Best Tri-Fuel Generators: Gasoline, Propane & Natural Gas Compared
Three fuel options. One backup-power strategy. Compare high-output tri-fuel generators for home emergencies, understand their real fuel-specific wattage ratings, and find the right fit for your electrical loads.
Our comparison focuses on Westinghouse, DuroMax and Champion models, with practical guidance on natural gas connections, transfer switches, running costs and safety.
Compare Tri-Fuel Generators
A tri-fuel generator can operate on gasoline, propane or natural gas. That makes it especially appealing for homeowners who want alternatives when gasoline becomes difficult to obtain during an extended power outage.
But choosing the right generator involves more than comparing the largest wattage number on the label. Output changes with fuel type, natural gas requires adequate supply pressure and flow, and connecting a generator to household wiring requires properly installed transfer equipment.
This guide compares three distinct tri-fuel choices and explains the practical differences that matter before you invest in a home-backup setup.
Never operate a portable generator indoors, inside a garage, carport, basement, shed, enclosed porch or other enclosed or partially enclosed space. Operate it outdoors at least 20 feet from doors, windows and vents, with exhaust directed away from occupied buildings. Install functioning carbon monoxide alarms.
Never connect a generator to household wiring through an ordinary wall outlet. Use properly selected transfer equipment installed by a qualified electrician.
Quick Answer: Which Tri-Fuel Generator Is Best?
Best overall for substantial home backup: The Westinghouse WGen11500TFc provides 11,500 running watts on gasoline, 10,500 on propane and 9,500 on natural gas. Its 120/240V configuration makes it particularly relevant for residential backup.
Best heavy-duty alternative: The DuroMax XP13000HXT offers 10,500 running watts on gasoline, three fuel choices and a robust electrical connection configuration.
Best lower-output inverter option: The Champion 201176 delivers 7,250 running watts on gasoline, 6,525 on propane and 5,875 on natural gas, using an open-frame inverter design.
The most important buying rule: Size your generator using its continuous running watts on the fuel you actually intend to use—not its gasoline peak rating.
Best Tri-Fuel Generators at a Glance
These models are intended for different buyers. The Westinghouse emphasizes substantial fuel-flexible output, the DuroMax offers another heavy-duty configuration, and the Champion prioritizes inverter technology at a lower output level.
Westinghouse WGen11500TFc
High-output tri-fuel generator with substantial natural gas running power and 120/240V output.
Best for: Larger essential-load backup and homes with natural gas access.
Check PriceDuroMax XP13000HXT
Large tri-fuel generator with home-backup-oriented receptacles and multiple starting methods.
Best for: Buyers comparing substantial portable backup systems.
Check PriceChampion 201176
Open-frame tri-fuel inverter with lower output and economy-mode operation.
Best for: Smaller essential-load plans where inverter technology matters.
Check PriceTri-Fuel Generator Comparison Table
Running watts describe sustained electrical output. Peak or starting watts refer to short-duration capability and should not be used as the continuous operating rating.
| Specification | Westinghouse WGen11500TFc | DuroMax XP13000HXT | Champion 201176 |
|---|---|---|---|
| Gasoline running | 11,500W | 10,500W | 7,250W |
| Gasoline peak | 14,500W | 13,000W | 9,000W |
| Propane running | 10,500W | Confirm exact revision | 6,525W |
| Natural gas running | 9,500W | Confirm exact revision | 5,875W |
| Voltage | 120/240V | 120/240V | 120/240V |
| Generator type | Conventional | Conventional | Open-frame inverter |
| Starting methods | Remote, electric, recoil | Remote, electric, recoil | Electric, recoil |
| CO shutdown | Yes | Yes | Yes |
| Best use | Substantial home backup | Heavy-duty alternative | Lower-output inverter backup |
DuroMax has published differing propane and natural gas wattage figures for XP13000HXT listings. Check the exact unit's current documentation before sizing an installation.
Detailed Tri-Fuel Generator Reviews
1. Westinghouse WGen11500TFc — Best for Substantial Home Backup
The Westinghouse WGen11500TFc is our leading recommendation because its published running output remains substantial across all three fuels.
Westinghouse specifies 11,500 running watts on gasoline, 10,500 on propane and 9,500 on natural gas. Its respective peak ratings are 14,500W, 13,500W and 12,000W.
For homeowners planning to use a natural gas connection, the 9,500W continuous rating is especially important. It is approximately 83% of the gasoline running rating.
The generator supports 120/240V output and includes L14-30R and 14-50R receptacles. These make it relevant to appropriately designed home backup installations.
