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The Briggs & Stratton smart circuit standby generator system w/ 400-amp (2x200a) service entrance ats (20kw lp/18kw ng) has been discontinued and is not available for purchase at this time.

Briggs & Stratton Smart Circuit Standby Generator System w/ 400-Amp (2x200A) Service Entrance ATS (20kW LP/18kW NG)

(Based on expert analysis, manufacturer ratings and customer reviews)
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  • Features
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Airooled Standby Generators
20 kW
Rated Watts
First In Its Class: Never Seen Before Transfer Switch Technology
Only compatible with Briggs & Stratton generators

Smaller Transfer Switch
A cost effective, cleaner looking installation

Patented Central Air Technology Using ACCM Transfer Panel
Manages demands of up to two 5-ton central air conditioners
Intelligently powers your whole home (load dependent)

400-Amp (2 x 200A) Service Entrance Auto Transfer Switch (71058)
A UL Listed solution for 2 x 200-Amp Service Breakers
Easy install - one less switch, less wiring/time, fewer expenses

Briggs & Stratton Vanguard V-Twin Commercial Engine
Provides years of long lasting, reliable standby power

Sound Shield™ Technology
Ensures ultra-quiet, neighbor-friendly operation (Only 68 dB)

Galvanized Steel All-Climate Enclosure
Military grade paint provides a finish that reduces corrosion

Composite Mounting Pad
Reduces installation time, no need for costly concrete pad

Also Includes: Auto Bat. Charger, Synthetic Oil and Hour Meter

4-Year Limited Warranty (Parts & Labor)
  Model Number:40305PACK-D
 Manufacturer:Briggs & Stratton
 Made in USA:Yes
 Brand:Briggs & Stratton Vanguard
 HP/CC:993 cc
 Consumer Engine Warranty:4 Years
 Commercial Engine Warranty:Not Available
 Engine RPM:3600 RPM
 Low Oil Alert/Shutdown:Yes
Product Specs
 Voltage120/240 Single-Phase
 Frequency:60 Hertz
 Cooling SystemAir Cooled
 Fuel TypeLP/Natural Gas
 NG Power Capacity18,000 Watts
 LP Power Capacity20,000 Watts
 NG Consumption (50% Load)160 ft³/hr (BTU: 160,000 BTU/HR)
 LP Consumption (50% Load)1.95 gallons/hr (BTU: 176,963 BTU/HR)
 Rated Amps:83 Amps @ 240 Volts (Single Phase)
 Decibel Rating @ 7m:68 db(A)
 A/C Ton Rating2 x 5-Tons
 Mounting PadComposite (Included)
 Transfer Switch:Automatic (Included)
 Transfer Switch Amperage:400-Amps
 Transfer Switch StyleService Disconnect
 ATS Service Disconnect:Yes
 ATS Load Shedding:Built-In
 ATS Load Prioritizing:Built-In
 Battery:Not Included (350 CCA)
 UL ListedYes
 Weight:700 Lbs. (317.52 kilograms)
 Dimensions:48"L x 33"W x 30.5"H
(121.92 x 83.82 x 77.47 cm)
 Consumer Warranty:4 Years
 Commercial Warranty:Not Available

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Briggs and Stratton 50/50 Referral Rebate
  4 Questions
Q: Jim, What size gas line do I need to provide? What is the size of the hook up on this Gen. Do I need a flex line to hook it up to the shut off outside? Jim
by Jim from Pennsylvania on January 30, 2012

A: This unit has a 3/4 inch fuel inlet connection and comes with a piece of flexible fuel line that attaches the generator to the fixed piping.

The installation guide on the product page under the specs link shows the pipe sizing chart which is based on distance from the fuel source and needs to be followed. If you do not follow this chart you can easily flood or starve the engine.

Briggs 40305PACK-D

by Mike, Product Expert

Q: Jim, with the 20kw 400 amp set up is there anything else that I would need to purchase or may want? (other than the warmer.)

by Jim from Pennsylvania on January 25, 2012

A: You would want to get the cold weather kit to go with the unit, model 6030A for temperatures that drop below 32 degrees F.

Other then that you only need to have your installer provide a battery, all the wiring, gas lines and a solid base such as crushed stone, pea gravel or concrete.

Briggs Cold Weather Kit

by Mike, Product Expert

Q: Jim, I was wondering I have a homeowner who has a 100 gal propane tank on site. Is the tank that he has large enough to power a 20kw generator.
by Jim from Pennsylvania on January 20, 2012

A: A 100 Gallon tank will work with a 20kW generator, however, your customer is not going to get much backup time.

The B&S 20kW generator uses 1.95 Gal/Hr at 50% load output so your customer may only get 2 days total.

Most manufacturers recommend at least 200 Gallons of available generator fuel for long term outages.

by Mike, Product Expert

Q: Jim, looking to buy a whole house system, two Geo thermal heat and air systems and two hot water heaters. two, 200 amp service in the house. As long as I can run the down stairs heat and air we would be fine, plus one hot water. Will be running LP as fuel source.
by Mark Applin from Kentucky on January 04, 2012

A: Proper sizing of the generator is crucial to the success of any generator installation and requires a good working knowledge of electricity and its characteristics, as well as the varying requirements of the electrical equipment comprising the load.

When analyzing the electrical load, consult the manufacturer’s nameplate on each major appliance or piece of equipment to determine its starting and running requirements in terms of watts, amps and voltage. When choosing the generator output select a rating that is approximately 20 to 25% higher than the peak load (for example, if the load is about 8 kilowatts, select a 10 kW generator).

A higher rated generator will operate comfortably at approximately 80% of its full capacity and will provide a margin of flexibility if the load increases in the future.

A certified electrician should be consulted for proper sizing and installation of any generator.

by Mike, Product Expert

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Shop for the Briggs & Stratton Smart Circuit Standby Generator System w/ 400-Amp (2x200A) Service Entrance ATS (20kW LP/18kW NG) at Electric Generators Direct. Research Briggs & Stratton standby air-cooled generators online. Find Briggs & Stratton 40305PACK-D standby air-cooled generators & briggs 18 kw natural gas standby generator package 400-Amp ATS features and specifications.