Motorhead Premium Gasoline Generator 12000/21000 Watts


Motorhead Premium generator 12000/21000 watts, Honda engine GX630, 20 HP, Mecc Alte alternator; Runs on gasoline; Includes battery, and wheel kit; 13.5 gallon fuel tank; CARB Approved; Honda® 3-year commercial warranty; 2 Year Smart Generator Limited Warranty.


Available on backorder


Motorhead Premium Gasoline Powered Generator

This is our flagship generator and the largest gasoline powered generator we carry. The Motorhead Premium generator 12000/21000 watts is the perfect generator for either Commercial or Residential use. It has a premium quality frame with 4 beefy wheels for easy mobility. On the job site this unit can power all of your power tools without skipping a beat. It is also a great choice for a homeowner looking to power up a central air conditioner up to 5 tons, sum pump, well pump, heat, microwave, lights, entertainment center, computers, refrigerators, etc.

  • Model: The Motorhead – SG12003
  • 20 HP Honda GX630 OHV Engine
  • 13.5 Gallon fuel tank provides up to 11.7 hour run time at 50% load
  • 12000 running watts, 21000 starting watts
  • Compatible with 50 amp manual transfer switch
  • Electric start
  • Hydraulic/magnetic circuit breakers, GFCI & Twist-Lock Outlets
  • (2) 5-20R 120V 20A DUPLEX GFCI; (1) L14-30R 120V/240V 30A TWISTLOCK; (1) 14-50R 120V/240V 50A
  • Premium Mecc Alte Alternator with 100% copper windings, Made in Italy
  • The AVR (Automatic Voltage Regulator) system provided by Mecc Alte produces precise voltage (less than 5% THD) necessary to power your sensitive electronics like computers
  • Low oil shutoff
  • Decibel Level (db) 75
  • 420 pounds
  • 31.5 inch (L) x 30.5 inch (W) x 37.5 inch (H)
  • Battery and commercial 4 wheeled mobility kit included
  • Honda® 3-year commercial warranty
  • 2 Year Smart Generator Limited Warranty
  • CARB Compliant For California

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Author Rating
3 based on 40 votes
Brand Name
Smart Generators
Product Name
Motorhead Premium Gasoline Generator
USD 4999.99
Product Availability
Available in Stock

Additional information

Weight 420 lbs
Dimensions 31.5 x 30.5 x 37.5 in


Engine Brand

Starting Power

Running Power


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