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Briggs and Stratton 40396 20kW Automatic Standby Home Generator with Dual 200 Amp Symphony II Whole House (SED) Transfer Switch (CARB)
Model#: BGSN40396

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Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 60 day money back guarantee
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New or Recon items with possible minor cosmetic damage; CPO 60 day money back guarantee
Returned items inspected, repaired and tested by CPO technicians; CPO 60 day money back guarantee

Briggs and Stratton 40396 20kW Automatic Standby Home Generator with Dual 200 Amp Symphony II Whole House (SED) Transfer Switch (CARB)

Model#: BGSN40396
Our Price:
Sale Price:
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$1,340.99 (19%)
Factory Shipped - Ships in 2-3 business days.
Not guaranteed for 12/24 delivery.
Free Freight Shipping (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.


CARB Compliant Product - This product meets CARB regulations and is available for sale and use in the state of California.
Permanent Protection from a Proven Performer.
Stop worrying about losing power in your home with the Briggs & Stratton 40396 20kW Automatic Standby Home Generator with Dual 200 Amp Symphony II Whole House (SED) Transfer Switch. It seamlessly provides backup power to your home within seconds of a power outage with fully automatic operation and a permanent connection to natural gas or propane for years of reliable whole house standby protection. A superior design means half the size, half the sound, half the fuel consumption, and half the price of most competitive systems while providing quality and peace of mind. Lights, TVs, a washer, a dryer and even two 5 Ton AC units are easily and automatically powered by a dependable commercial-grade Vanguard engine and the new, patented Symphony II Power Management technology.
  • 20kW Automatic Standby Home Generator System - 40336
  • Whole house power management system powers all your household appliances and up to two air conditioners
  • Automatically powers your home in seconds after sensing a power outage
  • Commercial-grade Briggs & Stratton Vanguard engine provides reliable and dependable power to the generator
  • Can be placed as close to 18 in. (where NFPA codes allow) from the home to provide more placement options
  • Rust-resistant Galvanneal steel enclosure offers years of protection against natural wear and tear and high temperatures
  • Thermal protected fuel system automatically shuts off in event of fire or hazard
  • Unique front airflow ventilation technology pushes engine exhaust out away from house
  • UL 2200 and CSA C22.2 No. 100-04 standard approved
  • Dual 200 Amp Symphony II Whole House (SED) Transfer Switch - 71057
  • Symphony II Power Management allows you to select up to 8 high-wattage appliances and manages the distribution of power from the generator to those appliances automatically
  • Wired into your home’s existing wiring, it monitors your home’s electrical circuits, so you save even more on the cost of installation
  • Load management ensures the generator won’t overload so your family can continue with its daily routine uninterrupted
  • Measures 7 in. x 24 in. x 37 in. and weights 105 lbs.
  • 20kW Automatic Standby Home Generator System - 40336
  • Dual 200 Amp Symphony II Whole House (SED) Transfer Switch - 71057
  • Battery Charger
  • Hour Meter
  • Polymer Installation Pad
  • Patented A/C Power Control Module


Length: 47 in.
Width: 29 in.
Height: 31 in.
Weight: 500 lbs.
Alternator: Brushed (Computer Friendly)
Amperage - LP Vapor: 83.3
Amperage - Natural Gas: 75
CARB Compliant: Yes
Cooling System: Air Cooled
Enclosure Type: Galvaneal Steel
Engine: Briggs & Stratton Vanguard OHV Engine
Engine Displacement: 993cc
Fuel Consumption - LP Vapor: 1.97 gal. at 50% / 3.14 gal. at 100%
Fuel Consumption - Natural Gas: 163 cu-ft. at 50% / 244 cu-ft. at 100%
Fuel Type: Propane (LP Vapor) / Natural Gas
Operating RPM: 3,600
Phase: 1
Rated Watts Output - LP Vapor: 20kW
Rated Watts Output - Natural Gas: 18kW
Type: Standby
Voltage: 120V / 240V
Voltage Regulation: Automatic