Westinghouse also publishes a total harmonic distortion rating of 5% or less, although compatibility with specific sensitive equipment should still be checked.
Its 9.5-gallon gasoline tank is advertised for up to 19 hours at 25% load. Actual runtime depends on the operating load and conditions.
- 11,500W gasoline running output.
- 9,500W natural gas running output.
- 120/240V electrical capability.
- 30A and 50A receptacles.
- Remote and electric starting.
- CO sensor shutdown.
- Published THD of 5% or less.
- Large and heavy.
- Not an enclosed quiet inverter.
- Requires suitable natural gas supply.
- Household integration adds installation cost.
- Check emissions eligibility in your state.
Who should buy it: Homeowners who want high running power and plan to use gasoline, propane or natural gas.
Who should avoid it: Buyers looking for a compact, lightweight recreational generator or the lowest possible operating noise.
Verdict: The best-balanced high-output choice among these three models for substantial home backup.
Check Price2. DuroMax XP13000HXT — High-Output Tri-Fuel Alternative
The DuroMax XP13000HXT is designed for buyers who want substantial portable backup capability with three fuel options.
Its published gasoline rating is 13,000 peak watts and 10,500 running watts. It uses a 500cc engine and offers 120/240V output.
The generator includes 30A and 50A connection options, electric and remote starting, and DuroMax's CO Alert shutdown system.
An important issue is specification consistency. Manufacturer listings for this model have shown differing propane and natural gas wattage ratings.
This is not a detail to ignore. A difference of several hundred watts can matter when a generator is being sized around demanding household circuits or motor loads.
Before purchasing, confirm the exact model revision and fuel-specific output using its current manual or manufacturer documentation.
- 10,500W gasoline running output.
- Gasoline, propane and natural gas.
- 120/240V capability.
- 30A and 50A receptacles.
- Remote and electric starting.
- CO Alert shutdown system.
- Large and heavy.
- Not a quiet enclosed inverter.
- Fuel ratings require revision-specific checking.
- Natural gas installation requires planning.
- Check regional emissions restrictions.
Who should buy it: Homeowners comparing heavy-duty 120/240V tri-fuel options.
Who should avoid it: Buyers who need a small, easy-to-carry generator or who cannot accommodate a suitable outdoor operating area.
Verdict: A serious alternative to Westinghouse, provided the exact fuel-specific ratings meet the intended loads.
Check Price3. Champion 201176 — Best Lower-Output Inverter Option
The Champion 201176 is an open-frame tri-fuel inverter rather than a conventional high-output generator.
Champion publishes 7,250 running watts on gasoline, 6,525 on propane, and 5,875 on natural gas.
Its gasoline starting rating is 9,000W. The generator provides 120/240V output, electric starting, an economy mode and CO Shield protection.
The lower natural gas rating means it is not a direct substitute for the larger generators in every home-backup plan.
However, buyers with smaller essential-load requirements may prefer its inverter technology and operating characteristics.
Champion lists a 72 dBA noise rating and a dry weight of approximately 165.8 lb. It is still a substantial open-frame generator, not a compact silent unit.
- Tri-fuel inverter design.
- Published running watts for all fuels.
- 120/240V output.
- Electric starting.
- Economy mode.
- CO Shield protection.
- Lower output than the larger models.
- 5,875W natural gas running rating.
- Still heavy and open-frame.
- Not suitable for every whole-home load plan.
- Not parallel-capable per manufacturer specifications.
Who should buy it: Buyers who want tri-fuel inverter technology and have a load plan that fits its available output.
Who should avoid it: Homeowners who need substantially more than 5,875W of continuous natural gas power.
Verdict: A compelling option when inverter technology is a priority and the lower wattage is sufficient.
Check PriceGasoline vs. Propane vs. Natural Gas
The advantage of a tri-fuel generator is not that every fuel performs identically. It is the ability to choose among three fuel sources when conditions change.
How Much Output Is Lost on Natural Gas?
Consider the published Westinghouse WGen11500TFc running ratings:
| Fuel | Running output | Relative to gasoline |
|---|---|---|
| Gasoline | 11,500W | 100% |
| Propane | 10,500W | Approximately 91% |
| Natural gas | 9,500W | Approximately 83% |
If you intend to operate this generator on natural gas, use 9,500W as the manufacturer-rated running output for load planning, not the 14,500W gasoline peak rating.
Percentages are calculated from manufacturer running watt ratings and rounded. They are not independent laboratory measurements.
Does Natural Gas Mean Unlimited Runtime?
