The best tri-fuel generator for most households is the DuroMax XP13000HXT, a 13,000-watt workhorse that balances raw power, propane and natural gas flexibility, and a price that undercuts bigger-name rivals. If you need to run an entire home including heavy 240-volt appliances, the Westinghouse WGen20000TFc with its 28,000 peak watts is the ceiling of this category, while the Westinghouse iGen8200TFc is the smarter choice for campers and RV owners who want quiet inverter power on all three fuels. The core tradeoff across tri-fuel generators is wattage versus portability versus power quality: conventional open-frame models deliver the most watts per dollar but are loud and rough on sensitive electronics, while inverter models cost more per watt but run cleaner and quieter. You’ll also need to decide whether natural gas hookup convenience matters more than the higher energy density of gasoline. Keep reading for the full breakdown of all 15 models.
Get backup power and energy gear delivered free — and shop member deals
- Fast, free delivery on millions of items
- Access to Prime Big Deal Days deals on October 6–7
- Prime Video, Amazon Music and more included
Complete the kit
Key Takeaways
- Conventional open-frame models like the DuroMax XP13000HXT and WEN 14,500-watt deliver roughly 40–60% more running wattage per dollar than inverter tri-fuel models, making them the default choice for pure home backup.
- Westinghouse dominates this lineup with six entries, but its models are not interchangeable — the iGen12000TFc and iGen8200TFc inverters serve completely different buyers than the WGen20000TFc whole-home brute.
- The DuroMax XP15000HXT and GENMAX GM15000ET occupy the high-output middle ground, but the DuroMax’s CO alert system gives it a safety edge that matters for garage-adjacent operation.
- The DuroStar DS13000MXT matches the XP13000HXT in wattage at a lower tier of refinement, which makes it a value play only if you can live without the DuroMax’s extras.
- Most 13,000–15,000 watt models here can start a 3-ton central AC unit, but only the inverter models (WEN 13,000-watt inverter, both Westinghouse iGen units) protect sensitive electronics without a separate line conditioner.
| DuroMax XP13000HXT 13,000-Watt Tri-Fuel Portable Generator |  | Best Overall | Peak Wattage: 13,000 watts | Running Wattage: 10,500 watts | Fuel Types: Gasoline, propane, natural gas | VIEW LATEST PRICE | See Our Full Breakdown |
| WEN 14,500-Watt Tri-Fuel Generator with Electric Start |  | Best Value for Home Backup | Surge Watts: 14,500 (gasoline); 12,500 (propane); 10,500 (natural gas) | Running Watts: 11,500 (gasoline); 10,300 (propane); 8,750 (natural gas) | Fuel Types: Gasoline, propane, natural gas | VIEW LATEST PRICE | See Our Full Breakdown |
| WEN TF-1450 14,500-Watt Tri-Fuel Generator with Electric Start |  | Best Complete Kit | Surge Output (Gasoline): 14,500 watts | Running Output (Gasoline): 11,500 watts | Running Output (Natural Gas): 8,750 watts | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse iGen8200TFc Tri-Fuel Portable Inverter Generator |  | Best for Sensitive Electronics and Camping | Gasoline Output: 6,600 running / 8,200 peak watts | Propane Output: 5,940 running / 7,380 peak watts | Natural Gas Output: 5,280 running / 6,560 peak watts | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse WGen14500TFc Tri-Fuel Portable Generator with Remote Electric Start and CO Sensor |  | Best for Whole-Home Power | Peak Output: 18,000 W gasoline; 16,000 W propane; 14,400 W natural gas | Running Output: 14,500 W gasoline; 13,000 W propane; 11,600 W natural gas | Engine: 713cc Westinghouse V-Twin OHV | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse 13,500-Watt Tri-Fuel Portable Generator with Remote Electric Start |  | Best for Whole-Home Backup | Fuel types: Gasoline, propane, natural gas | Peak / running output (gasoline): 13,500W / 10,500W | Running output (natural gas): 8,500W | VIEW LATEST PRICE | See Our Full Breakdown |
| GENMAX GM15000ET Tri-Fuel Portable Generator |  | Best High-Output Pick | Peak power: 15,000W | Fuel types: Gasoline, LPG, natural gas | Fuel tank: 10.56 gallons | VIEW LATEST PRICE | See Our Full Breakdown |
| Generac 12,500-Watt Tri-Fuel Portable Generator with Electric Start |  | Best Brand Trust Pick | Fuel types: Gasoline, liquid propane, natural gas | Running / starting output: 9,500W / 12,500W | Engine: 500cc Generac OHV | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse iGen12000TFc Tri-Fuel Portable Inverter Generator |  | Best Inverter for Sensitive Electronics | Fuel types: Gasoline, propane, natural gas | Gasoline output: 12,000W peak / 9,000W running | Natural gas output: 9,800W peak / 7,200W running | VIEW LATEST PRICE | See Our Full Breakdown |
| WEN 13,000-Watt Tri-Fuel Inverter Generator with Electric Start |  | Best for EV Charging and Versatile Outlets | Fuel types: Gasoline, propane, natural gas | Surge / running output (gasoline): 13,000W / 10,500W | Surge output (propane / natural gas): 11,250W / 10,000W | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse WGen9500TFc 12500 Peak Watt Tri-Fuel Portable Backup Generator |  | Best Overall | Peak Watts (Gasoline): 12,500 W | Running Watts (Gasoline): 9,500 W | Running Watts (Propane / Natural Gas): 8,500 W / 7,500 W | VIEW LATEST PRICE | See Our Full Breakdown |
| DuroStar DS13000MXT 13,000-Watt Tri-Fuel Portable Generator |  | Best Value for Whole-Home Power | Power Output: 13,000 watts | Engine Displacement: 500 cc | Fuel Types: Gasoline, propane, natural gas | VIEW LATEST PRICE | See Our Full Breakdown |
| DuroMax XP15000HXT 15,000-Watt Tri-Fuel Portable Generator with CO Alert |  | Best High-Output Pick for Large Homes | Power Output: 15,000 watts | Engine: 500cc OHV | Fuel Types: Gasoline, propane, natural gas | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse 14,500-Watt Tri-Fuel Portable Generator with Remote Electric Start |  | Best for Long Outages | Peak Output (Gasoline): 14,500 W (11,500 W running) | Peak Output (Propane / Natural Gas): 13,500 W / 12,000 W | Engine: 550cc 4-stroke OHV | VIEW LATEST PRICE | See Our Full Breakdown |
