Internet #311721241

Model #040621

20,000-Watt Automatic Air Cooled Standby Generator with 200 Amp Whole House Transfer Switch

Product Overview

Reliable backup power is critical for any home, the 20kW standby generator will power all of a home's electrical needs easily and automatically during a unitlity outage. Keep your family safe, comfortable, and free from the stress by being prepared with whole home backup power solution. Enabled with Amplify™ Power Management technology this back up power system will provide the right sized solution for your home.
  • California residents
  • 5 Year Limited Best in Class Warranty that covers parts, labor, and travel for the full-length of the warranty. Unlike other standby generator manufacturers, our warranty covers parts, labor AND travel for the full length of the warranty with no hidden fees.
  • Amplify™ Power Management makes your backup power go further and minimizes the impact of a power outage on your life. This system allows you to prioritize the power needs of your home through the “Standby Generator Management” smartphone app. Amplify™ offers the ability to set and change priorities of high wattage appliances, as well as, monitor your generators status all from the touch of a button. Modules sold separately.
  • Efficient alternator and smart automatic voltage regulator optimizes generator performance with tighter voltage control giving less than 5% THD for sensitive electronics and increased starting capability.
  • State-of-the-art Commercial Vanguard® Engine - the premium Vanguard® V-Twin vertical engine has been designed and engineered to deliver the most durable performance in the industry.
  • Simple Control System with a low speed run to save fuel, reduce noise and tighten control.
  • InfoHub™ Wifi Wireless Monitoring is the easy way to remotely monitor your generator to make sure your generator is ready for the next outage. With a subscription you can monitor on you computer or smartphone to instantly check generator system status, faults and more from home or away. Subscription sold separately.
  • Low Idle Mode Scheduled weekly test mode that runs at a low RPM for fewer disturbances and less fuel consumption.
  • Corrosion Resistant Durable enclosure made from automotive-grade galvanneal steel to resist rust. Its advanced powder coat paint process results in years of protection against chips and abrasions.
  • New charging system has an independent 3-stage battery charger which optimizes battery life (bulk, absorption, and float stage)
  • Superior Customer Support - Backed by nationwide dealer network and call center experts

  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Product Height (in.)
Product Length (in.)
Product Width (in.)


Emergency Use,Home Standby
Built-in inverter
CA (CARB) Compliant
CARB Compliant
Color Family
Engine Displacement (cc)
Engine Make
Briggs and Stratton
Auto Idle Control,Automatic Voltage Regulation,Built-in Fuel Gauge,Fire Resistant,LCD Display,Low Oil Shutdown,Overload Protection
Fuel Tank Capacity (gallons)
Fuel Technology
Dual Fuel
Full load fuel consumption (gallons/hour)
Half-Load Run Time
Automatic Transfer Switch
Number of Outlets
Operational Volume (dB)
Outlet Type
120/240 Single Phase
Power/Fuel Type
Natural Gas,Propane
Product Weight (lb.)
Response Time (sec.)
Running Wattage
Start Type
Electric Switch
Starting Wattage
Suggested Uses
Battery Charger,Bench Tools,Halogen Work Light,Large Appliances,Lights,Mobile Devices,Power Tools,Small Appliances,Small Electronics,Sump Pump,Well Pump
Voltage (volts)

Warranty / Certifications

Certifications and Listings
1-UL Listed,CARB Compliant,CSA Listed,FCC Listed,cUL Listed
Manufacturer Warranty
5 Year Limited

Questions & Answers


Info on model# 040609

Asked by Jim November 17, 2020

For the 20 KW How much fuel usage on propane at idle and max capacity in gallons please?

Asked by Kevin October 10, 2020

Do you give veterans discount

Asked by 17244 September 11, 2020

is this big enough to power a 3500sf house that uses 40kwh a day?

Asked by wtl September 8, 2020

I have solar panel installed on my house. I am connected to the Florida Power and Light Company ...

