Lowe's Home Improvement
Generac Centurion 20000-Watt (LP)/18000-Watt (NG) Standby Generator with Automatic Transfer Switch

Generac Centurion 20000-Watt (LP)/18000-Watt (NG) Standby Generator with Automatic Transfer Switch

Item #: 494338 |  Model #: 6258

4.82 / 5 273 Reviews

Lifestyle/in-use image: accessories not included

Centurion 20000-Watt (LP)/18000-Watt (NG) Standby Generator with Automatic Transfer Switch

  • Up to whole house protection with the 200-amp, NEMA 3R (aluminum outdoor enclosure) smart switch
  • Generac's OHVI® engine is purpose-built to run dependably for extended periods, delivering power when you need it most
  • Evolution digital controller provides a user-friendly LED display and controls for programmable diagnostics and information at-a-glance
  • TruePower technology provides clean, smooth operation of sensitive electronics and appliances
  • External main circuit breaker with system status and maintenance interval LED indicator lights offer an easy way to see generator status without opening the enclosure
  • Mobile Link™ compatible, so you can add the Mobile Link™ wireless remote monitoring system and receive status updates using your computer, tablet, or smart phone - giving you peace of mind, even when you're away
  • Our durable powder-coat finish helps make the sturdy, Galvanneal steel enclosure perfect for all weather conditions and able to withstand 150 mph winds
  • Consumer-friendly customer care hours to answer calls about the product
  • 5-year limited warranty
Fuel Type Liquid propane or natural gas
Running Watt Range 19100 to 22000
Liquid Propane Rated Wattage 20000
Natural Gas Rated Wattage 18000
Engine Displacement (Cu. Centimeters) 999
Engine Series OHVI
Automatic Transfer Switch Included Yes
Number of Circuits Whole house
Transfer Switch Amps 200
Transfer Switch Rating 200 amp
Engine Brand Generac
Full Load Fuel Consumption (GPH) 4
Weight (lbs.) 451
Response Time (Seconds) 15
Exercise Cycle Yes
Length (Inches) 48
Width (Inches) 25
Low Oil Shut Down Yes
Hour Meter Yes
Overload Protection Yes
Automatic Voltage Regulation Yes
Circuits Protected Whole house
Total Harmonic Distortion <5%
Warranty 5-year limited
Color/Finish Family Gray
Material Steel
UL Safety Listing Yes
CSA Safety Listing No
ETL Safety Listing No
Normal Operating Load dB Noise Level 66
Series Name Centurion
Wattage Range (Liquid Propane) 15100 to 20000
Fuel Consumption 1/2 Load (NG) 201.8
Wattage Range (Natural Gas) 15100 to 20000
Fuel Consumption 1/2 Load (LP) 2.14
Amperage at 240 Volts (Liquid Propane) 83.3
Amperage at 240 Volts (Natural Gas) 75
Community Q&A
  • Save Item
    Save Item Help
    Save an item to your
    • Lists to collect ideas and plan future projects.
    • Home Profile to organize and store details about your home.
  • Set a Reminder Save Item Help

    Set a Reminder and we'll send you an email when it's time to stock up on items you buy regularly or seasonally, like air filters, fertilizer or mulch. Use notes to record details (quantity, gift recipient, etc.).

  • Go to Your Account