Synergy Home Standby Generator
Premium whole-house backup power with patented G-Flex™ variable speed technology that matches engine speed to electrical demand.
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Features & Benefits

Up to whole house protection with the 200-amp, NEMA 3R (aluminum outdoor enclosure) smart switch.
Unlike competitive units that run at a constant speed, patented G-Flex technology allows the Generac Synergy to run at lower speeds when household electrical demand is light. That means significantly quieter operation at normal capacity, less fuel consumption when you need less electricity, and cleaner power than competitive air-cooled home standby generators.
Generac generators and engines are engineered and built in the USA*.
*Assembled in the USA using domestic and foreign parts
Generac’s G-Force Engine is 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 competitive engine.
Quiet-Test™ Self-Test Mode runs at a lower RPM for a five or twelve minute test, making generators significantly quieter than other brands while consuming less fuel.
Our RhinoCoat™ powder-coated finish helps make corrosion-resistant aluminum perfect for all weather conditions.
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. Click to lean more. (sold separately)
Compare
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Scroll left and right to see more of our compare table.
Synergy 20kW | Guardian 20 kW | |
---|---|---|
Voltage |
240V (Single Phase) |
|
Amps @ 240V LPG |
83.3 |
83.33 |
Amps @ 240V NG |
75 |
75 |
Engine / Alternator RPM |
2400-3600 |
3600 |
Engine |
Generac G-Force |
|
Engine Displacement |
999cc |
999cc |
Fuel Consumption @ Full Load NG cu. ft/hr |
285 |
301 |
Fuel Consumption @ Full Load LPG cu. ft/hr (gal/hr) |
123.7 (3.4) |
140 (3.87) |
Quiet-Test Mode |
Yes |
Yes |
db(A) @ Normal Operating Load |
63 |
66 |
Dimensions (L” x W” x H”) |
48 x 25 x 29 |
|
Weight |
451 |
448 |
.
Helpful Resources
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Compare
.
Synergy 20kW | Guardian 20 kW | |
---|---|---|
Voltage |
240V (Single Phase) |
|
Amps @ 240V LPG |
83.3 |
83.33 |
Amps @ 240V NG |
75 |
75 |
Engine / Alternator RPM |
2400-3600 |
3600 |
Engine |
Generac G-Force |
|
Engine Displacement |
999cc |
999cc |
Fuel Consumption @ Full Load NG cu. ft/hr |
285 |
301 |
Fuel Consumption @ Full Load LPG cu. ft/hr (gal/hr) |
123.7 (3.4) |
140 (3.87) |
Quiet-Test Mode |
Yes |
Yes |
db(A) @ Normal Operating Load |
63 |
66 |
Dimensions (L” x W” x H”) |
48 x 25 x 29 |
|
Weight |
451 |
448 |
Helpful Resources
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How Does a Home Backup Generator Work?
It starts and stops automatically, and never needs refueling. This video explains how and why.
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Why Choose a Generac Home Standby Generator?
Learn about the product innovations that make Generac home standby generators the choice for 7 out of 10 homeowners.
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How Can You Take Control of Your Power?
Our lives depend on power more and more every day. Learn how to take control of your power and never be left in the dark again.