| Westinghouse WGen20000TFc Tri-Fuel Portable Generator, 28,000 Peak Watts |  | Best Premium Whole-House Beast | Peak Output: 28,000 W gasoline; 25,200 W propane; 22,400 W natural gas | Running Output: 20,000 W gasoline; 18,000 W propane; 16,000 W natural gas | Engine: 999cc 4-stroke OHV V-Twin | VIEW LATEST PRICE | See Our Full Breakdown |
| tri-fuel generator | Engine | Fuel Types | Runtime |
|---|---|---|---|
| DuroMax XP13000HXT 13,000-Watt | 500cc four-stroke OHV | Gasoline, propane, natural gas | 8 hours |
| WEN 14,500-Watt Tri-Fuel Gener | 500cc 4-stroke OHV | Gasoline, propane, natural gas | Up to 12 hours at half load on gasoline |
| WEN TF-1450 14,500-Watt Tri-Fu | 500cc 4-stroke OHV, electric start | Gasoline, propane, natural gas | Up to 12 hours at half load |
| Westinghouse iGen8200TFc Tri-F | 298cc 4-stroke OHV with cast iron sleeve | — | Up to 17 hours at 25% load |
| Westinghouse WGen14500TFc Tri- | 713cc Westinghouse V-Twin OHV | — | Up to 16 hours at 25% load on gasoline |
| Westinghouse 13,500-Watt Tri-F | 500cc 4-stroke OHV | Gasoline, propane, natural gas | — |
| GENMAX GM15000ET Tri-Fuel Port | — | Gasoline, LPG, natural gas | — |
| Generac 12,500-Watt Tri-Fuel P | 500cc Generac OHV | Gasoline, liquid propane, natural gas | Up to 9.5 hrs at 50% load; 14 hrs at 25% load |
| Westinghouse iGen12000TFc Tri- | 457cc 4-stroke OHV | Gasoline, propane, natural gas | — |
| WEN 13,000-Watt Tri-Fuel Inver | 550cc 4-stroke OHV | Gasoline, propane, natural gas | Up to 7.7 hours at half load |
| Westinghouse WGen9500TFc 12500 | 457cc 4-stroke OHV with cast iron sleeve | — | — |
| DuroStar DS13000MXT 13,000-Wat | — | Gasoline, propane, natural gas | — |
| DuroMax XP15000HXT 15,000-Watt | 500cc OHV | Gasoline, propane, natural gas | — |
| Westinghouse 14,500-Watt Tri-F | 550cc 4-stroke OHV | — | Up to 19 hours on gasoline; up to 7 hours on a 20 lb propane tank |
| Westinghouse WGen20000TFc Tri- | 999cc 4-stroke OHV V-Twin | — | Up to 15 hours at 25% load |
More Details on Our Top Picks
DuroMax XP13000HXT 13,000-Watt Tri-Fuel Portable Generator
This model earns the top spot because it balances raw power with everyday usability better than anything else in this lineup. The 10,500 running watts on gasoline is enough to feed a 50-amp transfer switch and keep most household circuits alive, and the remote start means you can bring it online from inside during a storm — something the WEN TF-1450 doesn’t offer. Compared with the Westinghouse WGen14500TFc, you give up about 4,000 peak watts, but you also get a machine that’s easier to move and store. The tradeoff is real: the 8.3-gallon tank only delivers 8 hours of runtime, so extended outages mean mid-storm refueling. Still, for most homeowners, this hits the sweet spot of output, fuel flexibility, and convenience.
Pros:- 13,000 peak watts with a 50-amp transfer switch-ready outlet for whole-home hookup
- Remote start plus push-button electric start for easy activation during bad weather
- CO Alert safety sensor adds protection when operating near the house
- True tri-fuel flexibility across gasoline, propane, and natural gas
Cons:- Only 8 hours of listed runtime despite the large 8.3-gallon tank
- Heavy steel construction makes repositioning a two-person job
Best for: Homeowners who want whole-house-capable backup power with remote-start convenience at a manageable size
Not ideal for: Anyone facing multi-day outages who can’t tolerate refueling every 8 hours
- Peak Wattage:13,000 watts
- Running Wattage:10,500 watts
- Fuel Types:Gasoline, propane, natural gas
- Engine:500cc four-stroke OHV
- Tank Capacity:8.3 gallons
- Runtime:8 hours
- Starting System:Electric push-button and remote start
- Outlets:7, including 50-amp transfer switch-ready
Our verdict“If you want one generator that does everything well without the bulk of an 18,000-watt monster, this is the pick.”
WEN 14,500-Watt Tri-Fuel Generator with Electric Start
This WEN undercuts comparable tri-fuel units by delivering 11,500 running watts with a three-year warranty while skipping the premium frills. Where the DuroMax XP13000HXT includes remote start, this model relies on electric start with a recoil backup — a fair trade for buyers who plan to keep the generator parked in one spot. The 12-hour half-load runtime on gasoline beats the DuroMax’s 8 hours, which matters more than remote start during extended outages. The digital data meter is a genuinely useful touch for monitoring load and fuel state. The catch: the natural gas hose is sold separately, so NG buyers face an extra purchase and possibly extra fittings before the tri-fuel promise is fully realized.
Pros:- 12 hours of half-load gasoline runtime outlasts many rivals in this wattage class
- Both L14-30R and 14-50R outlets support 120V/240V transfer switch connections
- WEN Watchdog CO shutdown sensor protects against carbon monoxide buildup
- Three-year limited warranty is longer than many competitors offer
Cons:- Natural gas hose not included, adding cost and setup steps
- Bulky, heavy frame makes transport awkward without help
Best for: Budget-conscious homeowners prioritizing long runtime and transfer-switch-ready power over convenience features
Not ideal for: Natural gas users who want everything needed in the box, since the NG hose is a separate purchase
- Surge Watts:14,500 (gasoline); 12,500 (propane); 10,500 (natural gas)
- Running Watts:11,500 (gasoline); 10,300 (propane); 8,750 (natural gas)
- Fuel Types:Gasoline, propane, natural gas
- Engine:500cc 4-stroke OHV
- Tank Capacity:8.2 gallons
- Runtime:Up to 12 hours at half load on gasoline
- Starting:Electric start with recoil backup
- Warranty:Three-year limited
Our verdict“A smart pick if you’d trade remote start for longer runtime and a longer warranty at this output level.”
