If you need a reliable 15kW class portable generator that can run on natural gas, this guide compares top tri-fuel options. These units are suitable for medium-to-large homes, workshops, or job sites where fuel flexibility and quick electric-start matter. The top picks balance power, fuel versatility, and practical features like CO sensors and transfer-switch readiness. This shortlist helps buyers decide who benefits most from each model—home backup, remote work sites, or grid-independent power during outages.
Overview of chosen products at a glance. The table summarizes key points to compare quickly.
| Product | Best For | Fuel Options | Key Feature |
|---|---|---|---|
| DuroStar DS13000MXT | Whole-home backup | Gas, Propane, Natural Gas | CO Alert, Transfer Switch Ready |
| Westinghouse 14500 Peak | Larger homes, frequent outages | Gas, Propane, Natural Gas | Long runtime, strong engine |
| DuroMax XP13000HXT | Flexible fuel convenience | Gas, Propane, Natural Gas | CO Alert, Tri Fuel |
| Generac 12,500 Starting Watt | Emergency backup, durable | Gas, Propane, Natural Gas | Electric Start, CO sensor |
| Westinghouse 13500 Peak | Mid-to-large homes | Gas, Propane, Natural Gas | Remote start, CO shutdown |
DuroStar DS13000MXT Tri Fuel Generator
The DS13000MXT delivers 13,000 watts and runs on gasoline, propane, or natural gas. It includes a push-button start and a transfer-switch-ready 50-amp outlet for reliable whole-home backup. CO Alert helps monitor emissions for safety. Best for homeowners seeking high power with flexible fuel options and a simple start mechanism.
Who it’s best for: households requiring maximum load support during outages with flexible fuel choices. Better for: users who prioritize ease of use and transfer-switch readiness. Caution: Tri fuel versatility can add weight and size, limiting portability compared with lighter units.
Westinghouse 14500 Peak Watt Tri-Fuel
This model offers up to 14,500 peak watts and 11,500 running watts on gasoline, with strong propane and natural gas performance. It’s equipped with a heavy-duty engine and long runtime on a full tank, making it well-suited for larger homes or remote job sites. Best for: homeowners needing substantial continuous power with flexible fuel sources.
Better for: extended outages where you might draw consistent power. Caution: Propane and natural gas runtimes may be reduced versus gasoline in some loads; assess fuel availability.
DuroMax XP13000HXT Tri Fuel
The XP13000HXT provides 13,000 watts with tri-fuel capability and a CO Alert for safety. It emphasizes fuel flexibility—gasoline, propane, or natural gas. Best for: users who want a mid-sized tri-fuel option with a strong feature set and robust power output.
Choose this if: you value CO monitoring and a clear power panel. Caution: Heavier, may require a solid base for stable operation, especially on soft ground.
Westinghouse 12500 Watt Dual Fuel
This dual-fuel model (gasoline and propane) offers up to 12,500 starting watts and 9,500 running watts on natural gas, with remote start and transfer-switch readiness. It includes multiple outlets and a digital hour meter. Best for: users who prefer a robust Westinghouse engine and reliable remote operation.
Better for: smaller-to-mid-size loads that still require transfer-switch compatibility. Caution: Natural gas performance varies by supply pressure; test in your setup.
Generac 12,500 Starting Watt Tri-Fuel
Generac’s tri-fuel model provides 9,500 running watts and 12,500 starting watts across fuel types, with CO sensing for safety and a straightforward electric-start system. It’s a strong all-around option for home backup and emergency use. Best for: households seeking a well-known brand with easy starting in emergencies.
Limitations: COsense requires battery and sensor maintenance; ensure battery is kept charged for reliable start in cold weather.
Westinghouse 13500 Peak Tri-Fuel
This model delivers 13,500 peak watts with 10,500 running watts on gasoline; propane and natural gas deliver strong performance as well. It includes a remote start, transfer-switch readiness, and a long runtime on a large fuel tank. Best for: homes that need substantial, flexible power with a convenient start method.
Limitation: Elevated fuel costs for propane or natural gas during long outages may affect total cost of ownership.
WEN 14,500-Watt Tri-Fuel
The WEN TF-1450X switches between gasoline, propane, and natural gas with a simple dial. It runs on 120V and 240V, making it compatible with transfer switches and emergency backup plans. CO Watchdog provides automatic shutoff if CO is detected. Best for: buyers who want a versatile, feature-rich option with transfer-switch readiness.
Consideration: WEN’s lower-cost positioning may reflect differences in engine durability over long-term heavy use; plan maintenance accordingly.
Westinghouse 18000 Peak Tri-Fuel With CO
Top-tier power with 18,000 peak watts on gas, 16,000 on propane, and 14,400 on natural gas. It features a 713cc V-Twin engine, CO sensor, low oil shutdown, long runtime, and a digital hour meter. Best for: large homes, heavy-duty backup, or job sites needing substantial tri-fuel power with advanced safety features.
Limitation: Higher fuel consumption under heavy loads and larger footprint may reduce portability.
Buying Guide
Fuel versatility: Tri-fuel options provide maximum flexibility when fuel availability is uncertain. Consider the balance between peak watts and running watts for your needs.
Power needs: Assess your home’s essential circuits and expected surge loads. A model in the 12,500–18,000 starting watt range is typically suitable for medium-to-large homes.
Starting method: Electric start improves reliability in cold weather. If you choose manual, ensure you have a robust starter mechanism and battery maintenance plan.
Transfer-switch readiness: For seamless operation with home panels, select models with transfer-switch-ready outlets or guaranteed compatibility with your transfer switch installer.
CO safety features: CO sensors or CO shutdown systems protect occupants and enhance safety during prolonged outages.
Runtime and fuel tank: Longer runtimes reduce refueling frequency. Check fuel capacities and expected runtimes at common loads to fit your outage duration expectations.
Portability and durability: Heavier units offer greater power, but ensure you have a solid base for stability and consider wheel kits and handles for mobility.
Maintenance and service: Look for reputable brands with accessible spare parts and clear service guidelines to minimize downtime after outages.
FAQ
- What does tri-fuel mean for my generator?
Tri-fuel means the unit can run on gasoline, propane, or natural gas, providing flexibility during fuel supply disruptions. - Is 15kW enough for a large home?
Most mid-to-large homes with essential circuits can be supported by 12,500–18,000 starting watts, depending on load and starting surges. - Do these generators require professional installation?
Transfer switch installation is typically done by a licensed electrician or installer; many models are transfer-switch ready but still need proper hookup. - Which fuel is cheapest to run long-term?
Propane and natural gas often have lower per-gallon energy costs in outages, but fuel availability and efficiency vary by model and load. - How important is CO safety?
CO safety is essential for indoor and semi-enclosed use; select models with CO sensors or automatic shutdown for safety. - Can I use these generators on a job site?
Yes, many tri-fuel generators are designed for job-site power with robust outlets and offshore-grade durability, but verify local codes and noise restrictions.