Asked by SolarPower June 30, 2020

Unfortunately this will depend on the specific system you are running. I would recommend consulting a local Briggs and Stratton Home Standby installer to determine this.

What kind of fuel does this use?

Asked by Lin June 5, 2020

The standby generator model used in this bundle has a model number of 040586. The model can use either natural gas (NG) or liquid propane (LP) vapor.

What kind of fuel does it use?

Asked by Lin June 2, 2020

The standby generator in this bundle can be run off of natural gas or liquid propane gas.

Does Home Depot install and provide a yearly maintenance plan or do I have to find a separate company to install & maint

Asked by Keith May 18, 2020

Thank you for your recent inquiry with The Home Depot. We offer professional services through Home Depot vetted third party companies. To get information on services offered in your area, please visit and the company selected should reach out to you and provide pricing and scheduling information. We appreciate your business and look forward to serving you in the future. -The Home Depot-

What transfer switch does it come with? Automatic? is it the symphony 2?

Asked by Thanks March 26, 2020

This bundle comes with the 200 Amp automatic transfer switch (ATS) model 071068. It is service entry rated and is compatible with the Symphony II power management system.

Since this a capital improvement does sales tax get charged at putchase.

Asked by Gene January 29, 2020

Yes there will still be sales tax included on this purchase unless you are in a state which sales tax is not included.

20,000-Watt Automatic Air Cooled Standby Generator with 200 Amp Whole House Transfer Switch - page 2

Customer Reviews

  • 8 Customer Reviews
  • 4.5 out of 5 stars overall
67% of customers recommended.
Overall Ratings
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The unit installed pretty easily. The electricians said that there was plenty of room (better tha...
The unit installed pretty easily. The electricians said that there was plenty of room (better than others) for internal wiring hook up and battery installation. Since exhaust was through the front panel, physical placement of the generator was a bit more flexible. I really like having a "smart system" like this where the transfer switch can temporarily shut off lower priority circuits during periods of peak power use. Essentially the entire house has electricity during power outages. The transfer switch comes with an internal load shedding capability for the air conditioning system and additional load shedding circuits are easily added by installing separate power control modules. In the case of our house, the electricians set up load shedding for the AC and two other high-power circuits. The generator control panel is simple to use. I was also impressed with how quiet the unit runs. Given the sales price and the extended 10 year warranty for parts and laobr, I consider this generator to be one of the best buys out there.
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Unit came ready to install. All we needed to do...
Unit came ready to install. All we needed to do is hire an electrician and find a good spot outside our house. Delivered complete except for battery (car size) which I had to purchase separately. Heavy oversized pallet deliv so watch out for that surprise. Took 3 big men to move.
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Easy install & easy operation & Maintenace ...
Easy install & easy operation & Maintenace
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Great generator and easy to service ...
Great generator and easy to service
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Great product, easy to install....
Great product, easy to install.
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No power outage yet but sure it will do the job.
No power outage yet but sure it will do the job.
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I ordered the Generator and a Cold Weather Kit on Nov 14th. The Generator has been delivered how...
I ordered the Generator and a Cold Weather Kit on Nov 14th. The Generator has been delivered however after one month and nobody can tell me when the Cold Weather Kit will be delivered. I am scheduling the Generator to be picked and returned up as it will not work without the Cold Weather Kit. I have invested many hours, including calling Briggs and Stratton directly, and I am very dissatisfied with the lack of service in filling my order. Brutal
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Response from Briggs & StrattonDecember 13, 2017
Hello, I'm sorry to hear this. I would still advise contacting our customer support center to see if there has been an update with the cold weather kit at 800-743-4115. Otherwise you can also contact local Briggs and Strattons service centers to see if those service centers have the part already in stock. You can locate Briggs and Stratton service centers by going to Briggs and Strattons website, going to the support tab and clicking "Locate a Dealer".
Generator is awesome… Got it all hooked up which...
Generator is awesome… Got it all hooked up which was quite the process but it is purring like a kitten now. Powers everything in our 4000 sf house perfectly.
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