WEN TF-1450 14,500-Watt Tri-Fuel Generator with Electric Start
Nearly identical on paper to the WEN 14,500-Watt above, this version earns its own slot for one reason: what’s in the box. It ships with a 6-foot LPG hose and an NG quick-connect adapter, so all three fuel types are genuinely ready on day one — no separate hose hunt like the standard WEN model requires. Output matches that sibling at 11,500 running watts on gasoline, with the same transfer-switch-friendly 14-50R and L14-30R outlets. That means buyers choosing between the two are really choosing between included accessories versus a potentially lower street price. The tradeoff to understand either way: output drops meaningfully on natural gas (8,750 running watts), so NG households should size their backup plan around the lower number, not the headline figure.
Pros:- Includes LPG hose and NG quick-connect adapter — complete tri-fuel kit from day one
- Transfer-switch-ready 120V/240V outlets for permanent home backup wiring
- Up to 12 hours of half-load runtime on gasoline
- Wheel kit and oil included for immediate setup
Cons:- Runtime only specified at half load, so heavy-load endurance is unclear
- Output varies considerably by fuel type, down to 8,750 running watts on natural gas
Best for: Buyers who want every hose and adapter included so all three fuels work out of the box
Not ideal for: Natural gas households running large loads, since NG output drops to 8,750 running watts
- Surge Output (Gasoline):14,500 watts
- Running Output (Gasoline):11,500 watts
- Running Output (Natural Gas):8,750 watts
- Fuel Types:Gasoline, propane, natural gas
- Engine:500cc 4-stroke OHV, electric start
- Tank Capacity:8.2 gallons
- Runtime:Up to 12 hours at half load
- Included Accessories:Wheel kit, oil, 6-ft LPG hose, NG quick-connect adapter
Our verdict“Choose this over the standard WEN 14,500 if you’d rather pay slightly more upfront than source fuel hoses separately.”
Westinghouse iGen8200TFc Tri-Fuel Portable Inverter Generator
This is the quiet diplomat of the group. Unlike the conventional WEN TF-1450 or DuroMax XP13000HXT, the iGen8200TFc uses inverter technology with under 3% THD, meaning laptops, TVs, and medical devices get clean power without risk. It’s also the only model here I’d consider campground-adjacent, running around 60 dBA at quarter load — far friendlier than the WGen14500TFc’s 74 dBA. The RV-ready TT-30R outlet reinforces that versatility. Tradeoffs are clear: 6,600 running watts won’t run a whole house the way the bigger conventional units will, and the runtime figure only applies at 25% load, so realistic mid-load endurance is much shorter. For tailgaters, RV owners, and electronics-heavy backup, though, clean power beats raw wattage.
Pros:- Under 3% THD inverter output is safe for sensitive electronics
- Around 60 dBA at 25% load is quiet enough for camping and close neighbors
- RV-ready TT-30R outlet plus a 50A outlet covers both campground and home backup use
- Up to 17 hours of runtime at 25% load with CO sensor and low-oil shutdown
Cons:- 6,600 running watts is far below conventional rivals for whole-home use
- Runtime quoted only at 25% load, so heavier use cuts it dramatically
Best for: RV owners, campers, and anyone backing up computers, TVs, or medical devices with clean inverter power
Not ideal for: Whole-house backup buyers — 6,600 running watts can’t carry a full electrical panel
- Gasoline Output:6,600 running / 8,200 peak watts
- Propane Output:5,940 running / 7,380 peak watts
- Natural Gas Output:5,280 running / 6,560 peak watts
- Engine:298cc 4-stroke OHV with cast iron sleeve
- Tank Capacity:3.9 gallons
- Runtime:Up to 17 hours at 25% load
- Noise Level:Around 60 dBA at 25% load
- THD:Less than 3%
Our verdict“If your priority is clean, quiet power for electronics and recreation rather than maximum household wattage, this is the one.”
Westinghouse WGen14500TFc Tri-Fuel Portable Generator with Remote Electric Start and CO Sensor
When a partial solution won’t do, this is the heavy hitter. With 14,500 running watts on gasoline and a 713cc V-Twin engine, it comfortably out-muscles the DuroMax XP13000HXT by roughly 4,000 watts — enough headroom to run central AC alongside essential circuits. The 10.5-gallon tank stretches to 16 hours at quarter load, nearly double the DuroMax’s endurance figure, and remote start means you never step into the weather to fire it up. The compromise is physical: this is a large, heavy machine that realistically lives wherever you first park it. At up to 74 dBA, it’s also loud compared with the Westinghouse iGen8200TFc, so placement away from bedrooms and neighbors matters. THD under 5% is better than typical conventional units, though still not inverter-clean.
Pros:- 14,500 running watts with an 18,000-watt peak handles large-home loads including central AC
- 10.5-gallon tank delivers up to 16 hours at 25% load for long outages
- Remote and push-button electric start plus CO and low-oil shutdown safety
- Under 5% THD is cleaner than most conventional generators for mixed electronics
Cons:- Very large and heavy — effectively a stationary unit once placed
- Up to 74 dBA operating volume requires thoughtful placement
- Runtime only specified at 25% load, obscuring real-world heavy-load endurance
Best for: Owners of large homes who need to run high-draw appliances like central air during extended outages
Not ideal for: Anyone without a permanent storage spot or help moving it — the size and weight make it impractical to relocate solo
- Peak Output:18,000 W gasoline; 16,000 W propane; 14,400 W natural gas
- Running Output:14,500 W gasoline; 13,000 W propane; 11,600 W natural gas
- Engine:713cc Westinghouse V-Twin OHV
- Tank Capacity:10.5 gallons
- Runtime:Up to 16 hours at 25% load on gasoline
- THD:Less than 5%
- Operating Volume:As low as 74 dBA
- Starting Method:Push-button and remote electric start
Our verdict“For buyers sizing a generator to an entire house rather than essentials, this is the strongest all-around choice in this batch.”
