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Model # 40482
MSRP: $3,699.99
Every Day Price: $3,299.00
You Save: $400.99
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12kW Standby Generator with 150 Amp Automatic SE Transfer Switch by Briggs & Stratton 40482

  • Briggs & Stratton Engine - Application engineered to stringent home generatorspecifications, these premium engines will provide years of long-lasting, reliable standby power
  • Advanced electronics will detect a utility power outage and automatically start the generator whether you are home or away
  • Advanced Power management - Up to two load-dependent air conditioner units: 4-ton air conditioners
  • Includes 150 Amp Automatic Transfer Switch Rated NEMA 3R
  • Galvanneal steel provides years of rustproof, outdoor protection
  • 3 Year Limited Parts and Labor Warranty


Details and Specifications

The new streamlined Briggs & Stratton 12kW* Home Generator System meets the power needs of your whole house, with a smaller, more affordable unit. Briggs & Stratton automatic home generators provide permanent, backup protection from power outages for your home, and your family.

Install Within 20" of the Home - Where Code Allows.


Fully Automatic: Advanced electronics will detect a utility power outage and automatically start the generator whether you are home or away

  • Advanced Power Management: Combine with a Briggs & Stratton® automatic transfer switch to manage up to two load-dependent 3-ton air conditioner units
  • Streamlined, Space Saving Design: Its sleek, compact profile blends in beautifully with your home’s exterior and landscaping, much like your central air conditione.
  • Durable Outdoor Enclosure: Galvaneal steel provides years of rust proof, outdoor protection – perfect for extreme weather conditions.
  • Maximum Fuel Economy: Smart management of your homes appliances results in less fuel consumption than larger, more fuel hungry generators.
  • Limited 3 Year Parts and Labor Warranty: Your Briggs & Stratton guarantee of quality and performance – one of the best in the industry.
  • Briggs & Stratton® Engine: Application engineered to stringent commercial specifications, these premium engines will provide years of long lasting, reliable standby power. Because Engines Matter.
  • Turn-Key Extras Included: Battery charger, flex fuel line, hour meter, and  installation base
  • Battery Requirement (Battery Not Included): 12 Volt DC, 600 CCA (cold cranking amps), AGM Type with M6 terminal hardware, Recommend Werker Model WKA12-55C/FR

Includes Model 71069:
150 Amp Automatic Transfer Switch
Rated Nema 3R, for Outdoor Installations
Fully Automatic with Service Entrance Disconnect

*This generator is rated in accordance with UL (Underwriters Laboratories) 2200 (stationary engine generator assemblies) and CSA (Canadian Standards Association) standard C22.2 No. 100-04 (motors and generators).

** See BriggsandStratton.com for warranty details



Briggs & Stratton $50/$50 Rebate - Click Here

Warranty Information

Consumer Warranty: 3 Year Limited

Product Specifications

Model Number 40482
Manufacturer Briggs & Stratton
Rated Watts 12kW
Rated Amps 50 LP/45.8 NG
Voltage 120/240V Single Phase
A/C Ton Rating 4 Tons
Enclosure Galvaneal Steel
UL Listed Yes
Decibel Rating 72 db(A)
Starting System Electric Start/Automatic
Low Oil Alert Yes
Hour Meter Yes
Mounting Pad Yes
Product Weight 535 lbs.
Dimensions (Inches) 34.6L x 39.4W x 38.5H
Engine Brand B&S Professional Series
Engine Size 803 cc
Engine RPM 3600
Cooling System Air Cooled
Alternator Type Brushless, Computer Friendly
Frequency 60 Hz
Fuel Type Natural Gas/LP (Propane)
NG Power Capacity 11kW
LP Power Capacity 12kW
NG Consumption @ Full Load 197 cu.ft/hr
NG Consumption @ 1/2 Load 119 cu.ft/hr
LP Consumption @ Full Load 2.36 gal/hr
LP Consumption @ 1/2 Load 1.42 gal/hr
Transfer Switch
Transfer Switch Model 71069
Transfer Switch Amps 150 Amps
Transfer Switch Circuits Whole Service
ATS Poles 2 Pole
Warranty Information
Consumer Warranty 3 Year Limited
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Shipping Terms

All generators include 24 hour delivery notification and residential delivery. Liftgate service is available on all air-cooled generators and some liquid cooled units – Please call for verification. Free Shipping is curbside service only. Curbside service means the freight company will deliver to your address and lower your generator to the ground. The freight company will not back down driveways, place a generator in a building or where it is being installed. You are responsible for arranging the movement and setting of the generator.

Some restrictions apply to "Free Shipping" you may either view our
Shipping Information page or contact us for details.