Briggs and Stratton 20 kW

20 kW1 Fortress Standby Generator System
10 Year Warranty – Dealer Exclusive
Back-up power for medium to large sized homes

Model 040547

Losing power is nothing to worry about any more with the 20 kW1 generator. When the power goes out your backup generator seamlessly provides power to your home within seconds of a power outage.
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Symphony II®

Thanks to Symphony® II Power Management System, a smaller home generator system by Briggs & Stratton can meet all your needs and save you money in the process.
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10 Year Parts, Labor & Travel Limited Warranty

The longest warranty in the industry. Our most comprehensive 10 year parts, labor & travel limited warranty. Exclusive to Briggs and Stratton dealers.
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Commercial-Grade Engine

A commercial-grade Vanguard™ engine means powerful performance when it matters most.
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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.
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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 compliancy with the stringent National Fire Protection Agency 37 standard.
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Financing Solution

We have partnered with Synchrony to provide financing solutions that fit your needs. Special financing* is available on qualified Briggs & Stratton Standby Generators on the Briggs & Stratton Standby Power Credit Card.
*Subject to credit approval Minimum monthly payments required.
Running Watts (LP)
Running Watts (NG)
Engine Brand:
Briggs & Stratton
Engine Series:
Engine Displacement (cc)
Fully Automatic
Voltage (V)
120/240V AC, Single Phase, 1.0 pf
Running Amps (LP)*
Running Amps (NG)*
Alternator Type
Computer Friendly
LP Fuel Consumption**
50% Load = 2.31 gal/hr
NG Fuel Consumption**
50% Load = 187 ft3 /hr
Weekly Exerciser
Battery/Battery Charger
Overcrank Protection
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)
Width (in)
Height (in)
Weight (lbs)
Warranty (Product)***
8 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