8 kW
10 kW
14 kW
17 kW
20 kW
20 kW Air-Cooled Standby Generator
Our NEW 20 kW model makes whole-house protection more affordable than ever before.
With Generac's exclusive Quiet-Test™ feature, best-in-class True Power™ technology
and a standard all aluminum enclosure, the 20 kW is also a tremendous value for those
who need more power. For extra convenience, this model has a digital control panel,
external main circuit breaker, system status LED and maintenance interval LED as well
as an external GFCI outlet for outdoor power needs.
Convenient, Hands-Free Operation
No fueling. No manual start. No extension cords. Runs on natural gas or liquid propane
Clean, Smooth Power
True Power™ Technology provides safe operation of sensitive electronics
Powerful Output
Highest power output in its class
Quietest, Confident Operation
Patented Quiet-Test™ feature makes the 20 kW model as quiet
as a car at idle during the weekly self-testing cycle.
Confident Operation
Automatic weekly exercise ensures protective response
Generac OHVI Industrial Engine
The only air-cooled engine designed specifically for generators
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Long-run, long-life design: Over 3,000 hours of run time
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High-torque design: Responds instantly to large electrical loads
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Low-maintenance: 2 year, 200 hour service intervals
Ultimate Weather Protection
Ultimate Weather Protection: Aluminum enclosure for superior corrosion resistance
Base Fascia
Matching trim piece finishes off the new, cleaner design
UL Listed
For safety and certified power ratings
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Model Number
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5533
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Rated Power (LP / NG)
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20/18 kW
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Rated Amps @ 60 Hz (LPV / NG)
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240 V, 1Ø (LP / NG)
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83.3/75
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3 Phase Models
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NA
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Surge Watts - 240V, 1 Ø
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35,470
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Surge Amps
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147
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Engine (Generac OHVI)
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999cc / V-Twin
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Alternator RPM
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3600
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Enclosure
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Aluminum
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Quiet-Test™
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Yes
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Sound Level (dBA @ exercise)
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60
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(dBA @ normal operation)
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66
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Dimensions (L" x W" x H")
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48x24x28
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Compatible Transfer Switches
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RTS
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Unit Weight (lbs.)
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451
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Full Spec Sheet
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Spec Sheet
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