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Champion 12.5-kW Home Standby Generator with 100-Amp Outdoor-Rated Automatic Transfer Switch
Delivery & Support
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BrandNewEngines, Inc - Non-returnable. Transportation of this item is subject to hazardous materials regulation
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- This item is non-returnable because of transportation regulation, but if the item arrives damaged or defective, you may request a refund or replacement through Your Orders by providing an image of the item and its defects.
Our specialist Customer Support for large items dispatched from Amazon is on hand to help with your order. Contact us via phone or chat 7 days a week.
Purchase options and add-ons
Brand | Champion Power Equipment |
Wattage | 12500 watts |
Fuel Type | Propane (LPG), Natural Gas (NG) |
Power Source | Fuel Powered |
Recommended Uses For Product | Residential |
Item Weight | 455.5 Pounds |
Voltage | 120 Volts |
Output Wattage | 12.5 |
Special Feature | Fully Enclosed Design |
Included Components | Champion Power Equipment #100179 12,500 Watt (LPG) Home Standby Generator with Transfer Switch (NEMA3) See more |
About this item
- Totally Automatic – The ATS100 Emergency Essentials Automatic Transfer Switch has 12 available circuits 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 63 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 12.5-kilowatt generator provides 12,500 watts of continuous power on propane and 11,000 watts on natural gas, with no refueling, no manual operation and no extension cords needed
- Champion Support – Includes 10-year limited warranty with FREE lifetime technical support from dedicated experts
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From the brand

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Champion Power Equipment is a market leader in power generation equipment. Champion has years of experience providing dependable and durable power products designed and engineered in the US for the North American and world markets.
For home, work or play, Champion products are the standard of performance excellence.
We make the power that makes your life easier.
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From the manufacturer



About Champion
Champion Power Equipment is a market leader in power generation equipment. Champion has years of experience providing dependable and durable power products designed and engineered in the US for the North American and world markets. For home, work or play, Champion products are the standard of performance excellence. We make the power that makes your life easier.
Champion 12.5-kW Home Standby Generator with 100-Amp Outdoor-Rated Automatic Transfer Switch
Champion’s 12.5-kW Home Standby Generator system provides 24/7 power for your home and peace of mind for you. This fully automatic unit is the quietest-in-class and never needs refueling. Designed to operate in sub-zero temperatures or extreme heat.
- Protection: Automatic 24/7 operation
- Fuel: Propane (LPG) or Natural gas (NG) for continuous operation
- Convenience: Auto start in the event of utility power failure. Automatic weekly exercise and test function to insure the unit is always ready to perform
- Quiet Operation: Designed for residential installations
- Innovative: 'Gullwing' enclosure permits easy installation and service
- Reliable: 24V system for best in class starting

Champion Home Standby units:
- 12.5-kilowatt generator provides 12,500 watts of continuous power on propane and 11,000 watts on natural gas
- 717cc Champion OHV engine, auto start and low oil shutdown
- Champion Auto Control Module (ACM)
- All weather composite mounting pad
- All weather steel enclosure
- Propane (LPG) or natural gas (NG) operation
- Battery tender to ensure fully charged batteries
- First class customer support
We make the power that makes your life easier
24/7 Power
For your home
For your peace of mind
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Champion 8.5-kW Home Standby with 50-Amp Indoor-Rated Automatic Transfer Switch
