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Guardian 20 kW – Three-Phase

Model 7077 Manufacturer

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 are engineered in the USA*
Generac’s G-Force Engines are a 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 Generac headquarters in Wisconsin to answer any questions you might have.
Electrostatically applied textured epoxy paint for added durabilty helps make the sturdy, aluminum 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 and maintenance logs making it easier to manage your generator.
Built-In Mobile Link Remote Monitoring. Allows you to monitor the status of your generator from anywhere in the world using a smartphone, tablet, or PC, for FREE. Easily access information, such as the current operating status and maintenance alerts. Connect your account to your authorized service dealer for fast, friendly and proactive service. With Mobile Link, you are taken care of before the next power outage.
*Built in the USA using domestic and foreign parts.
Unit is pictured with the Generac Fascia Base Wrap p/n 7027, sold separately.

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Model 70771
Manufacturer Generac Power Systems
Made In USA Yes
Rated Watts 20kW LP/17kW NG
Rated Amps 69 LP/59 NG
Voltage 120/208V Three Phase
Enclosure Aluminum
UL Listed Yes
Type Standby Generator
Starting System Automatic Start
Low Oil Alert Yes
Hour Meter Yes
Battery Requirements Group 26R, 12V, 540 CCA Min, Not Included
Mounting Pad Composite Base Attached
Weight 466 lbs
Dimensions 48L x 25W x 29H
Engine Brand Generac G-Force 1000 Series
Engine Size 999 cc
Engine RPM 3600
Cast Iron Sleeve Yes
Cooling System Air Cooled
Frequency 60 Hz
Auto Voltage Regulation Yes
Type Natural Gas (NG)/Propane (LP)
NG Power Capacity 17kW
LP Power Capacity 20kW
NG Consumption Full Load 307 cu.ft/hr
NG Consumption Half Load 219 cu.ft/hr
LP Consumption Full Load 3.56 gal/hr
LP Consumption Half Load 2.39 gal/hr
Transfer Switch
Model Sold Separately
Warranty Information
Consumer Warranty 5 Year Limited Warranty
Shipping Information
Shipping Dimensions 45H X 28W X 51D
Shipping Weight 525 lbs



Spec Sheet

5 Year Limited Warranty

5 Year Extended Warranty

7 Year Extended Warranty

10 Year Extended Warranty


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