot area. In our experience, it can power an adequate combination of lights and appliances to satisfy most 1500 to 2000 square-foot applications. Generator set should operate up to a 3-ton central AC (manufacturer's claim), but it won't power your central electric heat. This is not a whole-house generator set, however it should effectively run from two to seven appliances simultaneously, depending on their starting watts. 200-amp auto transfer switch boasts digital load management technology (DLM), and standard NEMA 3R enclosure (indoor/outdoor rated). Generator housing is steel, the motor a V-twin (with air cooling) trademarked OHVI type, featuring pressurized lubrication and an electronic speed governor. Generator set will burn natural gas or liquid propane, whichever you prefer. Should you decide to alter fuel source, modification is quick and easy. This
generator set is CARB approved, available to California residents.

  • Important: See the shipping tab for information regarding our liftgate option, and residential versus commercial deliveries. At present, because T-Rex is shipping Generac products direct from the company's Wisconsin-based factory, any
  • residential delivery weighing in excess of 80 lbs will require the $75.00 liftgate shipping option. Shipments to commercial addresses (non-residences) remain exempt from these charges unless specified by customer.

    Write a review

    Model:  6438-1
    Price:  $2,997.00
    Available Options:
    Type Delivery Preferred:

    Model Specs

    Manufacturer: Generac Guardian
    Model #: 6438
    Color: White
    Enclosure: Steel
    Engine Make: Generac
    Transfer Switch Included?: Yes
    Price: $2,997.00

    Generator Set Output
    Rated Power (Natural Gas): 10000 Watts
    Rated Power (Liquid Propane): 11000 Watts
    Phase: 1
    Frequency: 60 Hz
    Voltage: 120/240
    Rated Amps: 41.67(NG)/45.83(LP)
    Rotor Poles: 2
    Mainline Circuit Breaker: 45 Amps

    Engine Type: OHVI™ V-Twin
    Intake Method: Carburetor
    Cylinder Block: Aluminum
    HP/cc: NA/530
    Number of Cylinders: 2
    Compression Ratio: 9.5:1
    Lubrication Method: Pressurized
    Valve Arrangement: Overhead
    Engine Cooling: Air
    Engine rpm: 3600
    Fan Type: NA
    Governor System: Electronic
    Ignition System: Electronic
    Starter Voltage (DC): 12
    Battery Required (Volts/Cold-Cranking Amps): 12/525 (Not 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 @ 50% Load): 102 Cubic Feet/Hour
    Fuel Consumption (NG @ Full Load): 156 Cubic Feet/Hour
    Fuel Consumption (LP @ 50% Load): 1.25 Gallons/Hour
    Fuel Consumption (LP @ Full Load): 1.93 Gallons/Hour
    Fuel Consumption (LP @ 50% Load): 4.73 Liters/Hour
    Fuel Consumption (LP @ Full Load): 7.31 Liters/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: 459 lbs
    Dimensions (Inches): 47.9L x 25.3W x 28.8H
    Decibels (@ Full Load - 7 Meters): 63
    Compliance: 50-State US

    Additional Features
    V-Twin Generac engine with trademarked OHVI technology
    Can be prepped on the ground for liquid propane or natural-gas operation
    Generator set sports standard steel enclosure and mounting pad
    All air-cooled Guardian models come with electronic speed governor
    Package comes with 200-amp automatic transfer switch (service-entrance rated)
    Simple and flawless interface between Nexus controller and 200-amp automatic transfer switch
    Enclosure has lockable lift-up roof, pull-out front for simple maintenance access

    Transfer Switch

    Manufacturer: Generac
    Model #: RTSD200A3
    Model Description: 200-Amp Nexus Smart Switch (Outdoor Model)
    Rating: Service Entrance
    Built-In Load-Shedding Capability?: No

    Voltage (AC): 120/240
    Phase: 1
    Frequency: 60 Hz
    Maximum Generator kilowatts: 60
    Rated Amps: 200
    Maximum Generator Amps: NA
    Maximum Withstand Amps: 22000
    Number of Poles: 2
    Number of Circuit Breakers: NA

    Power Management
    Startup Delay (After Power Interruption): Adjustable (10 - 30 Seconds)
    Engine Warm-Up Duration: 5 Seconds
    Engine Cool-Down Period: 60 Seconds
    Exerciser: Every 7 Days/12 minutes
    Minimum Run Time: NA
    Return to Utility (Retransfer): 15 Seconds
    Voltage Sensing (Normal Power Source): Yes
    Voltage Sensing (Standby Source): Yes
    Frequency Sensing (Standby Source): No

    UL Listing: Yes
    Weight: 39 lbs
    Dimensions (Inches): 7.09(Depth) x 13.5W x 30.0H
    Cabinet Type: NEMA 3R

    Additional Information
    Engineered for use with 1-phase Generac models up to 60 kW
    Service-entrance rated model
    Able to manage 2 air-conditioning loads with no additional hardware
    NEMA 3R cabinet can be installed either outside or inside
    Will accommodate additional DLM modules
    Guaranteed safe transfer of generator power to home or building


  • 3-year manufacturer's limited warranty

  • Shipping

    NOTE: all Generac residential shipments weighing in excess of 80 lbs require our $75.00 liftgate shipping charge (by Generac policy). Liftgate service is optional for commercial deliveries. This policy change does not apply to shipments from other manufacturers.

    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.


    Currently viewing:  Generator Set @ T-Rex Generators - Generac Generator Set, Onan Generators Altern
    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.