12 kW Standby Generator System Product Image

12 kW Standby Generator System

Model Number: 040590

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Gain the peace of mind that comes with owning the new 12 kW generator by Briggs & Stratton®. Now 60% quieter* and 50% smaller than our old 12kW, you don’t have to compromise your homes curb appeal to get the protection of automatic backup power. With its sleek and compact profile, the 12 kW Home Standby Generator adds a new dimension to “Powering More for Less.” Perfect for small to medium-sized homes, the new 12kW Generator by Briggs & Stratton® combined with our Symphony® II Power Management System allows you to meet the power needs of your whole house, (including up to two 4-ton air conditioners). To guarantee quality and performance, we offer a 5 year parts, labor and travel limited warranty.

Learn More About 12kW Generator (PDF)

*Based on no load sound power.

Managed Whole House Power

Not all appliances are powered equally. Some, such as your central air conditioner, electric clothes dryer, electric stovetop, oven, or whirlpool tub, require a large amount of power to start up or operate properly.

The Symphony® II Power Management orchestrates these high-demand appliances with lower-demand items to give you true whole-house power with a smaller, more affordable generator.

Product Details


Durable Enclosure

Designed to weather the elements, the system's enclosure is made from automotive-grade Galvanneal steel to resist rust. Its advanced powder coat paint process results in years of protection against chips and abrasions.

Now 60% Quieter*

Powered by our high-quality Vanguard engine, improved muffler design and re-engineered alternator intake ducting, the new 12kW is 60% quieter than our old 12kW.

Superior Customer Support

Shopping for the right standby generator for your home can be confusing, but GridIron will be with you every step of the way. Contact our Canadian based customer service representatives by calling 1-877-829-0013 or visit the Customer Support Portal to get your questions answered now.

Streamlined, Space-Saving Design

With the streamlined, compact design, the new 12k2W is 50% smaller than our previous 12kW generator.

Flexible Placement

Have a tight lot line? Worried about your curb appeal? Install your generator as close as 18" for your home. Our generators are in compliance with the stringent National Fire Protection Agency 37 standard.

Financing Solution

We have partnered with Synchrony to provide financing solutions that fit your needs. Special financing is available for qualified Briggs & Stratton Standby Generators on the Briggs & Stratton Standby Power Credit Card.

*Subject to credit approval Minimum monthly payments required

5 Year Parts, Labor & Travel Limited Warranty

Our customer-friendly 5 year parts, labour & travel limited warranty is one of the most comprehensive in the industry.

*Based on no-load sound power. Not for Prime Power or use where standby systems are legally required, for serious life safety or health hazards, or where lack of power, hampers rescue of fire-fighting operations.

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) .

Installations must strictly comply with all applicable codes, industry standards, laws, regulations and provided installation manual. Running engines give off carbon monoxide, an odorless, colorless, poisonous gas so it is important to keep exhaust gas away from any windows, doors, ventilation intakes or crawl spaces. The installation manual contains specific instructions related to generator placement in addition to NFPA 37, including the requirement that Carbon monoxide detectors be installed and maintained in your home.

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Download the operator's manual or illustrated parts list for your Briggs & Stratton engine or equipment by following our step-by-step process.

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12 kW Standby Generator System

Engine Brand Briggs & Stratton
Engine Series Vanguard™
Operation Fully Automatic
Voltage (V) 120/240V AC, Single Phase, 1.0 pf
Alternator Type Computer Friendly
Weekly Exerciser Yes
Battery/Battery Charger Yes
Overcrank Protection Yes
Diagnostic Alerts With Remote System Status Low Oil Shutdown, Engine Does Not Start, Low Frequency, Engine Overspeed, Low Voltage, Low Battery Voltage, Oil Temp High, Transfer Switch Fault
Length (in) 28
Width (in) 26
Height (in) 37.2
Weight (lbs) 318
Enclosure Gray
Warranty (Product)*** 5 Year Parts, Labor & Travel Limited Warranty
Running Amperage LP 50
Running Watts LP 12,000
Fuel Consumption Cubic Feet per Hour at Half Load LP 50% load = 2.36 gal/hr
Running Amperage NG 45.8
Fuel Consumption Cubic Feet per Hour at Half Load NG 50% load = 119 ft³ /hr
Running Watts NG 11,000
Displacement 627cc
Hour MeterDigitalDisplay
Warranty Consumer Product Info 6 Year Parts, Labor & Travel Limited Warranty

*NG = Natural Gas; LP = Liquid Propane.

**Fuel consumption rates are estimated based on normal operating conditions at 1/2 load. Generator operation may be greatly affected by elevation and the cycling operation of multiple electrical appliances - fuel flow rates may vary depending on these factors.

***See Operator's Manual for complete warranty details

Cold Weather Kit

The Briggs & Stratton Cold Weather Kit ensures smooth starting and reliable operation in the winter months. The thermostatically controlled battery warmers and oil heaters activate as the temperature drops to -29°C

Maintenance Kit

Briggs & Stratton maintenance kits help you complete scheduled maintenance and prevent costly repairs on your standby generator. Maintenance kits are designed specifically for your generator’s needs.

Infohub™ Wireless Monitor

Infohub™ sends notifications to your computer, tablet, smartphone and/or dealer with your generator status, maintenance needs and service schedule reminders. Simple, hands-free and affordable, Infohub™ is a good choice for wireless monitoring.

Questions? Contact Us now!