Loading... Please wait...

Buy this Generator Online Today

Model # 40510
MSRP: $2,499.00
You Save: $300.00


Leaves Factory In 1-2 Days

Login to Norwall
Add To Compare  |  Add to Wish List
Whoa! No review on this Product

Be the first to review this product and earn a chance for a $10 store credit when you place a review on this product post purchase.

8kW Essential Power Home Generator NG/LP and PreWired 50 Amp 10 Circuit ATS by Briggs and Stratton | 40510

  • Reliable Engine Power - Commercial Grade Vanguard Engines
  • The compact 8kw - 10kW standby generators have the highest power outputs per square inch of footprint in its kW class
  • Includes Pre-Wired 50 Amp 10 Circuit Automatic Transfer Switch
  • Rust-resistant, Galvanneal steel enclosures
  • Automatically powers your home in seconds after sensing a power outage
  • Thermally protected fuel system which automatically shuts off the unit in the event of a fire
  • Friendly control panel makes repairs easier and less costly for homeowners
  • Can easily be moved to the installation location with a two-wheeled dolly
  • Manufactures Warranty: 4 Year Parts, 3 Years Labor


Briggs and Stratton 40510 Details and Specifications

The Briggs and Stratton 8kW standby generator with the only pre-wired whip and transfer switch for indoor & outdoor placement, automatically keep your home powered up during unexpected power outages, even if you are not home. When an outage occurs, the generator starts and the 50 amp, 10-position automatic transfer switch selects generator power―all within just a few seconds―to keep the essential electrical loads that keep your home safe, secure, and comfortable operating with minimal interruption.

Placement & Safety

With a front-facing exhaust and full compliance with NFPA 37 (National Fire Protection Association) placement of internal combustion engines, these standby generators have more placement options than similarly priced and sized generators. The thermally activated, automatic fuel shutoff valve and non-combustible, all steel cabinet and base with the smallest footprint its power class make these standby generators safe for installations as close as 18 inches to the home―perfect for small yards, tight lot lines, and inconspicuous placement.


The 8 kilowatt standby generators feature a new Briggs & Stratton 500cc OHV engine designed specifically for long-term reliability and performance. When the power goes out, you can be sure the generator will start, run, and keep running until utility power is restored. Simple access to the engine makes routine maintenance easy and convenient for oil, filter, and spark plug changes.

Briggs & Stratton configures their generators at the factory to run on either natural gas or liquefied petroleum (LP) gas, eliminating the need to configure the generator during installation.

Automatic Transfer Switch

Eliminate wasted time trying to make a transfer switch fit due to limited placement options.  The Briggs & Stratton pre wired transfer switch can easily be mounted on either side of the circuit breaker panel.  This cuts the need for you to figure out a solution when breaker panels are not in ideal locations, saving you time and frustration.

You can customize the location of the transfer switch, able to alter the length of wiring to the generator and still be UL compliant.  The seal-tight conduit provides maximum protection against dirt, rain, sleet and snow (2' for circuit breaker panel connection and 25' for generator connection).  Able to alter the length of wiring to the generator and still be UL compliant. Saves up to 30% installation time - no need to purchase, measure and cut wire, it's all included.


At the heart of the system is the onboard controller which monitors the engine, alternator output, and safety sensors that include low oil shutdown, low frequency or voltage, engine temperature, engine status, transfer switch status, and battery condition. The controller operates the generator to maintain the output voltage at the correct frequency and level for power as clean as that from the utility―perfect for operating computers and other sensitive electronics.

Appearance and Noise

The 8kW standby generator from Briggs & Stratton isn't much louder than a five-ton central air conditioner. Sitting on its base, the generator is 35 inches high, 28 inches wide and 24.4 inches deep, giving it the smallest footprint in its power class. The case is made from Gavanneal steel―the same steel used by the automotive industry―for a long lasting, chip and rust-resistant finish that performs well even in a coastal climate to keep the generator looking good for years to come.

Optional Accessories

Cold-weather kits that include a battery warmer and two oil heaters ensure the generator will start, even in cold weather. The battery warmers are thermostatically controlled, and the kits are tested at 20 degrees below zero.

Wireless monitors install easily and eliminate going outdoors to check on the generator. The basic wireless monitor mounts anywhere indoors to keep you informed of the generator's status and operation.

Get all your maintenance supplies in kit form including oil, oil filters, air filters, and spark plugs. With a maintenance kit, you know you have the right supplies. Keep extra kits ready so you have the parts you need to keep the generator running during a long-term power outage.

Briggs & Stratton 8kW standby generators come with 4-year, limited residential warranty.

Warranty Information

Manufactures Warranty: 4 Year Parts, 3 Years Labor

Product Specifications

Model Number 40510
Manufacturer Briggs & Stratton
Made In USA Yes
Rated Watts 8kW LP/6kW NG
Rated Amps 33.3 LP/25 NG
Voltage 120/240V Single Phase
A/C Ton Rating 3 Ton
Enclosure Galvanneal Steel
UL Listed Yes
Decibel Rating 79 dbA @ 7 meters Full Load
Starting System Automatic Start
Low Oil Alert Yes
Hour Meter Yes
Battery Requirement 12V BCI size 26 540 CCA Not Included
Mounting Pad Composite Base Attached
Product Weight 252 lbs
Dimensions (Inches) 28L x 24.4W x 35.1H
Engine Brand B&S Vanguard
Engine Size 500 cc
Engine RPM 3600
Cooling System Air Cooled
Alternator Type Brushed
Frequency 60 Hz
Auto Voltage Regulation Yes
Fuel Type Natural Gas (NG) / Propane (LP)
NG Power Capacity 6kW
LP Power Capacity 8kW
NG Consumption @ Full Load 121 cu.ft/hr
NG Consumption @ 1/2 Load 94 cu.ft/hr
LP Consumption @ Full Load 1.57 gal/hr
LP Consumption @ 1/2 Load 1.04 gal/hr
Transfer Switch
Transfer Switch Model Nema 3R - Indoor/Outdoor Rated
Transfer Switch Amps 50 Amps
Transfer Switch Circuits 10 Pre Wired Circuits
1-20 Amp 240V
3-20 Amp 120V
5-15 Amp 120V
ATS Poles 2 Pole
Transfer Switch Weight 30 lbs
Warranty Information
Consumer Warranty 4 Year Limited Warranty
Shipping Weight 340 lbs
Shipping Dimensions 42H x 39W x 36D
You need to be logged in to write a review.
Write A Review

Product Reviews

This product hasn't received any reviews yet. Be the first to review this product!

Recommended Products


Shipping Terms

All generators include 24 hour delivery notification and residential delivery. Liftgate service is available on all air-cooled generators and some liquid cooled units – Please call for verification. Free Shipping is curbside service only. Curbside service means the freight company will deliver to your address and lower your generator to the ground. The freight company will not back down driveways, place a generator in a building or where it is being installed. You are responsible for arranging the movement and setting of the generator.

Some restrictions apply to "Free Shipping" you may either view our
Shipping Information page or contact us for details.