Compare Generators Side-by-Side

Generator

Generator

15000 W

390 lbs

120/240V

120/240

760 cc OHV V-Twin, cast iron sleeve

713 cc Ducar OHV V-Twin

Electric

Electric, Remote

3 years

3 years

15000 W

18000 W

10000 W

13750 W

EPA, ANSI/PGMA G300-2023

EPA, ANSI/PGMA G300-2023

840876120712

814726029401

12000

14500

10000

13750

11

10

60

60

760 cc OHV V-Twin

Ducar OHV V-Twin

cast iron sleeve

Full Synthetic 5W-30, 10W-40, 10W-30

11

10

Low oil and overload protection

Low oil and overload protection, CO monitoring

Electric, Remote

3

The Firman T12071 is a 12,000-watt tri-fuel generator that runs on gasoline, propane, or natural gas. On gasoline, it delivers 15,000 starting watts and 12,000 running watts from a 760cc V-Twin engine with cast iron sleeves. This wattage handles most household circuits simultaneously, powering refrigerators, air conditioning units, well pumps, and power tools without strain. The tri-fuel design eliminates the need to choose between fuel sources. Users in areas with natural gas lines can tap into permanent fuel supplies. Propane users gain the ability to store fuel long-term without degradation. Gasoline remains the highest-output option for maximum starting power during heavy load surges. The 13.3-gallon fuel tank delivers 11 hours of runtime at 50 percent load on gasoline, meaning users can power a job site or home backup through a full work day or overnight without refueling. Propane cuts running watts to 11,000 and natural gas to 10,000, trading some capacity for fuel flexibility. The copper windings and low THD under 5 percent protect sensitive electronics like laptops, medical equipment, and modern televisions from voltage spikes. A 3-year residential warranty covers defects across all three fuel modes.

The Ford FG18KVTWTCO is a 14,500-watt tri-fuel generator built on a 713cc Ducar V-Twin engine. It runs on gasoline, propane, or natural gas, letting users switch fuels based on availability and storage constraints. The 18,000-watt starting capacity handles motor inrush loads for air compressors, welders, and heavy construction equipment. This is a stationary workhorse for whole-house backup and jobsite power, not a grab-and-go unit.