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2019 Generac Guardian 3-Phase 20kW Automatic Model #7077


Guardian 3-Phase 20kW Automatic Model #7077



One of the most powerful air-cooled generators on the market today, the Guardian Series 3-Phase 20 kW Standby Generator can provide whole-house backup power for many homes.

  • 5 Year Limited Warranty for automatic standby generators.
  • True Power™ Technology delivers best-in-class power quality with less than 5 percent total harmonic distortion for clean, smooth operation of sensitive electronics and appliances.
  • Generac generators and engines are engineered and built in the USA*. *Built in the USA using domestic and foreign parts
  • Generac's G-Force Engine are purpose built, pressure-lubricated engine capable of handling the rigors of generator use, resulting in power that's more reliable and requires less routine maintenance than any other competitor.
  • 24/7/365 Customer Support Team standing by all day, every day from our headquarters in Wisconsin to answer any questions you might have.
  • Durable powder-coat finish helps make the sturdy, galvanneal steel enclosure perfect for all weather conditions
  • Smart, User-Friendly Controls Generac’s Evolution™ Controller features a dual-line, multilingual LCD display allowing for easy monitoring of history, maintenance logs making it easier to manage your generator.
  • Mobile Link™ Remote Monitoring allows you to monitor the status of your generator from anywhere in the world using a smartphone, tablet, or PC. Easily access information, such as the current operating status and the generator’s maintenance schedule. Connect your account to your authorized service dealer for fast, friendly and convenient assistance. (sold separately)
  • Rated Maximum Continuous Power Capacity (LP): 20,000 Watts*
  • Rated Maximum Continuous Power Capacity (NG): 17,000 Watts*
  • Rated Voltage: 208
  • Rated Maximum Continuous Load Current – 208 Volts (LP/NG): 69.4/59.0
  • Total Harmonic Distortion: Less than 5%
  • Main Line Circuit Breaker: 80 Amp
  • Phase: 3
  • Number of Rotor Poles: 2
  • Rated AC Frequency: 60 Hz
  • Power Factor: .8
  • Battery Requirement (not included): Group 26R, 12 Volts and 540 CCA Minimum or Group 35AGM, 650 CCA Minimum
  • Unit Weight (lb/kg): 466/211
  • Dimensions (L x W x H) in/mm: 48 x 25 x 29/1218 x 638 x 732
  • Sound output in dB(A) at 23 ft (7 m) with generator operating at normal load**: 67
  • Sound output in dB(A) at 23 ft (7 m) with generator in Quiet-Test™ low-speed exercise mode**: 58
  • Exercise Duration: 5 min.
  • Type of Engine: GENERAC G-Force 1000 Series
  • Number of Cylinders: 2
  • Displacement: 999 cc
  • Cylinder Block: Aluminum w/Cast Iron Sleeve
  • Valve Arrangement: Overhead Valve
  • Ignition System: Solid-state w/Magneto
  • Governor System: Electronic
  • Compression Ratio: 9.5:1
  • Starter: 12 Vdc
  • Oil Capacity Including Filter: Approx. 1.9 qt./1.8 L
  • Operating rpm: 3,600
  • Fuel Consumption: Natural Gas ft³/hr (m³/hr) 1/2 Load: 219 (6.20)
  • Fuel Consumption: Natural Gas ft³/hr (m³/hr) Full Load: 307 (8.69)
  • Fuel Consumption: Liquid Propane ft3/hr (gal/hr) [l/hr] 1/2 Load: 87 (2.39) [9.03]
  • Fuel Consumption: Liquid Propane ft3/hr (gal/hr) [l/hr] Full Load: 130 (3.56) [13.48]
Fuel pipe must be sized for full load. Required fuel pressure to generator fuel inlet at all load ranges - 3.5-7" water column (7-13 mm mercury) for natural gas, 10-12" water column (19-22 mm mercury) for LP gas. For Btu content, multiply ft³/hr x 2500 (LP) or ft³/hr x 1000 (NG). For Megajoule content, multiply m³/hr x 93.15 (LP) or m³/hr x 37.26 (NG). **Sound levels are taken from the front of the generator. Sound levels taken from other sides of the generator may be higher depending on installation parameters. Rating definitions - Standby: Applicable for supplying emergency power for the duration of the utility power outage. No overload capability is available for this rating. (All ratings in accordance with BS5514, ISO3046 and DIN6271). * Maximum wattage and current are subject to and limited by such factors as fuel Btu/megajoule content, ambient temperature, altitude, engine power and condition, etc. Maximum power decreases about 3.5 percent for each 1,000 feet (304.8 meters) above sea level; and also will decrease about 1 percent for each 6 °C (10 °F) above 16 °C (60 °F).



Engine Type
GENERAC G-Force 1000 Series


48 in. (1218 mm)
25 in. (638 mm)
29 in. (732 mm)
466 lb. (211 kg)


AC Output
LP: 20,000 Watts; Natural Gas: 17,000 Watts
Noise Level
67 dB(A); Quiet-Test™: 58 dB(A)

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