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Champion 12.5-kW Home Standby w/ 100-Amp Indoor-Rated Automatic Transfer Switch
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Champion 8.5-kW Home Standby with 50-Amp Outdoor-Rated Automatic Transfer Switch
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Champion 12.5-kW Home Standby w/ 100-Amp Outdoor-Rated Automatic Transfer Switch
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Customer Reviews |
3.8 out of 5 stars 15
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4.5 out of 5 stars 7
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4.4 out of 5 stars 55
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4.4 out of 5 stars 55
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Price | — no data | — no data | $3,249.00$3,249.00 | $4,199.00$4,199.00 |
Engine Size (cc) | 439 | 717 | 439 | 717 |
Engine Type | 4-stroke | 4-stroke V-twin | 4-stroke | 4-stroke V-twin |
Starting System | Automatic 24V | Automatic 24V | Automatic 24V | Automatic 24V |
Fuel Type | Natural Gas (NG), Propane (LPG) | Natural Gas (NG), Propane (LPG) | Natural Gas (NG), Propane (LPG) | Natural Gas (NG), Propane (LPG) |
Operational Volume (dBA) | 59.5 | 63.0 | 59.5 | 63.0 |
AC Ton Rating (T) | 3 | 4 | 3 | 4 |
Transfer Switch | ✓ | ✓ | ✓ | ✓ |
Switch Amps (A) | 50 | 100 | 50 | 100 |
Switch Volts (V) | 120/240 | 120/240 | 120/240 | 120/240 |
Switch Enclosure | NEMA 1 | NEMA 1 | NEMA 3R | NEMA 3R |
Videos
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Champion 12.5-kW Home Standby Generator with 100-Amp Outdoor-Rated Automatic Transfer SwitchChampion Power Equipment
Product information
Brand | Champion Power Equipment |
---|---|
Wattage | 12500 watts |
Fuel Type | Propane (LPG), Natural Gas (NG) |
Power Source | Fuel Powered |
Recommended Uses For Product | Residential |
Item Weight | 455.5 Pounds |
Voltage | 120 Volts |
Output Wattage | 12.5 |
Special Feature | Fully Enclosed Design |
Included Components | Champion Power Equipment #100179 12,500 Watt (LPG) Home Standby Generator with Transfer Switch (NEMA3) |
Color | White, Black |
Product Dimensions | 50"L x 30.1"W x 40.2"H |
Model Name | 100179 |
Engine Type | 4-stroke V-Twin |
Ignition System Type | Automatic 24-volt |
Tank Volume | 5 Gallons |
Engine Displacement | 717 Cubic Centimeters |
Runtime | 1 hour |
Total Power Outlets | 16 |
Frequency | 60 Hz |
Engine Power Maximum | 12.5 Kilowatts |
Starting Wattage | 1.25E+4 Watts |
Running Wattage | 12500 Watts |
UPC | 896682000298 |
Manufacturer | Champion Power Equipment |
Item Weight | 456 pounds |
ASIN | B01A0TL9NC |
Item model number | 100179 |
Customer Reviews |
4.4 out of 5 stars |
Best Sellers Rank | #422,424 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #1,351 in Outdoor Generators |
Is Discontinued By Manufacturer | No |
Warranty & Support
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Champion 12.5-kW Home Standby Generator with 100-Amp Outdoor-Rated Automatic Transfer Switch
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Product Description
The Champion Power Equipment 100179 12.5-kW Home Standby Generator with an ATS100 Outdoor-Rated Automatic Transfer Switch is The Simple Solution to a power outage. It starts automatically when the power goes out and returns to standby when power is restored. 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. The ATS100 automatic transfer switch operates a 100 amp, 16 circuit load (12 space sub panel allows up to 4 tandem breakers). 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 3R rated enclosure 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. This 12.5-kW-rated unit produces 52.1 amps at 240 volts on propane and 45.8 amps at 240 volts on natural gas. 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 ATS100 is UL and cUL listed in the US and Canada. Champion Support and our nationwide network of service centers will back your purchase up with a 10-year limited warranty and free lifetime technical support.