Westinghouse 13,500-Watt Tri-Fuel Portable Generator with Remote Electric Start
This Westinghouse earns its spot as the most practical whole-home backup in this batch. Its real advantage is the 9.5-gallon fuel tank, which stretches runtime to a claimed 19 hours — nearly double what the WEN 13,000-watt inverter manages at half load. The natural gas rating of 8,500 running watts is also high enough to feed a transfer switch through the included 50A outlet, meaning buyers hooked to a gas line get a fuel source that never runs dry. Compared with the Generac 12,500-watt unit, the three starting methods here (remote, electric, recoil) give a genuine fallback if the battery dies mid-outage. The tradeoff is raw muscle: its 10,500 running watts trail the GENMAX GM15000ET’s output, and the 500cc engine makes it heavy and awkward to move solo.
Pros:- Up to 19 hours of runtime from a 9.5-gallon tank
- Remote, electric, and recoil starting give three layers of redundancy
- Transfer-switch-ready 50A and 30A outlets plus RV and household options
- Automatic low-oil and CO shutdown on all fuel types
Cons:- Some assembly required out of the box
- Large displacement engine makes it bulky for one person to maneuver
Best for: Homeowners connecting to a transfer switch or natural gas line who need long overnight runtimes
Not ideal for: Campers or tailgaters — the size and 500cc engine make it impractical to load and transport regularly
- Fuel types:Gasoline, propane, natural gas
- Peak / running output (gasoline):13,500W / 10,500W
- Running output (natural gas):8,500W
- Engine:500cc 4-stroke OHV
- Fuel tank:9.5 gallons
- Maximum runtime:Up to 19 hours
- Starting methods:Remote, electric, recoil
- Warranty:3-year limited service, labor, and parts
Our verdict“Buy this if whole-house backup with maximum runtime matters more than portability; skip it if you need something you can lift into a truck bed.”
GENMAX GM15000ET Tri-Fuel Portable Generator
When raw wattage is the deciding factor, the GM15000ET stands apart with 15,000W peak and 11,000W rated power — comfortably ahead of the Westinghouse 13,500-watt model and the WEN 13,000-watt inverter on this list. That headroom matters for buyers running well pumps, HVAC startup surges, or multiple large appliances at once, where a smaller unit would trip or sag. The 10.56-gallon tank is the largest in this batch, and lifetime technical support is a genuine differentiator against the standard 3-year warranties elsewhere. The catch is predictably physical: this is a big, heavy machine, and unlike the Generac, GENMAX doesn’t publish a weight or noise figure, which makes planning for storage and sound a guessing game. It’s a stationary workhorse pretending to be portable.
Pros:- Highest peak and rated output in this batch
- 10.56-gallon tank supports extended runtimes
- One-button, remote, and recoil starting
- Lifetime technical support plus a 3-year warranty
Cons:- Bulk and weight make solo transport difficult
- No published weight or noise specifications
Best for: Buyers with heavy simultaneous loads — well pumps, electric water heaters, or workshop equipment — who need maximum surge capacity
Not ideal for: Anyone in a noise-sensitive neighborhood or tight storage space, since neither weight nor decibel output is disclosed
- Peak power:15,000W
- Fuel types:Gasoline, LPG, natural gas
- Fuel tank:10.56 gallons
- Starting methods:One-button, remote, recoil
- Voltage:120V/240V with transfer switch
- Safety feature:Built-in CO detection
- Warranty:3 years, lifetime technical support
Our verdict“This is the pick when wattage is the bottleneck — just be sure you have the space and muscle to place it permanently.”
Generac 12,500-Watt Tri-Fuel Portable Generator with Electric Start
The Generac’s appeal is less about spec-sheet dominance and more about refinement where it counts. Automatic voltage regulation delivers steadier power than the Westinghouse 13,500-watt conventional model, which matters for motors and compressors that dislike voltage dips, and the COsense system is one of the more trusted carbon monoxide implementations in the category. The 12,500 starting watts give it enough surge headroom for a fridge plus furnace blower, and it arrives complete — battery, oil, LP hose, and wheel kit in the box, unlike the Westinghouse which needs some assembly. The honest downside is fuel capacity: at 7.5 gallons, gasoline runtime tops out around 9.5 hours at half load, well short of the Westinghouse’s endurance, and 219 pounds means it lives wherever you first park it.
Pros:- Automatic voltage regulation for steadier, electronics-friendlier power
- Complete package includes battery, oil, LP hose, and wheel kit
- Strong 12,500W starting capacity handles surge loads
- COsense detection and shutdown
Cons:- Heavy at 219 pounds despite wheels and handle
- Gasoline runtime limited by the smaller 7.5-gallon tank
Best for: Buyers who prioritize a proven brand, regulated voltage output, and a complete out-of-box package for home backup
Not ideal for: Anyone needing multi-day gasoline runtime between refuels — the 7.5-gallon tank demands frequent fill-ups
- Fuel types:Gasoline, liquid propane, natural gas
- Running / starting output:9,500W / 12,500W
- Engine:500cc Generac OHV
- Fuel tank:7.5 gallons
- Runtime:Up to 9.5 hrs at 50% load; 14 hrs at 25% load
- Starting:Electric start with included 12V battery
- Safety feature:COsense carbon monoxide detection and shutdown
- Weight:219 lbs
Our verdict“A well-rounded, buy-it-once backup unit for buyers who value engineering polish and included accessories over maximum runtime or wattage.”
Westinghouse iGen12000TFc Tri-Fuel Portable Inverter Generator
The iGen12000TFc answers the question the conventional Westinghouse 13,500-watt model can’t: is the power clean enough for laptops, TVs, and modern furnaces? With total harmonic distortion at or below 3%, it is, and that’s the whole reason to pay the inverter premium. It’s also the quietest-leaning option here at as low as 64 dBA, with an Eco Mode that throttles the 457cc engine back when loads are light — a feature none of the open-frame units in this roundup offer. Parallel capability lets buyers pair two units later instead of replacing one giant generator. The tradeoffs are real: propane and natural gas outputs drop to 8,100W and 7,200W running respectively, and the headline 19-hour runtime only holds at 25% load, so a heavily loaded house drains it far faster than the Westinghouse conventional model.
