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Item#: 9SIA10Z14G5306

40484 20kW Automatic Standby Home Generator with 150 Amp Symphony II Whole House (SED) Transfer Switch

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  • Stop worrying about losing power in your home with the Briggs & Stratton 40484 20kW Automatic Standby Home Generator with 150 Amp Symphony II Whole House (SED) Transfer Switch. It seamlessly provides backup power to your home within seconds of a power outage with fully automatic operation and a permanent connection to natural gas or propane for years of reliable whole house standby protection. A superior design means half the size, half the sound, half the fuel consumption, and half the price of most competitive systems while providing quality and peace of mind. Lights, TVs, a washer, a dryer and even two 5 Ton AC units are easily and automatically powered by a dependable commercial-grade Vanguard engine and the new, patented Symphony II Power Management technology.

  • 20kW Automatic Standby Home Generator - 40336
  • Fully automatic, the system detects utility power and automatically starts the generator
  • Briggs & Stratton standby generators are powered by commercial-grade Vanguard engines that are design-engineered to dependably take on the most demanding jobs
  • Manages up to two load-dependent 5 Ton air conditioners
  • Managed Whole House Power system powers your household appliances plus up to 2 air conditioners
  • Thoroughly tested against National Fire Protection Standards, the 20kW standby generator has a thermally protected fuel system which automatically shuts off the unit in the event of a fire
  • Featuring unique airflow technology, the standby generator's design pushes engine exhaust out the front of the unit and directly away from the house
  • Flexible, indoor or outdoor, the transfer switch placement makes it convenient to install. All of our weather-resistant transfer switches are NEMA 3R rated for maximum protection against dirt, rain, sleet and snow
  • Rust-resistant, Galvanized steel enclosures are made from the same materials and paint process used in the automotive industry, resulting in years of protection against chips and abrasions
  • All-steel enclosure and base endure temperatures more than double that of aluminum and far beyond that of plastic
  • 150 Amp Symphony II Whole House (SED) Transfer Switch - 71070
  • Symphony II Power Management allows you to select up to 8 high-wattage appliances and manages the distribution of power from the generator to those appliances automatically
  • Wired into your home’s existing wiring, it monitors your home’s electrical circuits, so you save even more on the cost of installation
  • Load management ensures the generator won’t overload so your family can continue with its daily routine uninterrupted
  • Measures 7 in. x 16.0 in. x 30 in. and weights 58 lbs.

  • 20kW Automatic Standby Home Generator - 40336
  • 150 Amp Symphony II Whole House (SED) Transfer Switch - 71070
  • Battery Charger
  • Hour Meter

  • Length: 47 in.
  • Width: 29 in.
  • Height: 31 in.
  • Weight: 500 lbs.
  • Alternator Type: Brushed
  • Amperage (LP Vapor): 83.3
  • Amperage (Natural Gas): 75
  • CARB Compliant: Yes
  • Cooling System: Air
  • Enclosure Type: Steel
  • Engine Displacement: 993cc
  • Engine Make: Briggs & Stratton
  • Engine Model: Vanguard V-Twin
  • Engine Speed (RPM): 3600
  • Fuel Consumption at 100% Load (LP Vapor): 3.75 gal/hr.
  • Fuel Consumption at 100% Load (Natural Gas): 260 cubic ft/hr.
  • Fuel Consumption at 50% Load (LP Vapor): 2.31 gal/hr.
  • Fuel Consumption at 50% Load (Natural Gas): 187 cubic ft/hr.
  • Fuel Type: Propane (LP Vapor) / Natural Gas
  • Horsepower:
  • Motor Phase: 1
  • Noise Rating (dBA):
  • Rated Watts (LP Vapor): 20000
  • Rated Watts (Natural Gas): 18000
  • Transfer Switch Amperage: 150

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