Tri Fuel Generators

Tri Fuel Generators: Gas, Propane or Natural Gas Power

A tri fuel generator runs on gasoline, propane or natural gas. You pick whichever fuel is easiest to get when the power goes out. Our tri fuel generator range covers DuroMax and DuroStar portable units built for whole-home backup, job sites and RV use.

If natural gas is piped to your home, a tri fuel generator can run off that line. No fuel runs, no storing cans, no stopping mid-outage to refill.

Which Tri Fuel Generator Is Right for You?

• DuroStar DS13000MXT: 13,000 watts, 500cc engine, CO Alert and a 3 year warranty. A strong entry point for tri fuel home backup.
• DuroMax XP13000HXT: 13,000 watts. Same power class, built for essential home circuits and heavy tools.

Not sure which wattage you need? Our guide on what size generator to run a house walks through the maths.

Tri Fuel Generator Fuel Options Explained

Gasoline is easy to find and gives the generator its full rated output. Propane stores for years and burns cleaner, so it suits emergency kits. Natural gas is the long-outage fuel: as long as your gas utility is running, so is your generator.

Output usually drops a little on propane and natural gas compared with gasoline. Check each model's spec sheet for the exact figures before you size your setup.

Tri Fuel Generator for Whole-Home Backup

At 13,000 watts, these tri fuel generators can power essential circuits through a transfer switch. Think fridge, freezer, furnace fan, well pump, lights and a few outlets. Running a generator through a transfer switch keeps your home wiring safe and lets you power circuits without a tangle of extension cords. Compare every 13,000 watt generator we carry.

Have a licensed electrician install the transfer switch, and a licensed gas fitter handle any natural gas connection.

Tri Fuel vs Dual Fuel Generators

Dual fuel generators run on gasoline and propane. Tri fuel adds natural gas on top. If you have a gas line and expect longer outages, tri fuel gives you a fuel source you never have to haul or store. If you only need gas and propane, a dual fuel unit can cost less. Compare the options in our dual fuel generator collection.

Tri Fuel Generator FAQs

What is a tri fuel generator?

It is a generator that can run on three fuels: gasoline, propane and natural gas. You switch between them depending on what you have available.

What is the 80% rule for generators?

It is a common guideline to keep your continuous load at or below about 80% of the generator's rated output. It protects the engine and leaves room for startup surges from motors and compressors.

Can I run a generator overnight?

Many people do during outages, but only outdoors and well away from the house, with working CO alarms inside. Read our guide on running a generator overnight before you do.

Is a tri fuel generator worth it?

It is worth it if you have natural gas at home and want backup that does not depend on stored fuel. If you do not, a dual fuel unit may be all you need.

Helpful Buying Guides

Read Best Dual Fuel Generators (2026) (with our tri fuel picks), Dual Fuel vs Tri Fuel Generators, Gas vs Propane: Cost & Runtime and How to Size a Generator for Your Home. Browse the full generators range or our portable power stations for quieter, fuel-free backup.

Questions? Email support@kratopower.com or call 1-888-855-7286.

Safety note: Never run a generator indoors or in a garage. Carbon monoxide is deadly. This page is general information, not professional or electrical advice. Have a qualified professional install transfer switches and gas connections.