Skip disability assistance statement.

Welcome to our website! As we have the ability to list over one million items on our website (our selection changes all of the time), it is not feasible for a company our size to record and playback the descriptions on every item on our website. However, if you have a disability we are here to help you. Please call our disability services phone line at (281) 351-5951 during regular business hours and one of our kind and friendly personal shoppers will help you navigate through our website, help conduct advanced searches, help you choose the item you are looking for with the specifications you are seeking, read you the specifications of any item and consult with you about the products themselves. There is no charge for the help of this personal shopper for anyone with a disability. Finally, your personal shopper will explain our Privacy Policy and Terms of Service, and help you place an order if you so desire.

20kW 1 Standby Generator - Back-up power for medium to large sized homes

Briggs and Stratton 040588

Features

  • Symphony ® II Power Management
  • Amplify Power Management
  • InfoHub™ Wireless Monitoring
  • Commercial Vanguard™ Engine

See More

 
Image Feature

Symphony ® II Power Management

Manages the distribution of power to your selected appliances automatically. Load management ensures the generator won't overload and shutdown so your family can continue with its daily routine. Transfer switch and modules sold separately. Learn more .

Image Feature

Amplify Power Management

Our Amplify Power Management system automatically allows you to power more high voltage appliances in your home for less. Added convenience and flexibility for you to be able to change the power priorities via wifi at any time with the ease of a free app on your smartphone. Transfer switches and modules sold separately.
Learn more .

Image Feature

InfoHub™ Wireless Monitoring

Lets you monitor your generator's status on your computer, tablet or smartphone sending maintenance reminders so your generator is always ready for the next power outage. Sold separately. Click here for more information.

Image Feature

Commercial Vanguard™ Engine

Our in-house state of the art equipment to enhance part control which makes the Vanguard™ Engine one of the best in the industry. For the dirty demanding environments, this engine is built to last.

Image Feature

Best in Class Warranty

Covers parts, labor and travel for the full-length of the warranty. 2

Image Feature

Assembled and Engineered in the USA

With domestic and foreign parts.

Image Feature

Corrosion Resistant Durable Enclosure

Made from automotive-grade galvanneal steel to resist rust. Its advanced powder coat paint process results in years of protections against chips and abrasions.

Image Feature

Low Idle Mode

Scheduled weekly test mode that runs at a low RPM for fewer disturbances and less fuel consumption. (Only on model #s 040586, 040588)

Image Feature

Flexible Placement Options

With the ability to install your generator as close as 18 inches from your home. 3

Image Feature

Superior Customer Support

Our product is backed by our nationwide dealer network and call center experts. Complete our web form below or visit the customer support portal to get your questions answered.

Image Feature

Financing Solution

We have partnered with Synchrony Bank to provide financing solutions that fit your needs. Special financing 4 is available on qualified Briggs & Stratton Standby Generators only with the Standby Power Credit Card. Learn more.

A perfect fit for any home, the 20kW 1 standby generator powers all of a home's electrical needs easily and automatically. Keep your family safe, comfortable, and free from the stress that comes with power outages.



Symphony ® II Power Management
Manages the distribution of power to your selected appliances automatically. Load management ensures the generator won't overload and shutdown so your family can continue with its daily routine. Transfer switch and modules sold separately. Learn more .

Amplify Power Management
Our Amplify Power Management system automatically allows you to power more high voltage appliances in your home for less. Added convenience and flexibility for you to be able to change the power priorities via wifi at any time with the ease of a free app on your smartphone. Transfer switches and modules sold separately. Learn more .

InfoHub™ Wireless Monitoring
Lets you monitor your generator's status on your computer, tablet or smartphone sending maintenance reminders so your generator is always ready for the next power outage. Sold separately. Click here for more information.

Commercial Vanguard™ Engine
Our in-house state of the art equipment to enhance part control which makes the Vanguard™ Engine one of the best in the industry. For the dirty demanding environments, this engine is built to last.

Best in Class Warranty
Covers parts, labor and travel for the full-length of the warranty. 2

Assembled and Engineered in the USA
With domestic and foreign parts.

Corrosion Resistant Durable Enclosure
Made from automotive-grade galvanneal steel to resist rust. Its advanced powder coat paint process results in years of protections against chips and abrasions.

Low Idle Mode
Scheduled weekly test mode that runs at a low RPM for fewer disturbances and less fuel consumption. (Only on model #s 040586, 040588)

Flexible Placement Options
With the ability to install your generator as close as 18 inches from your home. 3

Superior Customer Support
Our product is backed by our nationwide dealer network and call center experts. Complete our web form below or visit the customer support portal to get your questions answered.

Financing Solution
We have partnered with Synchrony Bank to provide financing solutions that fit your needs. Special financing 4 is available on qualified Briggs & Stratton Standby Generators only with the Standby Power Credit Card. Learn more. 1 This generator is rated in accordance with UL (Underwriters Laboratories) 2200 (stationary engine generator assemblies) and CSA (Canadian Standards Association) standard C22.2 No.100-14 (motors and generators). 2 See operator's manual or briggsandstratton.com for complete warranty details. 3 Installations must strictly comply with all applicable codes, industry standards, laws, regulations and provided installation manual. Running engines give off carbon monoxide, an ordorless, colorless, poisonous gas, so it is important to keep exhaust gas away from any windows, doors, ventilation intakes or crawl spaces. The installation manual contains specific instructions related to generator placement in addition to NFPA 37, including the requirement that carbon monoxide detectors be installed and maintained in your home or business. 4 Subject to credit approval. Minimum monthly payments required.

Features

  • Symphony ® II Power Management
  • Amplify Power Management
  • InfoHub™ Wireless Monitoring
  • Commercial Vanguard™ Engine
  • Best in Class Warranty
  • Assembled and Engineered in the USA
  • Corrosion Resistant Durable Enclosure
  • Low Idle Mode
  • Flexible Placement Options
  • Superior Customer Support
  • Financing Solution
Model 040588
Starting MSRP $4,949.00
Running kW (LP)* 20
Running kW (NG)* 18
Running Amps (LP)* 83.3
Running Amps (NG)* 75.5
Engine Brand Vanguard ®
Phase 1-Phase
Circuit Breaker Amps 100
Frequency (Hz) 60
Engine Displacement (cc) 993
Voltage (V) 120/240
Enclosure Materials Aluminum
Sound Level (dBA) at 7 Meters Low Idle Mode - 64 No Load - 67
NG Fuel Consumption at 50% Load** (BTU/hr) 150,000
LP Fuel Consumption at 50% Load** (BTU/hr) 152,000
Length (in) 50.5
Width (in) 33.3
Height (in) 30.6
Weight (lbs) 440
Warranty (Product)*** 5 Year
Battery Charger Included
Power Management 6 Exercise Length Options

Professional delivery and installation is available for every product we sell. We would be happy to coordinate delivery and installation for you.

Extended warranties are usually very inexpensive and can save you thousands in the future. It's simple and inexpensive to purchase extended warranties and one of the smartest ways to protect your investment.

Lawn equipment can be large, heavy and expensive. You probably don't have the special tools or expertise needed to fix them in a crisis. If you can spare a few thousand dollars without batting an eyelash for new lawn equipment should they break tomorrow, don't buy a warranty. But if you're like most of us, protect yourself by purchasing inexpensive extended warranties when you buy a new product and save yourself big money in the long run.