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Champion 8.5-kW Home Standby Generator with 50-Amp Outdoor Switch NEMA 3R Model #100177

NEMA 3R Rated. Compatible with all States including CA.
SKU 100177

The Champion Power Equipment 100177 8.5-kW Home Standby Generator with an ATS50 Outdoor-Rated 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 ATS50 automatic transfer switch operates a 50 amp, 12 circuit load (8 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.

The Champion 439cc OHV engine provides 8.5-kilowatts of continuous power on propane and 7.5-kilowatts on natural gas. This 8.5-kW-rated unit produces 35.4 amps at 240 volts on propane and 31.3 amps at 240 volts on natural gas.

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 59.5 dBA has about the same noise level as 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 ATS50 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 limited warranty and FREE lifetime technical support.

What's Included:

  • Oil Drain Pan
  • Flexible Fuel Line
  • HSB Enclosure Keys
  • Battery Cables & Hardware
  • LPG Jets
  • Jet Change Tool


        Totally Automatic

        The ATS50 Emergency Essentials Automatic Transfer Switch has 12 available circuits available and provides seamless power to your home during an outage


        Thanks to advanced sound dampening and a specially designed low-tone muffler, this generator operates at a residential-friendly 59.5 dBA noise level


        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


        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 limited warranty with FREE lifetime technical support from dedicated experts


          Propane Rated Watts 8500W
          Natural Gas Rated Watts 7500W
          Propane Rated Amps at 120V 70.8A
          Propane Rated Amps at 240V 35.4A
          Natural Gas Rated Amps at 120V 62.5A
          Natural Gas Rated Amps at 240V 31.3A
          Rated Volts 120/240
          Rated Frequency 60Hz
          Phase Single
          Propane Fuel Consumption at 1/2 Load 1.0  gal/h
          Propane Fuel Consumption at Full load 1.5 gal/h
          Natural Gas Fuel Consumption at 1/2 Load 97.5 ft3/h
          Natural Gas Fuel Consumption at Full Load 139.8 ft3/h
          Main Line Circuit Breaker 35.5A
          Starting System Automatic 24V
          Operational Volume 59.5 dBA
          Cooling System Air Cooled
          AC Ton Rating 3T
          Generator Enclosure Steel
          Generator Mounting Pad Composite
          Engine Brand Champion
          Engine Size 439cc
          Engine Type 4-stroke V-Twin
          Engine Speed 3600
          Fuel Type Propane (LPG), Natural Gas (NG)
          Engine Oil Type Mobil 1 5W-30 Full Synthetic
          Engine Oil Capacity 1.2 qt.
          Engine Oil Included No
          Low Oil Shut-Off Yes
          UL Listing cULus
          EPA Certified Yes
          Switch Amps 50A
          Switch Volts 120/240
          Switch Type Emergency Essential
          Switch Circuits 12
          Switch Poles 2
          Load Management No
          Service Entry Rated No
          Switch Enclosure NEMA 3R


          Length 50.0 in.
          Width 30.1 in.
          Height 40.2 in.
          Weight 394.1 lb.


          Operator's Manual

          HSB Installation Manual (all models)

          Home Standby Fact Sheet

          Customer Reviews

          Based on 2 reviews
          Can't beat Champion
          Quiet and very effective

          Customer Reviews

          Based on 2 reviews
          Can't beat Champion
          Quiet and very effective