Top Brand: Champion Power Equipment
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This Item Champion Power Equipment Champion 12.5-kW Home Standby Generator with 100-Amp Outdoor-Rated Automatic Transfer Switch | Recommendations | |||||
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Price | $4,199.00$4,199.00 | $3,875.00$3,875.00 | $2,334.10$2,334.10 | -25% $2,999.99$2,999.99 List: $3,999.00 | $2,399.99$2,399.99 | -15% $1,398.99$1,398.99 List: $1,649.00 |
Delivery | Get it May 8 - 13 | Get it May 22 - 28 | Get it Thursday, May 8 | Get it May 21 - 22 | Get it May 19 - 20 | Get it Saturday, May 3 |
Customer Ratings | ||||||
Sold By | BrandNewEngines, Inc | C&E Electric Supply House | Amazon.com | Prime Las Vegas | Prime Las Vegas | Amazon.com |
fuel type | Propane (LPG), Natural Gas (NG) | Propane (LPG), Natural Gas (NG) | Gasoline | Gasoline | Gasoline, Propane, Natural Gas | Gasoline, Propane, Natural Gas |
power source | Battery Powered | natural gas | Fuel Powered | Fuel Powered | Natural Gas | Natural Gas |
engine type | 4-stroke V-Twin | 4 Stroke | 4 Stroke | 4 Stroke | 4 Stroke | 4 Stroke |
runtime | 1.92 hours | — | 9 hours | 11 hours | 3.5 hours | 12 hours |
tank volume | 5 gallons | — | 11 gallons | 17 gallons | 11 gallons | 4.32 gallons |
power outlets | — | 10 | 5 | 10 | 5 | 6 |
wattage | 12500 watts | 12500 watts | 12000 watts | 28000 watts | 12000 watts | 9000 watts |
voltage | 120 volts | 120 volts | 120 volts | 240 volts | — | 120 volts |
engine displacement | 717 cubic centimeters | 439 cubic centimeters | 717 cubic centimeters | 999 cubic centimeters | 717 cubic centimeters | 420 cubic centimeters |
ignition system type | Automatic 24-volt | Electronic | Manual Recoil | electric start | electric start | electric start |
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the generator's installation straightforward and appreciate its well-made construction and power generation capabilities. They consider it excellent value for money. However, the functionality receives mixed reviews, with some saying it works perfectly while others report it doesn't work at all.
AI-generated from the text of customer reviews
Select to learn more
Customers find the generator's installation straightforward.
"...I received it within a week of ordering. The installation was fairly straightforward...." Read more
"This a well-made piece of equipthat . I was not super hard to install. I would highly recommend it." Read more
"It showed up on time and was easy to install. Easy to read installation guide. it fired right up." Read more
"Installed a month ago without a hitch. Had 1st power outage yesterday and unit worked perfectly. So grateful." Read more
Customers find the generator well-made.
"This a well-made piece of equipthat . I was not super hard to install. I would highly recommend it." Read more
"Well constructed easy access weather proof cabinet. Quiet operation, easy wiring and set up" Read more
"Excellent Value, Quality Craftsmanship, Easy Installation..." Read more
Customers find the generator to be an excellent value.
"price,customer service excellent for any questions .I had a licensed electrician install unit...." Read more
"Excellent Value, Quality Craftsmanship, Easy Installation..." Read more
"Excellent Seller..." Read more
Customers have mixed experiences with the generator's functionality, with some reporting it works perfectly while others say it doesn't work at all.
"...Had a few short power outages is worked like a charm,No service contract required." Read more
"...It does not work. There's both a gas leak and an electrical problem...." Read more
"...The unit does look and function well." Read more
"...ATS switch does not work and fuses blow out easy not to mention they are hard to get to or should I say impossible." Read more
Reviews with images

Off-Grid Champion 12.5 LPG
Top reviews from the United States
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- Reviewed in the United States on March 14, 2023Style: 12.5-kW and 100A ATSVerified PurchaseI was impressed enough with the reviews and videos out the on this unit to proceed with purchasing one for my home and I'm glad I did. I received it within a week of ordering. The installation was fairly straightforward. I had a 250 gallon LPG tank installed to serve the HSB Generator. The 100A ATS allows for the entire internal house panel to be served during an outage so everything in the home with the exception of the HVAC, Range, and Dryer circuits. All other appliances, circuits and water heater are served by the unit. The 12.5kW unit is more than sufficient to serve all of this because with LPG the unit can serve up to 52A of load. You do have to purchase (2) 12V batteries separately and install oil in the unit before running it as it ships without batteries or oil. A concrete pad is not absolutely necessary if you have a flat compacted location for the unit. Rock would be recommended if you don't pour a pad. I would highly recommend this unit to anyone looking to install a HSB generator. It automatically starts and restores power in under a minute during an outage.
