Best Dual Fuel Inverter Generators: Four Models Compared
A dual fuel inverter generator combines a gasoline or propane engine with an inverter, which produces the smooth power that laptops, phones and other electronics prefer. This guide compares the four dual fuel inverters in our generator comparison tool using manufacturer figures retrieved on 4 November 2026. It also covers what to look at if quiet running matters to you.
The four models side by side
| Specification | Champion201050 4000W Dual Fuel InverterInverter | Champion201278 4500W Electric Start Dual Fuel InverterInverter | Champion201321 4500W Dual Fuel Open Frame InverterInverter | WestinghouseiGen5000DFInverter |
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| Price and ownership cost | ||||
| Listed price (USD, estimate) | Not publishedChampion's product page does not state a price | Not publishedChampion's product page does not state a price | Not publishedChampion's product page does not state a price | $1,199.00Westinghouse MSRP |
| Price per rated watt (derived) | n/a | n/a | n/a | $0.31per watt, first fuel listed |
| Warranty | not stated on the page reviewed | 3 years limited, free lifetime technical support | 3 years limited, free lifetime technical support | 3 years residential, 1 year commercial |
| Maintenance | Not stated | Not stated | Not stated | Not stated |
| Oil capacity | Not stated | Not stated | Not stated | Not stated |
| Power | ||||
| Rated output by fuel |
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| Starting or surge watts | 4,000 W | 4,500 W | 4,500 W | 5,000 W |
| Fuel types | Gasoline / Propane | Gasoline / Propane | Gasoline / Propane | Gasoline / Propane |
| Engine | Not stated | Not stated | Not stated | Not stated |
| Displacement (cc) | 149 cc | 212 cc | 224 cc | 224 cc |
| Runtime, fuel use and running cost | ||||
| Fuel tank (gal) | 1.54 gal | 2.3 gal | 4.02 gal | 3.4 gal |
| Runtime on a tank, as stated |
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| Fuel use, as stated | Not stated | Not stated | Not stated | Not stated |
| Fuel per kWh (derived) | 0.205 galgasoline at 25% load, from tank size and stated runtime | 0.187 galgasoline at 25% load, from tank size and stated runtime | 0.201 galgasoline at 25% load, from tank size and stated runtime | 0.194 galgasoline at 25% load, from tank size and stated runtime |
| Fuel cost per kWh at your price (derived) | ||||
| Fuel cost per hour at that load (derived) | ||||
| Size and comfort | ||||
| Weight (lb) | 51.8 lb | 99.2 lb | 92.6 lb | 104.7 lb |
| Dimensions | Not stated | Not stated | Not stated | Not stated |
| Noise (as stated) | 64 dBA at 23 ft | 61 dB(A) at 23 ft | 64 dB(A) | 52 dBA |
| Starting method | Recoil | Electric, Recoil | Electric | Electric, Remote, Recoil |
| Features | ||||
| Inverter output | Yes | Yes | Yes | Yes |
| Total harmonic distortion | Not stated | under 3% | Not stated | 3% or less |
| Automatic voltage regulation (AVR) | Not stated | Not stated | Not stated | Not stated |
| CO sensor shutdown | Not stated | Not stated | Not stated | No |
| Transfer switch ready | Not stated | Not stated | Not stated | No |
| Parallel capable | Not stated | Yes | Yes | Yes |
| Outlets and connections | 5-20R duplex, TT-30R (25 A), 12V DC | 5-20R duplex, TT-30R, two USB, parallel port | TT-30R RV, 5-20R duplex, 12V 8A DC, parallel ports | 5-20R duplex, two USB, TT-30R |
| Fit | ||||
| Suited to | Camping and outdoors, RV and travel trailer, Essential circuits | Camping and outdoors, RV and travel trailer, Essential circuits | Camping and outdoors, RV and travel trailer, Essential circuits | Camping and outdoors, RV and travel trailer, Essential circuits |
| Also worth knowing | Runs on gasoline or propane | Dual fuel; two USB ports; parallel port | Open frame design; battery included for electric start; parallel ports | Inverter output, key fob start |
| Honest take | ||||
| Advantages |
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| Drawbacks |
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| Source | ||||
| Where the figures come from | Champion Power Equipment product pageRetrieved 2026-11-02 | Champion Power Equipment product pageRetrieved 2026-11-04 | Champion Power Equipment product pageRetrieved 2026-11-04 | Westinghouse product page (address still shows the earlier iGen4500DF name; page lists the iGen5000DF)Retrieved 2026-11-02 |
What stands out
- Quietest stated rating: the Westinghouse iGen5000DF at 52 dBA. The Champion 201278 states 61 dB(A) at 23 ft, the 201050 states 64 dBA at 23 ft and the 201321 states 64 dB(A). Makers do not all state the same measurement distance or load, so treat these as a rough guide and not a direct ranking.
- Lightest: the Champion 201050 at 51.8 lb. The 201321 is 92.6 lb, the 201278 is 99.2 lb and the iGen5000DF is 104.7 lb.
- Most gasoline running watts: the iGen5000DF at 3,900 W, then the 201321 at 3,650 W, the 201278 at 3,500 W and the 201050 at 3,000 W.
- Longest stated run time at 25% load: the 201321 at 22 hours on gasoline. The iGen5000DF states 18 hours on gasoline and 22 hours on propane, and the 201278 states 14 and 21.
- Only priced model: the iGen5000DF at $1,199 MSRP, about $0.31 per gasoline running watt. Champion does not publish prices on these pages.
Which to choose
| If you want | Look at | Why |
|---|---|---|
| The lightest dual fuel inverter | Champion 201050 | 51.8 lb, TT-30R outlet, 3,000 W on gasoline. |
| A balanced camping and RV unit | Champion 201278 | Electric start, two USB ports, parallel port and a THD under 3%. |
| The longest run time on one tank | Champion 201321 | 22 hours on gasoline and 21 hours on propane at 25% load. |
| The most power and the lowest noise rating | Westinghouse iGen5000DF | 3,900 W, 52 dBA and remote start, at the highest price of the four. |
Quiet dual fuel generators
Noise is stated differently by every maker. Look for the distance and load behind the number. Our guide to quiet camping generators explains how to read a dB(A) figure. Larger conventional dual fuel units are much louder: the Westinghouse WGen3600DF is rated at 68 dBA and the WGen14500DF at 74 dBA.
What we could not verify
- Champion prices and CO sensors. The product pages did not state either, so the tool shows “Not stated”.
- The iGen5000DF naming. Westinghouse’s page address uses “4500” while the specifications list 5000 peak and 3,900 running watts. We use the figures on the page.
- Reliability. We have no failure data for these models.
Related guides
- Best inverter generators
- Inverter vs conventional generators
- Dual fuel generators compared
- Is it safe to run a laptop on a generator?
Frequently asked questions
What is the best dual fuel inverter generator?
It depends on what you weigh. On our data, the Champion 201050 is the lightest, the 201321 has the longest stated run time and the iGen5000DF has the most power and the lowest stated noise.
Can an inverter generator safely power a laptop?
Inverter models are designed for sensitive electronics. The Champion 201278 states a THD under 3% and the iGen5000DF states 3% or less. Read the electronics guide for how to connect devices.
How much less power do I get on propane?
About 10%. The 201278 is rated at 3,150 W on propane against 3,500 W on gasoline, and the iGen5000DF at 3,500 W against 3,900 W.