Pros:- ≤3% THD makes it safe for sensitive electronics
- Quieter operation, down to 64 dBA, with Eco Mode fuel savings
- Parallel capability allows expanding capacity later
- 50A and 30A transfer-switch-ready outlets plus remote start
Cons:- Lower output on propane and natural gas than conventional rivals
- Advertised 19-hour runtime only applies at 25% load
Best for: Homeowners and RV owners running computers, medical devices, or modern electronics who need clean, quiet power
Not ideal for: Buyers chasing maximum watts per dollar or long runtime at heavy loads — inverter efficiency comes at a cost
- Fuel types:Gasoline, propane, natural gas
- Gasoline output:12,000W peak / 9,000W running
- Natural gas output:9,800W peak / 7,200W running
- Engine:457cc 4-stroke OHV
- Fuel tank:7.9 gallons
- Noise level:As low as 64 dBA
- THD:≤3%
- Key features:Remote start, parallel capable, CO sensor, Eco Mode
Our verdict“The right choice when power quality and noise matter more than raw wattage — ideal for households that live on electronics during outages.”
WEN 13,000-Watt Tri-Fuel Inverter Generator with Electric Start
The WEN TF1300iX earns its place through outlet flexibility nothing else here matches. Beyond the usual 50A and 30A twist-locks, it adds a 120V 10-50R outlet and USB ports, and WEN specifically rates it for Level 2 vehicle charging — a genuine rarity that makes it the pick for EV owners who want blackout-proof charging. As an inverter, its output is cleaner than the GENMAX or conventional Westinghouse, though it can’t match the Westinghouse iGen12000TFc’s documented 3% THD claim. The CO Watchdog sensor matches the safety baseline set by Generac’s COsense. Where it stumbles is endurance: 7.7 hours at half load from a 7.1-gallon tank is the shortest runtime in this batch, and the 550cc engine makes it no easier to move than the open-frame heavyweights despite the inverter label.
Pros:- Rated for Level 2 EV charging, a rare capability in this class
- Unmatched outlet variety including 50A, 30A, 120V 10-50R, DC, and USB
- Inverter design produces cleaner power than open-frame models
- CO Watchdog automatic shutdown sensor
Cons:- Shortest runtime in this batch at 7.7 hours half-load
- Large and bulky despite the inverter format
Best for: EV owners and buyers who want to charge devices, run tools, and power a transfer switch from one machine
Not ideal for: Extended-outage buyers who need overnight runtime — the small tank and 7.7-hour half-load figure mean frequent refueling
- Fuel types:Gasoline, propane, natural gas
- Surge / running output (gasoline):13,000W / 10,500W
- Surge output (propane / natural gas):11,250W / 10,000W
- Engine:550cc 4-stroke OHV
- Fuel tank:7.1 gallons
- Runtime:Up to 7.7 hours at half load
- Safety feature:CO Watchdog automatic shutdown sensor
- Warranty:Three-year limited
Our verdict“The most versatile plug-and-play option here, especially for EV owners — as long as you accept frequent fuel stops during long outages.”
Westinghouse WGen9500TFc 12500 Peak Watt Tri-Fuel Portable Backup Generator
The WGen9500TFc earns the top spot because it balances raw output, fuel flexibility, and usability better than anything else here. With 9,500 running watts on gasoline and a genuine 50-amp RV-ready outlet, it covers a transfer-switched home during an outage without the back-breaking weight of the DuroMax XP15000HXT or the WGen20000TFc. Compared with the DuroStar DS13000MXT, the Westinghouse publishes detailed wattage across all three fuels — propane and natural gas numbers included — so buyers know exactly what they’re getting before it shows up. The remote key fob start is a real quality-of-life feature when the unit lives outside in bad weather.
The tradeoffs are honest ones: it’s heavy despite the wheels, some assembly is required, and factory testing can leave residual oil odors.
Pros:- Full tri-fuel flexibility with published wattage ratings on gasoline, propane, and natural gas
- Remote key fob start plus electric and recoil backup
- Transfer switch ready 14-50R and L14-30R outlets with GFCI protection
- 3-year limited warranty with lifetime technical support
Cons:- Heavy and bulky even with wheels and handle
- Requires some assembly out of the box
- May arrive with residual oil or fuel odor from factory testing
Best for: Homeowners who want a transfer-switch-ready whole-house backup generator that’s still movable by one or two people
Not ideal for: Anyone wanting to run a full central AC plus every appliance at once — step up to the 15,000-watt-plus units for that
- Peak Watts (Gasoline):12,500 W
- Running Watts (Gasoline):9,500 W
- Running Watts (Propane / Natural Gas):8,500 W / 7,500 W
- Engine:457cc 4-stroke OHV with cast iron sleeve
- Fuel Tank Capacity:6.6 gallons
- Run Time:Up to 12 hours
- Start Type:Remote key fob, electric push-button, recoil
- Safety Features:CO shutdown, low oil shutdown, GFCI outlets
- Warranty:3-year limited warranty
Our verdict“If you only buy one generator on this list, this is the one that does the most things well for the most households.”
DuroStar DS13000MXT 13,000-Watt Tri-Fuel Portable Generator
The DS13000MXT occupies a smart middle ground: 13,000 watts of tri-fuel output with a transfer switch-ready 50-amp outlet, which is the same hardwiring capability you’d get from the pricier DuroMax XP15000HXT but at a lower output tier. For buyers whose priority is feeding a transfer panel rather than dragging cords, the 50A outlet is the feature that actually matters — it means one clean connection to your home’s circuits instead of a spaghetti pile of extension leads.
Push-button starting and CO Alert shutdown round out a spec sheet that punches above its price class. Where it falls short of the Westinghouse WGen9500TFc is transparency: no published runtime figures and no per-fuel wattage breakdown, so you’re planning your outage strategy with less information.