5.0 out of 5 starsI was impressed enough with the reviews and videos out the on this unit to proceed with purchasing one for my home and I'm glad I did. I received it within a week of ordering. The installation was fairly straightforward. I had a 250 gallon LPG tank installed to serve the HSB Generator. The 100A ATS allows for the entire internal house panel to be served during an outage so everything in the home with the exception of the HVAC, Range, and Dryer circuits. All other appliances, circuits and water heater are served by the unit. The 12.5kW unit is more than sufficient to serve all of this because with LPG the unit can serve up to 52A of load. You do have to purchase (2) 12V batteries separately and install oil in the unit before running it as it ships without batteries or oil. A concrete pad is not absolutely necessary if you have a flat compacted location for the unit. Rock would be recommended if you don't pour a pad. I would highly recommend this unit to anyone looking to install a HSB generator. It automatically starts and restores power in under a minute during an outage.Excellent Value, Quality Craftsmanship, Easy Installation
Reviewed in the United States on March 14, 2023
Images in this review
- Reviewed in the United States on January 9, 2025Style: 12.5-kW and 100A ATSVerified PurchaseI've had my generator for about 4 years and haven't had a problem until recently. Evidently the starter has gone out. I called Champion customer support and they were very helpful and are sending the part.
I'm very impressed by their concern for their customers!
- Reviewed in the United States on December 27, 2024Style: 12.5-kW and 100A ATSVerified PurchaseGot this Gen after careful research about Whole Home Gens. It is overkill for my Off-Grid application, but I wanted the extra capacity for future expansion plans & to run heavy 240 V equipment when needed. Champion provides Inverter/Two Wire Dry Contact info so it will be automated for start/stop battery charging with commands from my systems ChargeVerter…
5.0 out of 5 starsGot this Gen after careful research about Whole Home Gens. It is overkill for my Off-Grid application, but I wanted the extra capacity for future expansion plans & to run heavy 240 V equipment when needed. Champion provides Inverter/Two Wire Dry Contact info so it will be automated for start/stop battery charging with commands from my systems ChargeVerter…Off-Grid Champion 12.5 LPG
Reviewed in the United States on December 27, 2024
Images in this review
- Reviewed in the United States on September 16, 2022Style: 12.5-kW and 100A ATSVerified PurchaseDo not buy a generator this way. Buy one only from someone who is responsible for installing it.
I bought this generator, thinking the general contractor we were using for an addition could get it installed. Not so. The plumber and electrician had never seen one before and were not interested in learning. It does not work. There's both a gas leak and an electrical problem.
I cannot find anyone locally (San Antonio, Texas, a city of well over 1,000,000 people) who will return my calls, much less fix it. I contacted Champion, and they have not responded so far.
So far for me this has been an expensive boondoggle.
- Reviewed in the United States on February 9, 2024Style: 8.5-kW and 50A ATSVerified Purchaseprice,customer service excellent for any questions .I had a licensed electrician install unit.Had a few short power outages is worked like a charm,No service contract required.
- Reviewed in the United States on May 4, 2022Style: 12.5-kW and 100A ATSVerified PurchaseThis a well-made piece of equipthat . I was not super hard to install. I would highly recommend it.
- Reviewed in the United States on December 30, 2023Style: 12.5-kW and 100A ATSVerified PurchaseExcellent Seller, Great Communication, Package Well, Just as Described, Would Buy from Again!!! Generator is very well designed. Even has a back enamel oil collector pan make oil change very clean and simple. They thought of the end user all the way through.
- Reviewed in the United States on September 15, 2022Style: 12.5-kW and 100A ATSVerified PurchaseI installed the unit myself and had some issues that the company did correct. There is an internal switch which absolutely needs to be in the correct position for the correct transfer switch installation. If you are going to install one yourself, and you have questions, don't expect the answers right away on the phone. Leave your number and they generally will get back to you sometime that day. The unit does look and function well.