Free Freight on Most Electric GeneratorsFree Shipping On Electric Generators (Lower 48)
Home » » »
Standby Generator Sizing Calulator
Standby Generator Sizing Calulator

Briggs & Stratton 20kW Standby Generator System (Steel) (200A Service Disconnect + AC Shedding)

Briggs & Stratton 20kW Standby Generator System (Steel) (200A Service Disconnect + AC Shedding)
Our Price
Compare Prices
Shipping Info
Model: 40346
(Based on expert analysis, manufacturer ratings and customer reviews)
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
Number of Reviews (33)
Write A Review
$4,699.00
 
In-Stock
Ships Monday, Mar 25th
Free Shipping
Free Lift Gate Service - 
Enclosure
Switch Options
Add-Ons
+$99.99
Learn More
 
Learn More
In-Stock
Ships Monday, Mar 25th
Free Freight
Free Freight
Lift Gate Services
Lift Gate Service
*We currently CANNOT ship this product to Alaska, Hawaii or any destination outside of the United States
Share
  • Product Description
  • 33
    Reviews
  • 10
    Product Q&A
  • Recommended Accessories
  • How-To Articles
  • Manuals
Product Description
+−
Grade
Style
Run Watts
20,000
Rated Watts
Voltage
120/240 Single-Phase
Fuel
Engine
Grade
Emergency
Style
Standby (Air Cooled)
Run Watts
20,000
Voltage
120/240 Single-Phase
Fuel
LP/Natural Gas
Engine
Briggs and Stratton Vanguard


Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Features
Features
  • Fully Automatic Operation - Includes Automatic Transfer Switch
  • 20kW (LP) /18.4kW (NG) Automatic Start Power Generator
  • Runs off LP or Natural Gas - no gas cans to fill and store
  • 993cc Briggs & Stratton V-Twin Commercial Grade Vanguard Engine
  • Provides years of long lasting, reliable standby power
  • Symphony II Transfer Switch (2 x 5-Ton AC)
  • Computer controlled load management power switching
  • Expand your generators range by prioritizing powered circuits
  • Galvanneal Steel Enclosure
  • Automotive rust proofing paint process reduces corrosion
  • Front Air Ventilation
  • Pushes engine exhaust out the front, away from the home
  • Flexible Placement (Please Verify Local Building Codes)
  • Tested against tough National Fire Protection Agency standards
  • Can be placed as close as 18” from structure
  • 200-Amp Service Entrance Rated Automatic Transfer Switch (71068)
  • Offers ability to power all circuits without a sub-panel
  • Rated at 200-Amps @ 240-Volts (NEMA 3R)
  • Turnkey Extras: Auto Battery Charger & Hour Meter
  • Industry Leading 5-Year Warranty
  • Parts, labor & travel covered for 5-Years
Specifications
Engine
Engine Brand
Briggs and Stratton Vanguard
Starting System
12v Auto Start
CC
993 CC
Consumer Engine Warranty
5 Years
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
Yes
Product Specs
Voltage
120/240 Single-Phase
Frequency
60 Hertz
Rated Watts
20000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
18000 Watts
LP Power Capacity
20000 Watts
NG Fuel Consumption @ 50% Load
187 ft³/hr
NG Fuel Consumption @ 100% Load
260 ft³/hr
LP Fuel Consumption @ 50% Load
2.3 gallons/hr
LP Fuel Consumption @ 100% Load
3.75 gallons/hr
Rated Amps
83 Amps
Decibel Rating @ 7m Learn More Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB.
64
Transfer Switch
Automatic (Included)
Transfer Switch Amperage
200-Amps
Enclosure
Steel
Battery
Not Included (540 CCA)
A/C Ton Rating
2 x 5-Tons
Mounting Pad
Steel (Included)
Transfer Switch Style
Service Disconnect
ATS Load Prioritizing
Sold Separately
ATS Load Shedding
Built-In
ATS Service Disconnect
Yes
Cooling System
Air Cooled
UL Listed
Yes
Grade Type
Emergency
Overview
Made in USA
Yes
Weight
484 Pounds
Product Style
Standby Generator
Product Length
50.5 Inches
Product Width
34 Inches
Product Height
31 Inches
Consumer Warranty
5 Years
UPC
011675403461
Grade
Style
Run Watts
20,000
Rated Watts
Voltage
120/240 Single-Phase
Fuel
Engine
Grade
Emergency
Style
Standby (Air Cooled)
Run Watts
20,000
Voltage
120/240 Single-Phase
Fuel
LP/Natural Gas
Engine
Briggs and Stratton Vanguard


Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Features
Features
  • Fully Automatic Operation - Includes Automatic Transfer Switch
  • 20kW (LP) /18.4kW (NG) Automatic Start Power Generator
  • Runs off LP or Natural Gas - no gas cans to fill and store
  • 993cc Briggs & Stratton V-Twin Commercial Grade Vanguard Engine
  • Provides years of long lasting, reliable standby power
  • Symphony II Transfer Switch (2 x 5-Ton AC)
  • Computer controlled load management power switching
  • Expand your generators range by prioritizing powered circuits
  • Galvanneal Steel Enclosure
  • Automotive rust proofing paint process reduces corrosion
  • Front Air Ventilation
  • Pushes engine exhaust out the front, away from the home
  • Flexible Placement (Please Verify Local Building Codes)
  • Tested against tough National Fire Protection Agency standards
  • Can be placed as close as 18” from structure
  • 200-Amp Service Entrance Rated Automatic Transfer Switch (71068)
  • Offers ability to power all circuits without a sub-panel
  • Rated at 200-Amps @ 240-Volts (NEMA 3R)
  • Turnkey Extras: Auto Battery Charger & Hour Meter
  • Industry Leading 5-Year Warranty
  • Parts, labor & travel covered for 5-Years
Specifications
Engine
Engine Brand
Briggs and Stratton Vanguard
Starting System
12v Auto Start
CC
993 CC
Consumer Engine Warranty
5 Years
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
Yes
Product Specs
Voltage
120/240 Single-Phase
Frequency
60 Hertz
Rated Watts
20000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
18000 Watts
LP Power Capacity
20000 Watts
NG Fuel Consumption @ 50% Load
187 ft³/hr
NG Fuel Consumption @ 100% Load
260 ft³/hr
LP Fuel Consumption @ 50% Load
2.3 gallons/hr
LP Fuel Consumption @ 100% Load
3.75 gallons/hr
Rated Amps
83 Amps
Decibel Rating @ 7m Learn More Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB.
64
Transfer Switch
Automatic (Included)
Transfer Switch Amperage
200-Amps
Enclosure
Steel
Battery
Not Included (540 CCA)
A/C Ton Rating
2 x 5-Tons
Mounting Pad
Steel (Included)
Transfer Switch Style
Service Disconnect
ATS Load Prioritizing
Sold Separately
ATS Load Shedding
Built-In
ATS Service Disconnect
Yes
Cooling System
Air Cooled
UL Listed
Yes
Grade Type
Emergency
Overview
Made in USA
Yes
Weight
484 Pounds
Product Style
Standby Generator
Product Length
50.5 Inches
Product Width
34 Inches
Product Height
31 Inches
Consumer Warranty
5 Years
UPC
011675403461
Product Specs
+−
Specifications
Engine
Engine Brand
Briggs and Stratton Vanguard
Starting System
12v Auto Start
CC
993 CC
Consumer Engine Warranty
5 Years
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
Yes
Product Specs
Voltage
120/240 Single-Phase
Frequency
60 Hertz
Rated Watts
20000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
18000 Watts
LP Power Capacity
20000 Watts
NG Fuel Consumption @ 50% Load
187 ft³/hr
NG Fuel Consumption @ 100% Load
260 ft³/hr
LP Fuel Consumption @ 50% Load
2.3 gallons/hr
LP Fuel Consumption @ 100% Load
3.75 gallons/hr
Rated Amps
83 Amps
Decibel Rating @ 7m Learn More Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB.
64
Transfer Switch
Automatic (Included)
Transfer Switch Amperage
200-Amps
Enclosure
Steel
Battery
Not Included (540 CCA)
A/C Ton Rating
2 x 5-Tons
Mounting Pad
Steel (Included)
Transfer Switch Style
Service Disconnect
ATS Load Prioritizing
Sold Separately
ATS Load Shedding
Built-In
ATS Service Disconnect
Yes
Cooling System
Air Cooled
UL Listed
Yes
Grade Type
Emergency
Overview
Made in USA
Yes
Weight
484 Pounds
Product Style
Standby Generator
Product Length
50.5 Inches
Product Width
34 Inches
Product Height
31 Inches
Consumer Warranty
5 Years
UPC
011675403461
Reviews
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
(33)
+−
Briggs & Stratton 40346 Reviews & Ratings
96% of Reviewers Recommend This Product
Product Q&A
(10)
+−
Search Product Q&A's Answered by Jared, the Generator Expert
icon-social-fb1
+−
Does this unit have or come with a cold weather kit?
Chris 
from Indiana 
August 23, 2018
Answer
This model does not come equipped with a cold weather kit, but we do have it available as an add-on accessory here.
+−
How do I prevent the exhaust from killing grass around my unit?
Matthew 
from Florida 
July 10, 2018
Answer
According to the Install Manual for the generator, the unit requires 5 feet of clearance on the exhaust side of the unit from any vegetation. I would recommend taking out the grass in this area and laying down a bed of pea gravel or some type of paver. This is common for all standby generators.
+−
Where is the gas line connection located on the Briggs and Stratton model # 40346?
Suzy 
from North Carolina 
June 16, 2018
Answer
The gas connection on this unit is on the back right while facing the unit. This is common on all the air-cooled units from Briggs. 
+−
Hi Mike. I have about a 1800 squ. ft house that is well insulated. I have a geo thermal heat pump for furnace and ac. I also have 2 pellet stoves one up stairs and one down stairs. I have a well that is 54 ft. deep and is run by a 3/4 horse motor. I also have ham radio gear that I would like to be abele to run. I also have 2 refrigerators a electric stove an 80 gallon hot water heater and an electric dryer. If I do not use the geo thermal heat pump what size generator will I need to run the house? I was thinking I could get away with a 12k generator.
Barry Heintz 
from Michigan 
June 27, 2016
Answer
In regards to your question, 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. A certified electrician needs to be consulted for proper sizing and installation of any generator. When analyzing the electrical load, consult the manufacturer’s nameplate on each major appliance or piece of equipment to determine its starting requirements in terms of amps and voltage which can be calculated to watts using Ohms Law (Amps x Volts = Watts). 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. Note: Applications that are commercial, all-electric homes, have heat pump systems or geothermal systems require special installation procedures and a certified electrician must be contacted to evaluate and install these types of systems.
+−
Is the transfer switch pre-wired?
Anthony Perella 
from Virginia 
July 12, 2014
Answer
The whole house switches are not prewired.
+−
Why does the B&S 20kw recommend changing the oil every 20 hours?
Eric 
from Maine 
January 04, 2014
Answer
Per the owner's manual here is the oil maintenance schedule...