Pros:- Full tri-fuel operation on gasoline, propane, and natural gas
- Up to 13,000 watts of output
- Transfer switch-ready 50-amp outlet for clean home connection
- CO Alert automatic shutdown for safety
Cons:- No runtime or fuel consumption figures published
- No remote start option unlike the Westinghouse alternatives
- Documentation is thinner than comparable Westinghouse models
Best for: Buyers who want maximum transfer-switch-ready wattage per dollar without stepping up to the 15,000-watt class
Not ideal for: Detail-oriented planners who need documented runtime and per-fuel wattage numbers before committing
- Power Output:13,000 watts
- Engine Displacement:500 cc
- Fuel Types:Gasoline, propane, natural gas
- Starting:Push-button electric start
- Outlet:Transfer switch-ready 50-amp outlet
- Safety Feature:CO Alert automatic shutdown
Our verdict“A sensible pick if you want whole-home-capable wattage and a 50A outlet on a tighter budget, as long as you’re comfortable estimating fuel needs yourself.”
DuroMax XP15000HXT 15,000-Watt Tri-Fuel Portable Generator with CO Alert
When 13,000 watts isn’t enough — think central air conditioning plus a well pump plus kitchen appliances — the XP15000HXT is the logical next step. Its 15,000-watt output and 100% copper windings put it ahead of the DuroStar DS13000MXT for heavy simultaneous loads, and the large LED display showing load, voltage, and fuel level makes it easier to manage than the DuroStar’s barebones panel. Both push-button and remote start are included, matching the Westinghouse WGen9500TFc’s convenience.
The tradeoff is physical: the 500cc engine makes this a genuinely bulky machine that most people will position once and rarely move. Like its DuroStar sibling, it also lacks published runtime and fuel consumption data, so you’ll be sizing fuel storage on estimates rather than manufacturer figures.
Pros:- 15,000 watts of tri-fuel output for high-demand households
- Large LED display with load, voltage, frequency, and fuel gauges
- Push-button plus remote start convenience
- 100% copper windings for durability
Cons:- Bulky 500cc platform is difficult to transport regularly
- No runtime or fuel consumption figures provided
- Overkill and oversized for modest backup needs
Best for: Owners of larger homes who need to run high-draw appliances simultaneously during extended outages
Not ideal for: Campers or anyone who expects to load the generator in and out of a truck regularly — the size and weight will get old fast
- Power Output:15,000 watts
- Engine:500cc OHV
- Fuel Types:Gasoline, propane, natural gas
- Starting:Push-button and remote start
- Outlets:4x 120V 20A GFCI, 120V 30A twist lock, 120/240V 30A, 120/240V 50A
- Display:LED with fuel, load, voltage, frequency, and time
- Safety Feature:CO Alert automatic shutdown
- Windings:100% copper
Our verdict“The right choice when your load list genuinely exceeds what 13,000-watt-class units can carry and you have the space to stage it permanently.”
Westinghouse 14,500-Watt Tri-Fuel Portable Generator with Remote Electric Start
Extended outages are won on fuel capacity, and this 14,500-watt Westinghouse plays that game better than anything else in the lineup. Its 9.5-gallon tank delivers up to 19 hours of runtime on gasoline — dramatically longer than the WGen9500TFc’s 12 hours — meaning fewer 2 a.m. refuels when the power’s been out for days. The low-THD output and copper windings also make it safer for sensitive electronics than the DuroMax XP15000HXT, which doesn’t advertise clean-power specs, so laptops, TVs, and modern furnaces can run without worry.
Published per-fuel wattage (13,500 peak on propane, 12,000 on natural gas) also gives it a planning advantage over the DuroStar and DuroMax picks. The cost of that big tank and 550cc engine is portability — plan on rolling it into place once.
Pros:- Up to 19 hours of runtime on a single gasoline tank
- Low-THD output designed for sensitive electronics
- Full published wattage ratings across all three fuels
- Transfer switch ready with remote electric start
Cons:- Large tank and 550cc engine make it awkward to move
- May arrive with residual oil or fuel odor from factory testing
- Propane runtime drops to roughly 7 hours on a 20 lb tank
Best for: Households in areas prone to multi-day outages who want maximum runtime between refuels and clean power for electronics
Not ideal for: Anyone needing a movable jobsite or camping generator — the 9.5-gallon tank and heavy engine make it a stationary unit
- Peak Output (Gasoline):14,500 W (11,500 W running)
- Peak Output (Propane / Natural Gas):13,500 W / 12,000 W
- Engine:550cc 4-stroke OHV
- Fuel Tank Capacity:9.5 gallons
- Runtime:Up to 19 hours on gasoline; up to 7 hours on a 20 lb propane tank
- Power Quality:Low-THD output, copper windings
- Features:Remote electric start, transfer switch ready, fuel gauge
- Warranty:3-year limited coverage
Our verdict“The endurance pick — choose it when outages last days, not hours, and when clean power for electronics matters.”
Westinghouse WGen20000TFc Tri-Fuel Portable Generator, 28,000 Peak Watts
The WGen20000TFc is the ceiling of this roundup: 20,000 running watts on gasoline from a 999cc V-Twin, which is enough to run essentially an entire house, including multiple major appliances, at once. What separates it from the DuroMax XP15000HXT isn’t just raw power — it’s the 125A terminal block for hardwiring, which lets an electrician connect it directly to a panel the way a standby generator would be installed. Add sub-5% THD, four transfer-switch-ready 240V outlets, and 15 hours of runtime at quarter load, and it’s the closest a portable gets to whole-standby territory.
But be realistic about the downsides: this is a large, heavy machine that demands permanent staging, and the hardwire route requires a licensed electrician.
Pros:- 20,000 running watts on gasoline with 16,000 W available on natural gas
- 125A hardwire terminal block for direct panel connection
- Sub-5% THD output safe for sensitive electronics
- Up to 15 hours of runtime at 25% load with remote start
Cons:- 999cc V-Twin platform is cumbersome to maneuver or transport
- Hardwiring requires a licensed electrician
- Overkill and oversized for typical partial-home backup
Best for: Owners who want near-standby-generator coverage without installing a fixed unit, and who can dedicate permanent space to it
Not ideal for: Renters, campers, or occasional-outage users — this is far more generator than intermittent backup demands, and hardwiring adds cost
- Peak Output:28,000 W gasoline; 25,200 W propane; 22,400 W natural gas
- Running Output:20,000 W gasoline; 18,000 W propane; 16,000 W natural gas
- Engine:999cc 4-stroke OHV V-Twin
- Fuel Tank Capacity:17.2 gallons
- Runtime:Up to 15 hours at 25% load
- Power Quality:Less than 5% total harmonic distortion
- Starting:Push-button electric start and remote key fob
- Hardwire Connection:125A 240V AC terminal block
- Warranty:3-year limited warranty
Our verdict“Buy this if you want to run your whole house from a portable during an outage; skip it if a 50A outlet and 12,000 watts would already cover your essentials.”
