SG8400C Commercial Tri Fuel Generator 15000 Watts


Commercial Tri Fuel generator 8400 watts, Honda engine GX390, 11.7 HP; Mecc Alte Alternator; Runs on natural gas, propane (LPG), and gasoline; Includes Industrial Quality Zero-Gravity frame with wheels, battery, battery charger, and Drainzit for easy oil changes without the need for tools; 8 gallon fuel tank; 2 year warranty.

In stock


SG8400C Commercial Tri Fuel Generator 15000 Watts

The SG8400C Commercial Tri Fuel Generator 8400 Watts is the most powerful Commercial Tri Fuel generator on the market today with a Honda GX390 engine.  Built with the highest quality generator parts including a brush-less Mecc-Alte alternator. The unique ZERO GRAVITY FRAME is possibly the best made frame on the market. Besides being made of heavy duty steel with full welds, it’s ease of mobility will impress you. Runs on propane (LPG), natural gas, or gasoline right out of the box.

  • Model SG8400C
  • 13 HP Honda GX390 OHV Engine
  • 8 gallon gas tank that runs up to 12 hours on 50% load
  • Tri fuel generator 8400 watts, 15000 starting watts
  • Compatible with 30 amp manual transfer switch or 50 amp manual transfer switch
  • Run time on LPG (Propane) up to 20 hrs at 50-percent load per 40 pound fuel tank
  • Natural Gas requirement: 130,000 BTU per hour
  • Output is derated 20% for natural gas
  • Electric/Recoil Start
  • 4 x 120-volt 20-amp outlets and 1 x 120/240-volt 30-amp twist outlet
  • GenSmart™ Digital Display – Tracks Usage, Load, Voltage, Hertz, and Engine Maintenance
  • 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
  • 301 pounds
  • 30 inch (L) x 23 inch (W) x 26 inch (H)
  • Unique heavy duty industrial zero gravity frame
  • Battery (with Charger) and Wheel Kit Included
  • 2 Year Smart Generator Limited Warranty
  • Made in the USA

It is easy to adjust the load block from LPG to Natural Gas.  The load block on your generator’s was tuned to 11 wc at our shop, perfect pressure for our LPG hoses.  Before running on Natural Gas give us a call and a tech will teach you how to adjust the load block over the phone.

Please read our Shipping Policy

Author Rating
2.5 based on 20 votes
Brand Name
Smart Generators
Product Name
SG8400C Commercial Tri Fuel Generator
USD 3199.99
Product Availability
Available in Stock

Additional information

Weight 301 lbs
Dimensions 31.25 x 20.625 x 24 in


Engine Brand

Starting Power

Running Power


  1. (verified owner)

    When I opened the box and took a look at this beautiful generator I thought to myself, this is a work of art, it belongs in a museum!

Add a review