Tri-Fuel Generators

What Is a Tri-Fuel Generator?

A tri-fuel generator runs on three fuel types — gasoline, propane (LPG), and natural gas — giving you unmatched flexibility during power outages, storms, and emergencies. Unlike standard dual-fuel or gas-only units, tri-fuel generators let you switch fuel sources on the fly, so you are never left without power because one fuel type is unavailable.

Why Choose a Tri-Fuel Generator?

• Natural gas for unlimited runtime: Connect directly to your home natural gas line and run indefinitely — no refueling runs, no storage headaches.
• Propane for long-term storage: Propane stores for years without degrading, making it the ideal fuel to keep on hand for emergency preparedness.
• Gasoline for peak power output: When you need maximum wattage, gasoline delivers the highest power output of the three fuels.
• Storm and emergency ready: When gas stations run out during hurricanes or winter storms, you always have a backup fuel option ready.

Tri-Fuel vs. Dual-Fuel Generators

Dual-fuel generators run on gasoline and propane. Tri-fuel generators add natural gas compatibility — the critical third option that enables connection to your home gas line. For homeowners who want whole-home emergency coverage without the cost of a permanently installed standby generator, a tri-fuel inverter generator is the most cost-effective solution available.

Shop by Wattage

• 9,000W – 10,500W: Powers most home essentials including central AC, refrigerator, sump pump, and lighting simultaneously.
• 11,000W – 13,000W: Ideal for larger homes or running multiple high-draw appliances at once.
• 17,000W+: Heavy-duty coverage for large homes, light commercial use, or job sites.

Top Tri-Fuel Generator Brands

Mighty Generators is an authorized dealer for Cummins and Pulsar tri-fuel generators — two of the most trusted names in portable backup power. Cummins tri-fuel inverter generators are engineered for quiet, clean power output. Pulsar tri-fuel models offer a wide range of wattages with built-in CO safety sensors and remote start capability.

Frequently Asked Questions

Can a tri-fuel generator connect directly to my home natural gas line?

Yes. With the appropriate regulator and connection hose, tri-fuel generators can connect directly to a residential natural gas supply line, providing effectively unlimited runtime as long as gas service is active.

Do tri-fuel generators produce clean power for sensitive electronics?

Tri-fuel inverter generators produce clean sine wave power (THD under 3%), making them safe for laptops, medical devices, and other sensitive equipment.

What size tri-fuel generator do I need for home backup?

For running essential appliances (refrigerator, lights, fans, phone charging), a 9,000W to 10,500W unit is sufficient. To power central air conditioning alongside other appliances, look at 11,000W or higher.

How is a tri-fuel generator different from a standby generator?

Standby generators are permanently installed, automatic, and typically start at $6,000 or more installed. Tri-fuel portable generators deliver similar fuel flexibility at a significantly lower upfront cost — typically $1,500 to $4,000 — with the trade-off of manual startup.