Page last updated Jan 26, 2022 @ 01:18pm

(100174, 100177 bundled with 50A switch)

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Standby Generator Set
Champion Power Equipment Air Cooled
8.5kW on vapor propane or 7.5kW on nat. gas
120/240V single phase

Great price for entry level automatic standby generator
that will power essential household circuits

Larger 12.5kW and 14.0kW ratings also available

(click kW above)



The Champion Power Equipment 8.5-kW Home Standby Generator with an Automatic Transfer Switch is The Simple Solution™ to a power outage. Enjoy peace of mind while ensuring security and convenience for your family during an emergency.

The generator starts automatically when the power goes out and returns to standby when power is restored. The 24-volt starting system operates in temperatures ranging from -22°F to 104°F with no warming kit necessary.

You’ll have the starting power you need during an emergency since the onboard battery charger maintains the charge at all times, plus, since the generator is connected to your propane or natural gas system, it never needs refueling. This unit also performs weekly self-diagnostic tests.

An all-weather, composite mounting pad is included for easy installation, plus the steel enclosure protects your generator from the elements. The automatic transfer switch is installed as a sub-panel with a fixed number of branch circuits connected. It is ideal for homeowners who want to power emergency essentials during a power outage as opposed to the whole house. It is housed in a NEMA 1 rated enclosure for indoor or NEMA 3R for outdoor use.

Our innovative gull-wing design provides easy access to the engine and control panel and allows a full view of the onboard control system.

The Champion OHV engine provides continuous power on propane or natural gas. The generator is shipped from the factory ready to run on natural gas. To convert to propane fuel an orifice in the Master Mixer Assembly (carburetor system) must be changed.

The sound-dampening lining and low-tone muffler reduce noise through a unique baffle system and make this unit the quietest in its class. The residential-friendly noise level is about the same as a normal conversation.

The alternator produces less than 5% total harmonic distortion (THD) to ensure safe use with even the most sensitive electronics.

This generator is available for all 50 states, and the automatic transfer switch is UL and cUL listed in the US and Canada. Buy with confidence - Champion Support and our nationwide network of service centers will back your purchase up with a 10-year/2,000 hour limited warranty and FREE lifetime technical support. Designed and engineered in the USA. Manufactured at the Champion facility in Asia.

What’s included

Oil Drain Pan
Flexible Fuel Line
Generator Enclosure Keys
Battery Cables & Hardware (batteries must be purchased locally by installer)
LPG Jets
Jet Change Tool

  • Totally Automatic
    The ATS50 Emergency Essentials Automatic Transfer Switch has 8  circuit spaces available and provides seamless power to your home during an outage
  • Quietest-in-Class
    Thanks to advanced sound dampening and a specially designed low-tone muffler, this generator operates at a residential-friendly 59.5 dBA noise level
  • Reliable
    24-volt starting system operates in sub-zero or extreme heat (between -22°F and 104°F) with no warming kit necessary, plus the generator performs weekly self-diagnostic tests
  • Powerful
    The 8.5-kilowatt generator provides 8500 watts of continuous power on propane and 7500 watts on natural gas, with no refueling, no manual operation and no extension cords needed
  • Champion Support
    Includes 10-year/2,000 hour limited warranty with FREE lifetime technical support from dedicated experts

For complete specifications click thumbnails at top of this page


Power Rating (vapor propane/natural gas) 8.5 kW / 7.5 kW
(derate by 3.5% per 1,000 feet above sea level)
Motor Starting Capability (approx) 3 ton air conditioner
Output Voltage & Current
(vapor propane/natural gas)
120/240V ±3% single phase
60 Hz ±2%
35.4 Amps / 31.3 Amps
Sound Level 59.5 dbA at 23 ft and typical half load
Engine Type Champion
439 cc, 15 hp, overhead valve, 
aluminum block with cast iron cylinder liners
Engine and alternator speed 3600 rpm, mechanically governed
Cooling System air cooled
Alternator 2-pole, copper windings, <5% total harmonic distortion,
long life DC brushes, Class H insulation
Starting Temperature -22°F to 104°F
Enclosure steel easy access innovative gull-wing design
Dimensions 49"L x 28"D x 28"H
Fuel Pressure Requirements natural gas: 5 to 7 inches water column
vapor propane: 10 to 12 inches water column
LP Volume @ 25/50/75/100% load 0.81/1.10/1.38/1.60 gal/hour
NG Volume @ 25/50/75/100% load 95/108/123/136 cu.ft./hour
Warranty* 10 year / 2,000 hour limited


Rating 50 Amp, 120/240V, 2-pole
Service Entrance Rated? No
Demand Control Load Management? No
Branch Circuit Spaces 8 spaces
can accommodate up to 8 standard size single pole breakers or 4 standard size plus 8 piggy-back breakers
Enclosure Types NEMA 1 indoor NEMA 3R outdoor
Dimensions 4.5"D x 12.5"W x 22.5"H 5"D x 13"W x 23"H
Weight 21 lbs 29 lbs
Click thumbnail images at right to enlarge Champion-50A-ATS-N1.jpg (18095 bytes) Champion-50A-ATS-N3R.jpg (17435 bytes)

* Champion recommends using their dealers to perform maintenance and repairs but that is not always required. It is a case by case situation. If it is an easy repair and the customer is mechanically inclined Champion can send him the part and talk him through the repair without harming his warranty. Champion is pretty easy to work with in regards to warranty cases.


Notes about non-standard applications

Champion instruction manuals indicate that they do not warrant this generator for prime duty applications or off-grid solar applications. If used for these type applications there is no warranty.

Also, this generator like most other small air cooled standby generators, does not use the standard 2-wire start control. If you need automatic starting from a 2-wire control contact an additional interposing relay or contactor will be required along with the Champion automatic transfer switch. Contact us for details.


Item Number: 100199
Price: $2,595
Price last updated 1/24/2023
Shipping Weight: 418 lbs.
This item ships with free ground freight to the USA 48 states.
This item normally ships in approximately 1 week or less.

We can also ship this item to Alaska, Hawaii, and the US territories. Contact us for a shipping quote.

Part Numbers that can be ordered using the drop-down menus above on this page:
Generators: 100199
Generator/Switch Bundles: 100174, 100177
Switches: 100947, 100950
Accessories: 100372, 100895, 102002


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