Briggs and Stratton 12kW Generator
The Briggs and Stratton 12kW Generator fits into the landscape with a size and shape that compares to a central air conditioner—half the size of competing brands. Ideal for replacement or upgrade with an existing compatible automatic transfer switch. Briggs & Stratton’s 12kW standby generator model 40666 does not include a transfer switch. Compatible with Amplify and Symphony II Power Management.
Rated for Installation 18-inches from the home with front-facing exhaust.
Briggs & Stratton PowerProtect Standby Generators carry the most comprehensive warranty in their class. The 6-Year* Limited Warranty covers parts, labor, and travel for the entire 6-year term. Made in the USA with a commercial-grade engine. With a compatible automatic transfer switch, the Briggs and Stratton 12kW Standby Generator with Power Management keeps all your essentials running throughout any power outage.
The 12kW Standby Generator has a 570 cc V-Twin OHV Vanguard commercial grade engine equipped with Low Oil Shutdown to prevent engine damage. This generator also features high temperature shutdown, LED display, and a built-in battery charger.
12/11kW (LP/NG) 6-year warranty Steel Standby Generator
Product Specifications
Model Number 40666
Manufacturer Briggs and Stratton
Made In USA
Rated Watts 12kW LP Propane / 10.8kW Natural Gas
Rated Amps 50 Amps LP Propane / 45 Amps Natural Gas
Voltage 120/240 Volts Single Phase
A/C Ton Rating 3-Ton
Enclosure Aluminum Enclosure with Galvanneal Steel Base
UL Listed UL-2200
Decibel Rating 64 dBA Low Idle / 70 dBA Normal Operation
Type Standby Generator
Series Name PowerProtect
Features Automatic- Starting System, Automatic, Low Oil Alert, Low Oil Shutdown, Mainline Breaker 60 Amps
Battery Requirement- 12-Volt, Group 26 or 51, 540 CCA not included
Weight- 361 lbs
Dimensions- 28L x 24.5W x 37.2H
Warranty Information/Consumer Warranty
Briggs and Stratton 5-Year Limited Warranty Covers Parts, Labor, and Travel
Engine Brand- Vanguard Commercial Grade OHV
Engine Size- 623cc
Engine RPM- 3600
Dura-Bore Cast Iron Cylinder Sleeves
Air Cooled
Alternator Type- Self-Excited, Rotating Field
Frequency-60 Hz
Auto Voltage Regulation
Fuel Type- Natural Gas or LP Propane
NG Power Capacity- 10.8kW
LP Power Capacity- 12kW
NG Consumption @ Full Load- 172 Cubic Feet per Hour
NG Consumption @ Half Load- 117 Cubic Feet per Hour
LP Consumption @ Full Load- 2.3 Gallons per Hour
LP Consumption @ Half Load- 1.7 Gallons per Hour