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Briggs and Stratton 40394 20kW Automatic Standby Home Generator System with 100 Amp House Managing Transfer Switch (CARB)
Model#: BGSN40394

What are the different product conditions?

Brand new items;Full manufacturer warranty available
Manufacturer inspected, repaired and tested items; CPO 60 day money back guarantee
Open Box
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 40394 20kW Automatic Standby Home Generator System with 100 Amp House Managing Transfer Switch (CARB)

Model#: BGSN40394
Our Price:
Sale Price:
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$1,380.99 (24%)
Factory Shipped - Ships in 2-3 business days
This item ships freight. Need a liftgate? Details.

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.

  • Free Freight Shipping on Generators!


Permanent Protection from a Proven Performer.
Briggs and Stratton, the trusted name in power, is proud to offer their line of top quality high efficiency home generator systems. Whether you're at home or away when the power goes out, Briggs and Stratton's Home Generator Systems provide fully automatic operation and a permanent connection to natural gas or propane for years of reliable whole house standby protection. 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. No matter what the cause of the power outage, you'll be prepared for the worst by having the best, a Briggs and Stratton Standby Home Generator System.
Along with everything you need to install your generator, this bundle also comes with the Briggs and Stratton 100 Amp House Management Transfer Switch (Model# 71045). The right transfer switch makes all the difference when it comes to keeping your home and appliances powered during a power outage. Briggs and Stratton transfer switches deliver the quality and performance you've come to expect by providing a safe and reliable solution for detecting the shortage of power and activating your backup generator quickly and safely.
  • 20kW Automatic Standby Home Generator System - 40394
  • 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 Vangaurd 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 exhuast out away from house
  • UL 2200 and CSA C22.2 No. 100-04 standard approved
  • 100 Amp House Management Transfer Switch - 71045
  • Rated at 100 Amps at 240V
  • Ensures safety by eliminating dangerous back feeds and electrical overloads
  • Provides the ability to power all circuits without a sub-panel
  • Convenient indoor and outdoor mounting options with a durable NEMA 3R enclosure
  • Service Entrance Disconnect rated
  • Built-in AC delay and AC start-up allows pressure to bleed off AC motor and make start-ups less intrusive
  • 20kW Automatic Standby Home Generator System - 40394
  • 100 Amp House Management Transfer Switch - 71045
  • Hour Meter
  • Battery Charger
  • Polymer Installation Pad
  • Patented A/C Power Control Module


Length: 48 in.
Width: 34 in.
Depth: 31 in.
Weight: 500 lbs.
Alternator: Brushed (Computer Friendly)
Amperage - LP Vapor: 83.3
Amperage - Natural Gas: 75
CARB Compliant: Yes
Enclosure Type: Steel
Engine: Vanguard Series
Engine Displacement: 993 cc
Fuel Consumption - LP Vapor: 2.31 gal. at 50% / 3.75 gal. at 100%
Fuel Consumption - Natural Gas: 187 cubic feet at 50% / 260 cubic feet at 100%
Fuel Type: Propane (LP Vapor) / Natural Gas
Overcrank Protection: Yes
Phase: 1
Rated Watts: 20 kW
Rated Watts Output - LP Vapor: 20kW
Rated Watts Output - Natural Gas: 18kW
Service Entrance Disconnect Rated: Yes
Transfer Switch: Included
Transfer Switch Amperage: 100
Transfer Switch Enclosure: NEMA 3R
Transfer Switch Required: Briggs and Stratton Model 71045
Transfer Switch Weight: 39 lbs.
Type: Standby
Voltage: 120/240V
Voltage Regulation: Automatic


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