No. A fixed natural gas connection can provide convenient extended operation, but the fuel supply is not guaranteed during every emergency.
Utility interruptions, inadequate gas piping, incorrect regulators, pressure limitations and insufficient flow can all affect operation.
The generator also requires normal engine maintenance, including oil servicing and compliance with the manufacturer's operating limits.
Have a qualified professional evaluate the gas service, pipe sizing, regulators, required fuel flow and connection equipment. Do not assume an existing outdoor gas outlet is suitable for a large generator.
How to Size a Tri-Fuel Generator for Your Home
Generator sizing should begin with actual electrical loads rather than a desired wattage number.
Step 1: Identify Essential Appliances
List the equipment you need during an outage. A refrigerator, freezer, internet router and lights create a very different demand from central air conditioning, electric heating and a well pump.
| Example appliance | Illustrative running watts | Important consideration |
|---|---|---|
| Refrigerator | 150W | Compressor startup demand. |
| Freezer | 120W | Additional startup watts. |
| Internet equipment | 30W | Network service may be unavailable. |
| LED lighting | 80W | Depends on number of fixtures. |
| Television | 100W | Model-dependent consumption. |
| Other small electronics | 120W | Depends on connected devices. |
| Illustrative total | 600W | Running load only. |
These are hypothetical planning values, not measured specifications for particular appliances. Use the actual equipment's documentation or reliable measurements when sizing a generator.
Step 2: Account for Starting Loads
Motors in refrigerators, pumps and air conditioners may briefly draw substantially more power when starting.
Identify the largest realistic startup event while other equipment is already running. Account for the possibility of overlapping motor starts.
Step 3: Size for Your Primary Fuel
If your plan depends on natural gas, use the natural gas running rating. If you plan to rely on propane, use the propane rating instead.
Step 4: Check 120V and 240V Needs
Certain household appliances and pumps require 240V power. Confirm the generator supports the required voltage and that appropriate receptacles and transfer equipment are available.
Step 5: Leave Operating Headroom
Avoid designing a backup system that must operate continuously at the generator's absolute rated limit.
Allow for realistic load variation and motor-starting events. A qualified electrician can help evaluate the final load plan.
Can a Tri-Fuel Generator Power an Entire House?
A suitably sized tri-fuel generator can support selected household circuits through properly installed transfer equipment.
However, that does not automatically mean it can run every appliance in a house simultaneously.
Do not plug a generator into a normal household outlet or use a male-to-male power cord. Improper backfeeding can endanger utility workers, occupants and electrical equipment.
Use properly selected transfer equipment installed by a qualified electrician.
Does a 50A Receptacle Mean 12,000W of Continuous Power?
Not necessarily. A 50A, 240V receptacle has a nominal 12,000VA connection rating, but the generator's available running output may be lower.
For example, a generator rated at 9,500W running on natural gas cannot continuously provide 12,000W simply because it has a 50A receptacle.
Receptacle, breaker, conductor and generator ratings must all be respected.
Is Remote Start the Same as Automatic Backup?
No. Remote start allows a user to initiate engine starting from a distance under the manufacturer's permitted conditions.
A true automatic backup system requires compatible monitoring, switching and safety equipment beyond a remote-start feature.
Which Tri-Fuel Generator Fuel Is Cheapest?
Operating cost depends on local fuel prices, generator consumption at the actual load, and the fuel being used.
Gasoline is commonly priced by the gallon. Propane may be sold by the gallon or cylinder. Natural gas is commonly billed by therms or other utility units.
Comparing the unit prices directly does not establish which fuel is cheapest.
Fuel Cost Calculation
Hourly fuel cost = fuel consumed per hour × price per fuel unit.
For example, assume a hypothetical generator consumes 0.8 gallons of gasoline per hour and gasoline costs $3.50 per gallon.
0.8 × $3.50 = $2.80 per hour.
Over 24 hours, the illustrative fuel cost would be $67.20.
These are hypothetical values used to demonstrate the calculation. They are not current fuel prices or measured consumption figures for the reviewed models.
For an accurate comparison, use each generator's documented fuel consumption at comparable electrical loads and apply your actual local fuel prices.
Also consider maintenance, oil changes, fuel storage, propane-cylinder handling and any natural gas installation expenses.
Tri-Fuel Inverter vs. Conventional Generator
Inverter technology can affect electrical output characteristics and engine operation, but it is not the only factor that determines generator quality.
Conventional Tri-Fuel Generators
Conventional generators are often selected for substantial output and home-backup-oriented electrical connections.
The Westinghouse WGen11500TFc and DuroMax XP13000HXT are examples in this comparison.
