040590 12KW – 5 Year Warranty

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.
12 kW Standby Generator System
Engine BrandBriggs & Stratton
Engine SeriesVanguard™
OperationFully Automatic
Voltage (V)120/240V AC, Single Phase, 1.0 pf
Alternator TypeComputer Friendly
Weekly ExerciserYes
Battery/Battery ChargerYes
Overcrank ProtectionYes
Diagnostic Alerts With Remote System StatusLow 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
Warranty (Product)***5 Year Parts, Labor & Travel Limited Warranty
Running Amperage LP50
Running Watts LP12,000
Fuel Consumption Cubic Feet per Hour at Half Load LP50% load = 2.36 gal/hr
Running Amperage NG45.8
Fuel Consumption Cubic Feet per Hour at Half Load NG50% load = 119 ft³ /hr
Running Watts NG11,000
Hour MeterDigitalDisplay
Warranty Consumer Product Info5 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