How We Picked
I ranked these tri-fuel generators by weighing real-world running wattage on each fuel type, not just headline peak numbers — every tri-fuel unit loses power when running on propane or natural gas, and some lose more than others. I also prioritized starting systems, safety features, and power quality: electric start and remote start are practical necessities at these weights, and CO sensors distinguish the safest picks from the rest. Transfer-switch compatibility, including 240-volt outlets and neutral bonding provisions, separated true whole-home contenders from glorified job-site units.
The final layer of ranking logic was value per watt and build reputation. Models from established engine families with documented parts availability ranked higher than comparable newcomers, and inverter models were judged on clean-power output and noise rather than raw wattage alone. The result is a list ordered so the top picks cover the most common buyer situations first, with specialty picks — ultra-quiet, ultra-powerful, or budget — filling out the later slots.
| tri-fuel generator | Fuel Types |
|---|---|
| DuroMax XP13000HXT 13,000-Watt | Gasoline, propane, natural gas |
| WEN 14,500-Watt Tri-Fuel Gener | Gasoline, propane, natural gas |
| WEN TF-1450 14,500-Watt Tri-Fu | Gasoline, propane, natural gas |
| Westinghouse iGen8200TFc Tri-F | — |
| Westinghouse WGen14500TFc Tri- | — |
| Westinghouse 13,500-Watt Tri-F | Gasoline, propane, natural gas |
| GENMAX GM15000ET Tri-Fuel Port | Gasoline, LPG, natural gas |
| Generac 12,500-Watt Tri-Fuel P | Gasoline, liquid propane, natural gas |
| Westinghouse iGen12000TFc Tri- | Gasoline, propane, natural gas |
| WEN 13,000-Watt Tri-Fuel Inver | Gasoline, propane, natural gas |
| Westinghouse WGen9500TFc 12500 | — |
| DuroStar DS13000MXT 13,000-Wat | Gasoline, propane, natural gas |
| DuroMax XP15000HXT 15,000-Watt | Gasoline, propane, natural gas |
| Westinghouse 14,500-Watt Tri-F | — |
| Westinghouse WGen20000TFc Tri- | — |
Factors to Consider When Choosing Best Tri-fuel Generators
Tri-fuel generators live in a strange middle ground between convenience appliances and hard infrastructure, and the mistakes buyers make here tend to be expensive. Before committing to any model on this list, think through the following factors — they explain why two generators with identical wattage ratings can be completely wrong for each other’s owners.Calculate Your Real Wattage Needs — Then Add Headroom
The single most common tri-fuel mistake is buying based on peak watts rather than running watts on your worst-case fuel. A generator rated 13,000 watts on gasoline might deliver 20–25% less on propane and even less on natural gas, so size your purchase against the fuel you’ll actually rely on during an outage. Add up the running watts of your essentials, then layer in starting surges from motors — a central AC compressor can demand two to three times its running watts for a split second. Most households running a well pump, refrigerator, furnace fan, and some lighting need 9,000–12,000 running watts, which is why the 13,000-watt class dominates this roundup. Whole-house shoppers with multiple HVAC zones should skip straight to the 15,000+ watt tier. And leave 20% headroom: a generator running near its ceiling burns more fuel, runs hotter, and trips breakers at the worst moment.
Understand What Each Fuel Actually Costs You
Gasoline packs the most energy per gallon, but it degrades in storage within months and requires stabilizer rotation — a real burden for a machine you hope never to use. Propane is the sweet spot for most tri-fuel owners: it stores indefinitely, doesn’t gum up the carburetor, and starts reliably after years of sitting, though you sacrifice 10–20% of output. Natural gas is the set-and-forget option with unlimited runtime if your gas service stays up, but it delivers the lowest wattage of the three and ties you to a plumber-installed hookup. The right fuel strategy often means running gasoline during short outages and reserving propane for extended emergencies. Buyers who skip this math sometimes discover their ‘13,000-watt’ generator can’t start their AC on natural gas — after installation day. Match your primary fuel to how you’ll actually use the machine, not to the brochure’s biggest number.
Conventional vs. Inverter: The Decision That Shapes Everything Else
Open-frame conventional generators produce more watts per dollar and tolerate rough treatment, but their distorted power output can damage or shorten the life of sensitive electronics — anything from laptops to modern furnace control boards. Inverter models like the Westinghouse iGen series and WEN’s 13,000-watt inverter produce clean sine-wave power, idle down when loads are light, and run dramatically quieter, but you pay a premium per watt and they top out lower in this category. The mistake I see most often is buying a big conventional generator ‘for the whole house’ while planning to run home-office equipment through it during outages. A hybrid approach works too: a conventional unit for the big loads plus a small inverter for electronics. Decide this question first, because it eliminates roughly half the models on any list before you compare anything else.
Installation, Transfer Switches, and the Hidden Costs
The generator is often only half the budget. A 240-volt model intended for whole-home backup needs a transfer switch installed by an electrician, which typically adds a meaningful cost and a scheduling hassle — worth arranging before storm season, not during it. Natural gas operation requires a professional hookup and a regulator matched to the generator’s demand, and undersized gas lines are a silent killer of performance on big units like the 15,000–20,000 watt models here. Check your breaker panel capacity too: a 28,000-peak-watt generator feeding a 100-amp service is wasted capability. Also plan for a storage location at least 20 feet from the house with a roof or cover, a grounding plan where required, and extension cords or an inlet box if you skip the transfer switch. Budget for all of it upfront so the purchase doesn’t stall half-installed.