FIRST 5 HOURS:
-CHANGE ENGINE OIL
EVERY 8 HOURS OR DAILY:
-CHECK ENGINE OIL LEVEL
EVERY 100 HOURS OR ANNUALLY:
-CHANGE ENGINE OIL AND FILTER

The "Every 8 Hours or Daily" list is during long run times. When the units run their weekly exercise they only run for 12-15 minutes, so the oil does not need to be checked or changed unless the 100 hour or annual mark comes up.

The generators internal controller will tell you when the oil needs to be changed. However, we like to recommend checking the oil every spring and fall and change as needed.
+−
How many BTU is 20 kw generator?
Mladen Kovatchev 
from New York 
June 26, 2013
Answer
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 flow rates may vary depending on these factors.

Full Load - 260,000 BTU/HR
1/2 Load - 187,000 BTU/HR

Information provided is from the manufacturers specification sheet available on our website under the specs tab....

Spec Sheet
+−
I have model 40346 standby generator what battery should i buy for it?
Michael Ditporo 
from New York 
February 08, 2013
Answer
The Briggs & Stratton 20kW Home Standby model 40346 requires a Group 26R with a minimum of 525 CCA (Cold Crank Amps).
+−
Where does unit exhaust? How close can be plced from house? Will exhaust be so hot as to cause any problems close to home? Where does aair enter and leave?
Kerry Woodroof 
from Virginia 
February 05, 2013
Answer
The new style Briggs standby generators exhaust out the front and the intake is on the rear of the unit.

You can review the installation location on the install drawing available on the site under the specs tab....

Installation Drawing
+−
wanted for my 200 amp service: LP/gasoline bi-fuel quiet whole house
Mike Bilello 
from New York 
December 05, 2012
Answer
Sorry, there are no LP/Gasoline home standby generators available. The only option would be one of the Winco Tri-Fuel portable generators which operate on NG, LP or Gasoline....

Portable Tri-Fuel Generators
Recommended Accessories
+−
Expert Recommended Accessories Hand Picked By Our Expert Jared
icon-social-fb1
Required Accessories Add All Required
Optional Accessories
How-To Articles
+−
Manuals
+−
 
 
×
Briggs & Stratton 20kW Standby Generator System (Steel) (200A Service Disconnect + AC Shedding)
Briggs & Stratton 40346
+
–
↻Reset View
Briggs & Stratton 40346
Briggs & Stratton 40346
Briggs & Stratton 40346
Briggs & Stratton 40346
Briggs & Stratton 40346
Briggs & Stratton 40346
Briggs & Stratton 40346
×
Customer Review Images

ABOUT US
+−
COMMUNITY
+−
CUSTOMER SERVICE
+−
DISCOUNT DEN
+−
PARTNERSHIPS
+−
PRODUCT SUPPORT
+−
Experts
Better Business Bureau Internet Retailer Inc 5000
CALL TO ORDER
1 (800) 800-3317
Hide
Visit Electric Generators Direct on Facebook
View the Electric Generators Direct Twitter Profile Page
Follow Electric Generators Direct on Pinterest
View Electric Generators Direct YouTube Channel