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Model#: BGSN40582

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Briggs & Stratton 40582 20kW Generator with Aluminum Enclosure and 100 Amp Symphony II Switch

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  • Briggs & Stratton 40582 20kW Generator with Aluminum Enclosure and 100 Amp Symphony II Switch
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(continental U.S.)

Freight Orders

Freight deliveries require a delivery time be scheduled and someone must be present at the time of delivery to inspect and sign for the merchandise. A representative from the freight carrier will call the phone number entered at checkout to schedule the delivery.

Liftgate Service

For freight deliveries, you have the option of adding a liftgate to your delivery. A liftgate is the device that lowers a product from the truck to ground level.

CPO recommends adding liftgate service for freight deliveries exceeding 100 lbs if you do not have a loading dock or fork lift at the delivery address. Additional charges may apply. The liftgate option will be presented during the checkout process.

Please note that liftgate service only ensures the product is removed from the truck. We recommend you have the additional help of two to four people to move the product to its desired location because drivers are not required to assist.

Requesting liftgate service after ordering may result in additional charges and delays.

Ships in 2-3 business days


Stop worrying about losing power in your home with 20 kW standby generator system. The 20 kW seamlessly provides backup power to your home within seconds of a power outage. Lights, TVs, washer and dryer - even two 5-ton AC units - are easily and automatically powered by a dependable commercial-grade Vanguard engine and new, patented Symphony II Power Management technology. The 20 kW system also comes with a 5-year, labor, and travel limited warranty.
  • Includes 100 Amp automatic transfer switch with flexible indoor/outdoor installation
  • This 20 kW with Symphony II Power Management module which is sold separately can manage your home, up to 12,000 square feet with a 5-ton air conditioner saving you thousands less than a previously required larger, liquid cooled unit
  • Closer placement options as close as 18 in. from your home per the National Fire Protection Agency 37 standard
  • Built from the Galvanneal steel used in the automotive industry for long-term durability
  • Rated for operation in areas with low natural gas pressure, can operate at 3.5 in. to 7 in. water column
  • Comprehensive 5-year parts, labor, and travel limited warranty
  • For California residents, warning causes cancer and reproductive harm
  • 20kW Generator - 40582
  • 100 Amp Symphony II Transfer Switch
  • Battery Charger
  • Hour Meter
  • Installation Pad
  • Operator's Manual
  • Installation Manual
Compliance and Restrictions
warning: Cancer and Reproductive Harm --


Length: 47 in.
Width: 31 in.
Height: 31 in.
Weight: 440 lbs.
Alternator Type: Computer Friendly
Amperage (Natural Gas): 75
Amprage (LP Vapor): 83.3
CARB Compliant: NA
Engine Make: Briggs & Stratton
Engine Model: Vanguard
Engine Speed (RPM): 3600
Fuel Type: Gas/Liquid Propane
Max Wattage: 22000
Motor Phase: 1
Noise Rating (dBA): 68
Power Source: Gas
Rated Watts (LP Vapor): 20000
Rated Watts (Natural Gas): 18000
Transfer Switch Circuits: Whole House
Transfer Switch Included: Yes
Transfer Switch Model Number: 71071
Transfer Switch Voltage: 120V/240V
Voltage Regulation: Yes



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