Weight, Mobility, and Who Will Actually Start It
Most of the generators in this roundup weigh between 200 and 450 pounds, and that changes the ownership experience more than buyers expect. Units in the 200–250 pound range with quality never-flat wheels can be muscled across a lawn by one reasonably fit adult; the biggest models realistically need two people or a permanent pad. If the person most likely to wheel the generator out during an outage isn’t the strongest member of the household, favor lighter models with electric or remote start — the Westinghouse remote-start units exist precisely for this scenario. Think about terrain too: pneumatic-style tires handle gravel and grass far better than small hard wheels. A generator that’s too heavy to deploy quickly is a generator that doesn’t get used.
Safety Features and Noise You Can Live With
Carbon monoxide shutdown systems have become standard on the better models, and I’d treat a CO sensor as non-negotiable — outages are exactly when people cut corners on generator placement. Models like the DuroMax XP15000HXT and the Westinghouse units with built-in CO sensors earn real credit here. Noise is the other livability factor: conventional tri-fuel generators typically run in the 72–78 dB range at working distance, which neighbors will notice at 2 a.m., while inverter models run conversation-quiet at partial load. Check your local ordinances too, because some municipalities restrict generator noise during evening hours. Finally, confirm the model has low-oil shutdown and overload protection; these are cheap features that prevent catastrophic engine damage during the chaotic first hours of an outage when nobody is watching the machine closely.
Frequently Asked Questions
Do tri-fuel generators really lose power on propane and natural gas?
Yes, and the drop is larger than most buyers expect. Propane typically costs you 10–20% of rated output, and natural gas can cost 20–30% or more, because both fuels carry less usable energy per unit of airflow than gasoline. A unit rated at 13,000 running watts on gasoline might deliver around 11,700 on propane and closer to 10,000 on natural gas. This matters most if you plan to start a central air conditioner or well pump, since starting surges scale down with the fuel too. The practical move is to size your generator against its natural gas or propane rating — whichever fuel your emergency plan relies on — rather than the gasoline figure printed on the box. Also confirm your natural gas line and meter can supply the BTU demand of larger units; an undersized supply line causes the same symptom as a weak fuel.
Is an inverter tri-fuel generator worth the extra cost over a conventional model?
It depends entirely on what you’re powering. Inverter models produce clean, stable electricity safe for laptops, TVs, and modern furnace control boards, and they idle down under light loads, which saves fuel and cuts noise dramatically. If your outage plan includes a home office, medical devices with electronics, or you live close to neighbors, the premium is money well spent. But if you’re running well pumps, refrigerators, power tools, and resistive heating loads, a conventional open-frame model delivers 40–60% more watts per dollar and tolerates abuse better. Some inverter tri-fuel models in the 12,000-watt class, like the Westinghouse iGen12000TFc, blur the line by approaching conventional output while keeping clean power — at a price. A reasonable rule: clean power for living spaces, conventional power for workloads.
Which fuel should I actually stock for emergencies?
For most owners, propane is the best emergency fuel strategy. It stores indefinitely without stabilizers, doesn’t degrade or gum up the carburetor during the years between uses, and a 20-pound or 100-pound tank is easy to rotate into a grill to keep stock fresh. Gasoline has the highest energy density but goes stale within months and is dangerous to store in quantity, plus gas stations lose power during outages right when you’d need to refuel. Natural gas is excellent if your supply stays on, but it’s not a stockpile — it’s infrastructure, and it delivers the lowest output of the three fuels. A sensible setup is one tank of stabilized gasoline for maximum output during short outages, plus two to four propane tanks for anything longer. This hybrid approach is exactly why tri-fuel flexibility justifies its price premium over dual-fuel models.
Can one of these generators run my central air conditioner?
Most of the 13,000-watt-and-up models on this list can start and run a typical 3-ton (36,000 BTU) central AC, but the details matter. Check your condenser’s LRA (Locked Rotor Amps) or starting amps on the data plate — a 3-ton unit can demand a starting surge of 8,000–12,000 watts for a fraction of a second, and that’s where peak ratings earn their keep. Remember the fuel penalty: a generator that starts your AC on gasoline may fail to start it on natural gas, so verify against your planned fuel. A soft-start kit installed on the AC compressor can cut the starting surge roughly in half and is one of the best hundred-dollar upgrades in backup power. If you have two HVAC zones or a larger 4–5 ton unit, skip the mid-size models and look at the 15,000-watt-and-up tier like the DuroMax XP15000HXT or GENMAX GM15000ET.
How much maintenance does a tri-fuel generator need if it rarely runs?
Less than gasoline-dependent machines, but not zero. The beauty of tri-fuel ownership is that you can run the unit on propane for monthly exercise sessions, which avoids the carburetor buildup that kills rarely-used gasoline generators. Plan on a 20–30 minute run under some load every month or two, an oil change after the initial break-in hours and then annually or per the hour meter, and a spark plug and air filter check each season. Fuel system maintenance differs by fuel: gasoline left in the tank should be stabilized or drained, while the propane and natural gas pathways need almost nothing beyond keeping connectors clean. Battery maintenance is the most neglected item — keep a trickle charger on the electric-start battery, because a dead starting battery on outage day is the most common failure I’d flag in this entire category. Budget an hour twice a year and the machine will start when you need it.
Conclusion
For most homeowners, the DuroMax XP13000HXT is the best overall tri-fuel generator — it hits the wattage sweet spot for whole-house essentials, handles all three fuels without drama, and leaves budget for the transfer switch. If pure value is the priority, the DuroStar DS13000MXT delivers near-identical output at a friendlier price, and the Generac 12,500-watt is worth a look for brand-name parts support on a budget. On the premium end, the Westinghouse WGen20000TFc is the pick for buyers who refuse to compromise on powering an entire large home, while the Westinghouse iGen12000TFc is the premium choice for clean inverter power at near-conventional output.
Beginners and occasional users should start with a remote-start model that simplifies deployment — the Westinghouse WGen9500TFc keeps wattage manageable while staying whole-house capable. RVers, campers, and tailgaters are better served by the portable, quiet Westinghouse iGen8200TFc than by any open-frame brute. Whatever you choose, size against your worst-case fuel, plan the transfer switch and fuel storage before storm season, and treat a CO-sensor-equipped model as the baseline rather than a bonus.
Fall Picks
fall essentials
As an affiliate, we earn on qualifying purchases.