Product Reviews

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  • 20kW Automatic Standby Home Generator with Dual 200 Amp Symphony II Whole House (SED) Transfer Switch (CARB)


    Does this include the battery?
    Asked on 9/16/2014 by Mel

    0 answers

  • 20kW Automatic Standby Home Generator with Dual 200 Amp Symphony II Whole House (SED) Transfer Switch (CARB)


    Briggs & Stratton 40396 - 20kW Standby Generator System w/ 400-Amp Service Entrance Switch, Could I use this system as my main power supply in my mobile home, due to the fact that the municipal power supply is inadiquate for my power load? My "trailer is requiring a minimum of 125A feed, currently it only gets 60A feed but draws more- so I think propane would be cheaper.
    Asked on 11/12/2012 by James Cameron from Clearwater, BC, Canada

    0 answers

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Briggs and Stratton Portable Generator Limited Warranty

Briggs and Stratton Power Products Group, LLC will repair or replace, free of charge, any part(s) of the portable generator that is defective in material or workmanship or both. Transportation charges on product submitted for repair or replacement under this warranty must be borne by purchaser. This warranty is effective for the time periods and subject to the conditions stated below. For warranty service, find the nearest Authorized Service Dealer in the dealer locator map at

THERE IS NO OTHER EXPRESS WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM PURCHASE, OR TO THE EXTENT PERMITTED BY LAW. ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE EXCLUDED TO THE EXTENT EXCLUSION IS PERMITTED BY LAW. Some states or countries do not allow limitations on how long an implied warranty lasts, and some states or countries do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state or country to country.


  • Consumer Use - 2 Years* (*2nd Year Parts Only)
  • Commercial Use - 1 Years

The warranty period begins on the date of purchase by the retail consumer or commercial end user, and continues for the period of time stated above. "Consumer use" means personal residential household use by a retail consumer. "Commercial use" means all other uses, including use for commercial, income producing or rental purposes. Once equipment has experienced commercial use, it shall thereafter be considered as commercial use for purpose of this warranty.



We welcome warranty repair and apologize to you for being inconvenienced. Any Authorized Service Dealer may perform warranty repairs. Most warranty repairs are handled routinely, but sometimes requests for warranty service may not be appropriate. For example, warranty service would not apply if equipment damage occurred because of misuse, lack of routine maintenance, shipping, handling, warehousing or improper installation, Similarly, the warranty is void if the manufacturing date or serial number on the portable generator has been removed or the equipment has been altered or modified. During warranty period, the Authorized Service Dealer, at it's option, will repair or replace any part that, upon examination, is found to be defective under normal use and service. This warranty will not cover the following:

  • NORMAL WEAR: Outdoor Power Equipment, like all mechanical devices, needs periodic parts and service to perform well. This warranty does not cover repair when normal use has exhausted the life of a part or the equipment.
  • INSTALLATION AND MAINTENANCE: This warranty does not apply to equipment or parts that have been subjected to improper or unauthorized installation or alteration and modification, misuse, negligence, accident, overloading, overspeeding, improper maintenance, repair or storage so as, in out judgement, to adversely affect its performance and reliability. This warranty also does not cover normal maintenance such as filters, adjustments, fuel system cleaning and obstruction (due to chemical, lime, dirt, and so forth).
  • OTHER EXCLUSIONS: This warranty excludes wear items such as o-rings, filters, etc., or damage or malfunctions resulting from accidents, abuse, modifications, alterations, or improper servicing or freezing or chemical deterioration. Accessory parts, such as starting batteries, generator adapters cord sets and storage covers are excluded from the product warranty. This warranty excludes used, reconditioned and demonstration equipment and failures due to acts of God and other force majeure beyond the manufacturers control.


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Certain items require 2-3 business days to ship and is clearly indicated on the product page. These items cannot be expedited.

Delivery times on Economy and Freight orders vary, exact delivery date cannot be determined.

Freight orders cannot be guaranteed by 12/24 delivery.