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Briggs and Stratton 12kW Generator PowerProtect Standby Series 40666

SKU: 40666


(1 review)

Briggs and Stratton 12kW Generator PowerProtect Standby Series 40666 with 60-day Free returns, Lowest Price Guarantee and We ship worldwide. SHOP NOW!

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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.

Briggs & Stratton 12kW Standby Generator

The Briggs & Stratton 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.

Briggs & Stratton 12kW Standby Generator Ratings

Use Rating Standby Only—Requires Available Utility Grid
Voltage 120/240 Volts Single Phase
Running Watts 12kW LP Propane / 10.8kW Natural Gas
Running Amps 50 Amps LP Propane / 45 Amps Natural Gas
Main Circuit Breaker 60 Amps
Normal Operating Sound 70 dBA
Frequency Regulation ±1.0 Percent
Engine Speed 3600 RPM


Briggs & Stratton 12kW Generator

Fully automatic, it works in any weather including hurricanes, day or night. Whether you’re at home, away on vacation, or sleeping in your bed, the 12kW generator detects a power outage. Within seconds, the generator starts and signals the automatic transfer switch. The ATS switches from utility to generator power. Power management ensures your home’s essential appliances and circuits have power when they need it.Where temperatures fall below 30 degrees Fahrenheit, install a Briggs and Stratton Cold Weather Kit. The 6567 Generator Cold Weather Kit allows easier starts in temperatures below freezing with a battery warmer and oil heater. In below freezing temperatures, the battery warmer provides more power for starting the generator. Warm oil lubricates better which prolongs engine life and makes it easier to start.Installation requires the use of a Carbon Monoxide Detector inside the home to guard against CO Poisoning.This Briggs & Stratton 12kW Standby Generator is NOT rated for Prime Power Applications.* 

Battery Not included

—12 Volt, Group BCI 26 or 51, 540 Cold Cranking Amps* 

Enclosure Warranty

  • 1-Year Parts/Labor/Travel covers surface rust and corrosion.
  • 2-Year Parts/Labor/Travel covers enclosure rust through.

1 review for Briggs and Stratton 12kW Generator PowerProtect Standby Series 40666

  1. Reyna Chung (verified owner)

    The first time I got the urges to leave a comment, but this is simply a top-notch thing you can find.

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