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Briggs & Stratton 40584 20kW Generator with Aluminum Enclosure and 200A SE Transfer Switch

Discontinued - AP Recommends Replacing with Briggs 40637
4 Stars 1 product review
Average Product Review Rating: 4/5
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The Briggs & Stratton 40584 20kW Air-Cooled Standby Generator with Aluminum Enclosure provides reliable backup power for homeowners during a power outage. This generator makes sure your appliances stay on so you and your family aren’t left in the dark. Includes outdoor/indoor NEMA 3r rated automatic power transfer switch, providing flexible installation.

Briggs & Stratton 40584 Features:

  • Corrosion resistant aluminum enclosure and stainless steel base are certified to withstand hurricane-force winds up to 175 mph
  • 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.
  • This 20kW with Symphony II Power Management can manage a 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
  • Includes 200 Amp Automatic Transfer Switch
  • Reliable, commercial-grade Briggs & Stratton Vanguard engine handles the most demanding jobs
  • Compliancy with the NFPA 37 standard means it can be placed as close as 18” from your home for flexible placement3 options — perfect for tight lot lines.
  • Automatically turns on the backup generator for your home in seconds after sensing a power outage
  • Comprehensive 5-year parts, labor and travel limited warranty
  • This standby generator is available for sale in all 50 states
  • Rated for operation in areas with low natural gas pressure. This home generator can operate at 3.5’’ to 7’’ water column.


40346 Specifications Sheet 40584 Specifications Sheet
Transfer Switch Specifications Sheet Transfer Switch Specifications Sheet
40346 Warranty 40584 Warranty

Product Reviews

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  1. Briggs and Stratton 20 kw generator

    4 star rating Product Review Rating: 4/5

    Posted by on Mar 27, 2018

    Great standby automatic generator only complaint is that it is factory preset to run 20 minutes on it's exercise cycle and cannot change the length of time it runs.

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