20kW Home Generator NG/LP and Dual 200 Amp Split 400 Amp Service Rated ATS with Symphony II Power Management by Briggs and Stratton | 40396
Briggs and Stratton

Briggs & Stratton 20kW standby generators provide backup electricity for your air conditioner, appliances, lights, TVs or computers and give you the peace of mind to take charge. Ideal for large-sized homes, Briggs & Stratton standby generators can dependably power your home’s essential power needs with flexible power options.

Managed Whole House Power

Permanent Protection From A Proven Performer

Manages Power to All of Your Appliances - Managed Whole House Power system powers your household appliances plus up to 2 air conditioners with patented Symphony II Power Management, requires the purchase of Symphony II Remote Modules.  Up to 8 modules can be added to ensure the generator won’t overload.

Quick Response – Automatically powers your home in seconds after sensing a power outage.

Reliable Engine Power – Briggs & Stratton standby generators are powered by commercial-grade Vanguard™ engines that are design-engineered to dependably take on the most demanding jobs.

Flexible Placement –Tested against tough National Fire Protection Agency standards, Briggs & Stratton 16kW¹/20kW¹ standby generators can be placed as close as 18” from the home providing more placement options in your yard - perfect for tight lot lines.

Durable Enclosure – Rust-resistant, Galvanneal steel enclosures are made from the same materials and paint process used in the automotive industry, resulting in years of protection against chips and abrasions.

5 Year Limited Parts and Labor Warranty – At Briggs & Stratton, we stand behind our warranty and make it easy for our customers to work with us.

Protecting Your Family and Home - Thoroughly tested against National Fire Protection Standards, the 20kW¹ standby generator has a thermally protected fuel system which automatically shuts off the unit in the event of a fire.  Allsteel enclosure and base endure temperatures more than double that of aluminum and far beyond that of plastic.

Front Air Ventilation - Featuring unique airflow technology, the standby generator’s design pushes engine exhaust out the front of the unit and directly away from the house.

Transfer Switch - Flexible, indoor or outdoor, transfer switch placement make it convenient to install. All of our weatherresistant transfer switches are NEMA 3R rated for maximum protection against dirt, rain, sleet and snow.

Package Includes:
Model 71057

Dual 200 Amp/Split 400 Amp Automatic Transfer Switch with patented Symphony II Power Management.

  • What does this transfer switch mean for your home? Less Wiring, less installation time and less expense compared to traditional 400-amp installations.
  • The Dual 200 Amp Transfer Switch/Split 400 Amp replaces the need for two 200 amp transfer switches in standard split 400A service homes with two 200A distribution panels.
  • This convenient and affordable solution to managed whole house backup power for larger homes and small business is exclusive to Briggs & Stratton.
  • With a smaller footprint provided by combining two automatic transfer switches into one, the Dual 200 amp Transfer Switch/Split 400 Amp results in a smaller, cleaner looking installation for your home or business.

- Installation Base
- Battery Charger
- Hour Meter

Options - Sold Separately

The addition of remote power generator modules adds a managed power option which allows the generator to supply power to all your home's high-voltage, high current appliances including dryers, hot water heaters, and well pumps.  Installed directly to a home's exisitng wiring Symphony II automatically manages the distribution of power to the electrical loads, providing power where it's needed while preventing a generator overload.

Maintenance kits include everything necessary to keep your generator running and supplying power, even through extended outages with oil and air filters, filler funnel, and spark plugs. Cold weather kits add two oil warmers and a battery warmer for easier and more reliable starts in cold weather down to -25 Fahrenheit.

Add a wireless monitor and keep track of your generator from indoors and eliminate trips outside during inclement weather.

 This generator is rated in accordance with UL (Underwriters Laboratories) 2200 (stationary engine generator assemblies) and CSA (Canadian Standards Associations) C22.2 No. 100-04 (motors and generators).

Warranty details available at briggsandstratton.com.
Fuel consumption rates are estimated based on normal operating conditions. Generator operation may be greatly affected by elevation and  the cycling operation of multiple electrical appliances – fuel low rates may vary depending on these factors.
Review local codes to determine if a transfer switch with separate service disconnect is required.
You must verify the actual starting amp requirement for your air conditioner(s).


Country Living
Comment by Jim C. on 9th Nov 2014

My Mom and Dad are both in their 80's and live in the country. With the installation of the 6551 I can rest assured that they will never be without power, heat, ac and water. this is a great unit and worked perfectly upon startup. Should have installed this a lot sooner for them.

By the way, my son-in-law also has one for his home. I live in a motorhome or I would have one also.

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