Conventional construction does not automatically mean poor electrical output quality. Westinghouse publishes a THD rating of 5% or less for the WGen11500TFc.
Tri-Fuel Inverter Generators
Inverter generators use electronic power conversion and control. Some designs can adjust engine operation to the connected load.
The Champion 201176 is an open-frame inverter with an economy mode.
However, an inverter generator is not automatically quieter, lighter or better for every home.
Compare actual noise, fuel-specific running output, THD specifications, outlet configuration, weight and intended use. Do not make the decision based only on the word "inverter."
Eight Things to Check Before Buying
Tri-Fuel Generator Safety Essentials
Every fuel option involves combustion. Natural gas and propane do not make a portable generator safe to operate indoors.
- Outdoor operation only: Never run a generator in an enclosed or partially enclosed space.
- Safe placement: Keep the generator at least 20 feet from doors, windows and vents, with exhaust directed away.
- CO alarms: Install functioning battery-powered or battery-backup carbon monoxide alarms.
- No backfeeding: Use appropriate transfer equipment installed correctly.
- Fuel handling: Follow the manufacturer's approved procedures for every fuel.
- Weather protection: Follow approved operating instructions without enclosing the generator or obstructing ventilation.
- Electrical ratings: Do not overload the generator, receptacles, breakers or cords.
- Gas connections: Use suitable components and qualified installation.
A built-in carbon monoxide sensor provides an additional safety feature. It does not make indoor operation safe or eliminate the need for household CO alarms.
Frequently Asked Questions
What is a tri-fuel generator?
A tri-fuel generator is designed to operate using gasoline, propane or natural gas according to the manufacturer's approved configurations.
Is tri-fuel better than dual-fuel?
Tri-fuel provides an additional natural gas option. That can be valuable for homeowners with suitable gas service. Dual-fuel may still be preferable when gasoline and propane meet your needs.
Can a tri-fuel generator run continuously on natural gas?
Natural gas may support extended operation when the supply is adequate. However, service interruptions, maintenance requirements and manufacturer operating limits still apply.
Does a tri-fuel generator make the same power on all fuels?
No. The generators compared here have lower published running output on gaseous fuels than on gasoline.
Can a tri-fuel generator run central air conditioning?
Some suitably sized generators can support certain central AC systems, but compatibility depends on running load, compressor starting demand, other connected equipment and the fuel-specific generator rating.
Can I connect one to my home's natural gas line?
Some tri-fuel generators are designed for a suitable natural gas supply. The connection must meet the manufacturer's requirements and applicable codes. Have it evaluated by a qualified professional.
Does remote start mean automatic outage backup?
No. Remote starting and automatic standby operation are different. Automatic backup requires compatible sensing, controls and transfer equipment.
Which fuel is best for long outages?
The answer depends on local fuel access. Natural gas can reduce refueling when service remains available. Propane provides stored fuel, while gasoline may offer higher output on these models.
Is a 13,000W tri-fuel generator enough for an entire house?
A 13,000W peak rating does not establish whole-house capability. Check continuous output on the intended fuel, motor starting demands and the home's actual electrical loads.
Are tri-fuel generators safe for sensitive electronics?
Compatibility depends on the generator's output characteristics and the connected equipment's requirements. Check the exact THD specification and manufacturer guidance rather than assuming all generators behave alike.
Final Verdict: Which Tri-Fuel Generator Should You Buy?
For substantial residential backup, the Westinghouse WGen11500TFc is our preferred option among these three models.
Its published 9,500W natural gas running rating, 120/240V output and useful connection options make it a strong candidate for a properly designed home backup installation.
The DuroMax XP13000HXT is a heavy-duty alternative for buyers who prefer its configuration and verify the exact fuel-specific ratings.
The Champion 201176 is worth considering when an inverter design is preferred and its lower natural gas output is sufficient.
Choose according to your actual electrical loads, available fuel, natural gas supply, installation requirements and operating conditions. Do not buy solely by the largest peak-watt number.
Research Sources and Editorial Methodology
Recommendations are based on published manufacturer specifications, fuel-specific output, electrical features, practical ownership considerations and safety requirements.
We do not claim firsthand product testing or present manufacturer specifications as independently measured performance.
- Westinghouse WGen11500TFc — Manufacturer specifications
- DuroMax XP13000HXT — Manufacturer specifications
- Champion 201176 — Manufacturer specifications
- CDC — Use a Generator Safely
Manufacturer specifications can vary by production revision or regional configuration. Confirm the documentation for the exact model before purchasing.