040587 20KW – 6 Year Warranty

Our dealer exclusive Fortress standby generator line comes with great additional features. We offer the longest premium level of protection in the industry with a 6-year parts, labor and travel warranty. These generators come equipped with oil warmers for when the temperature drops to -1°C or lower.

Losing power is nothing to worry about any more with the 20 kW generator. During a power outage, your backup generator provides power to your home within seconds. Lights, TVs, washer and dryer - even two 5-ton AC units - are easily and automatically powered by a dependable commercial-grade Vanguard™ engine and our patented Symphony® II Power Management technology.

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.
Fortress 20 kW Standby Generator System
Engine BrandBriggs & Stratton
Engine SeriesVanguard™
Engine Displacement993
OperationFully Automatic
Voltage (V)120/240V AC, Single Phase, 1.0 pf
Alternator TypeComputer Friendly
Weekly ExerciserYes
Battery/Battery ChargerYes
Overcrank ProtectionYes
Hour MeterYes
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)48
Width (in)34
Height (in)31
Weight (lbs)500
Warranty (Product)***6 Year Parts, Labor & Travel Limited Warranty
Running Watts LP20,000
Fuel Consumption Cubic Feet per Hour at Half Load LP50% load = 2.31 gal/hr
Running Watts NG18,000
Fuel Consumption Cubic Feet per Hour at Half Load NG50% load = 187 ft³ /hr
Running Amperage NG75.0
Running Amperage LP85.3
Warranty Consumer Product Info6 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