Generac 6439 Liquid Propane / Natural Gas 11kW, 120/240V Home Standby Generator from the Guardian Series

- Item #: BCI2221257

Offer Ends

Liquid Propane / Natural Gas
Free Shipping!
5 In Stock
Ships in 1 to 2 business days, by December 22nd


Please select a finish

Earn 2,399 points with the purchase of this product Learn More

and earn 350pts

Multiple Rebates Available

These mail-in rebates are available for this product!

Questions about Generac 6439?

Contact us for advice or more details. Our product specialists are here to help.

Configure your Generac 6439 11kW, 120/240V Home Standby Generator from the Guardian Series

  • Battery Option

    • Please Select One
    • View Product Detail
  • Extended Protection Plan more info ►

    Select whether or not you would like to purchase an extended protection plan.
    • Please Select One
    • View Product Detail


Please select a finish

  • Generac Standby Generator Saves the Day
    Learn about Generac Standby Generators and how they saved the day in a small mid west town.
  • Generac Standy Generator Commercial
    Watch the Generac Standby Generator Commercial.

11kW 120/240V Home Standby Generator from the Guardian Series

Product Features:

  • 11kW (LP) / 10kW (NG) of power ensures your home will retain power through unexpected outages
  • 46 Amps @ 240 Volts (Single Phase)
  • Connects to existing liquid propane or natural gas fuel supply for easy and efficient power
  • Covered under 5 Year Commercial / Residential Warranty
  • Galvanneal steel enclosure with Rhinocoat finish provides superior weather protection, withstanding up to 150 mph winds
  • Multi-lingual Evolution Digital Controller allows for easy monitoring and management of generator functions
  • UL Listed to UL2200 Engine / Generator Standard for Safety
  • Programmable Seven Day Exerciser starts the generator once per week for 12 minutes to prevent oil seal drying and damage between power outages


  • Generac OHVI Engine: This V-twin, overhead valve industrial engine features plateau honed cylinder walls and plasma moly rings which help reduce operating temperature
  • Engine Displacement: 530cc
  • Engine RPM: 3600 (Revolutions per Minute)
  • Air Cooled
  • Covered Under 5 Year Commercial Warranty
  • Covered Under 5 Year Residential Warranty
  • Includes Low Oil / High Temperature Alert and Automatic Shutdown

Product Technologies / Benefits:

  • Solid-State, Frequency Compensated Voltage Regulation: This state-of-the-art power maximizing regulation system provides optimized fast response to changing load conditions and maximum motor starting capability by electronically torque-matching the surge loads to the engine
  • True Power Technology: Delivers less than 5% total harmonic distortion for clean, smooth operation of sensitive electronics and appliances

Product Specifications:

  • Overall Height: 29”
  • Overall Length: 48”
  • Overall Width: 25”
  • Noise Rating at Normal Operating Load: 63 dbA
  • NG Power Capacity: 10kW
  • LP Power Capacity: 11kW
  • NG Consumption (50% Load): 124 cubic feet per hour
  • LP Consumption (50% Load): 1.18 gallons per hour

Additional Generac Links

Our SKU: Generac 6439

This product is listed under the following manufacturer number(s):

  • Generac 6439
    Liquid Propane / Natural Gas

*Denotes a finish or option that has been discontinued

Generac 6439 Product Specifications

Owner's Manual
Specification Sheet
Installation Guide
AC Ton Rating 2-Tons
Alternator Type Brush
Amperage 46
Auto Shut Off Yes
Auto Voltage Regulation Yes
Battery Included No
Battery Type 525 CCA
CARB approved Yes
CC 530
Cast Iron Sleeve Yes
Control Type Digital
Cooling System Air Cooled
Electric Start Yes
Enclosure Material Steel
Enclosure Type NEMA MG1-22
Engine Brand Generac OHVI, Generac
Engine Size 530
Frequency 60
Fuel Type Liquid Propane, Natural Gas
Generator Style Standby
Grade Emergency
Height 29
Hour Meter Included Yes
Installation Location Outdoor
LP Consumption 1.12
LP Power Capacity 11000
Length 48
Low Oil Alert Yes
Made in America Yes
Manufacturer Warranty 5 Year Commercial, 5 Year Commercial (Engine), 5 Year Residential, 5 Year Residential (Engine), 5 Year
Motor RPM 3600
Mounting Pad Included Yes
Mounting Pad Material Composite
NG Power Capacity 10000
Natural Gas Consumption 124
Noise Rating 63 dbA at 7m
Number of Cylinders 2
Outdoor Sound Level (dba) 63
Phase 1
Product Weight 407
RPM (High) 3600
Rated Amps 45.8 Amps @ 240 Volts (Single Phase)
Run Watts 11000
Starting System Electric
Transfer Switch Included No
UL Listed Yes
Voltage 120, 240
Voltage Meter No
Wattage 11000
Width 25

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

Generac 6439 Reviews

Buy the Generac 6439 in Liquid Propane / Natural Gas at Research Generac 6439 in Liquid Propane / Natural Gas online. Find Generac 6439 in Liquid Propane / Natural Gas features and specifications. Get the best deal by comparing the Generac 6439 in Liquid Propane / Natural Gas today.

Recently viewed items
  • Generac 6439
    Generac 6439

    11kW, 120/240V Home Standby Generator fr...

× Shipping Rates & Methods

The cost to ship items varies by item, shipment and shipping option.

Free Ground Shipping on Orders Over $49 *

Standard ground shipping transit time is 5-7 business days.

Free Freight Shipping on Orders Over $1500 *

Curb side delivery (also called freight or "LTL" shipping) is reserved for large, heavy, or oversized items like chandeliers, bathtubs, shower doors, etc. Items are palletized and loaded onto a large truck for shipment, and delivered to your curb by scheduled appointment. Transit time is 7-10 business days.

* For exact shipping costs, add the product(s) to your cart and enter your zip code. All offers pertain to the lower 48 states and do not include deliveries to Alaska, Hawaii or Canada.

Learn more about shipping rates and policies