Generators · Propane & Dual-Fuel
Best Propane & Dual-Fuel Inverter Generators
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A dual-fuel inverter runs on gasoline or a standard 20-lb propane tank. It makes clean power that's safe for electronics, and it's quiet enough for a campsite or a neighborhood. Champion is our favorite brand here. Its small inverters are quiet, run on either fuel out of the box, and link together with a parallel kit, so two small units can do the job of one big one.
What size generator do you need?
Check what you want to run at the same time. We add up the running watts, add the biggest single starting surge, and suggest a size. Motors (fridges, pumps, AC) briefly draw 2–3× their running watts when they start, so the biggest start-up surge can decide the size. You can't run 240V loads (most central AC and many well pumps) on a 120V portable without the right outlet and transfer switch.
Check at least one item to see a suggested size.
Wattage table and size guide (works without JavaScript)
| Appliance | Running W | Starting W |
|---|---|---|
| Refrigerator | 400 | 1,200 |
| Sump pump (1/2 HP) | 1,050 | 2,150 |
| Window AC (10,000 BTU) | 1,200 | 2,400 |
| Furnace blower fan (1/2 HP) | 800 | 1,600 |
| Microwave | 1,200 | — |
| Space heater | 1,500 | — |
| CPAP (with heated humidifier) | 120 | — |
| LED lights (10 bulbs) | 150 | — |
| TV (32–55 in) | 400 | — |
| Laptop / phone chargers | 100 | — |
| Well pump (1/2 HP) | 1,000 | 2,000 |
| RV air conditioner (13,500 BTU) | 2,000 | 3,500 |
| RV air conditioner (15,000 BTU) | 2,500 | 4,500 |
| Power tools (7-1/4 in circular saw) | 1,800 | 3,600 |
- Small inverter: a 2500W dual-fuel inverter: A 2500W inverter like the Champion 201323 covers this (1,850W running on gas, 1,665W on propane). Need a bit more later? Add a second unit and a parallel kit. See the Champion 2500W
- Mid-size: a 4500W inverter, or two 2500W units in parallel: A 4500W inverter (3,250–3,500W running on gas, 2,925–3,150W on propane) or two paralleled 2500W units fits this load. See the 4500W picks
- Larger portable dual-fuel generator: This is more than small inverters handle comfortably. Look at a big dual-fuel portable like the Westinghouse WGen9500DF (9,500W running on gas, 8,500W on propane). It's louder than an inverter. See the Westinghouse WGen9500DF
- Whole home or central AC: a home standby generator: Running central AC or most of the house needs an installed standby generator with a transfer switch. See home standby generators
Sizes in order: up to about 2,000W running → 2500W inverter; 2,000–3,500W → 4500W inverter or two 2500W in parallel; 3,500–7,500W → large portable; more, or central AC → home standby.
Figures are typical (the high end of the ranges in Champion's generator wattage chart). Check your appliance's label: watts = volts × amps. We add 20% headroom so the generator isn't run flat out, and propane makes about 10% fewer running watts than gasoline on most dual-fuel models.
Our picks
Sized for under ~3,500 running watts? These are for you. Bigger load? Jump to the Westinghouse WGen9500DF or home standby options.
1. Best small, quiet pair-up inverter (53 dBA, 43 lb)
Champion 2500W Dual Fuel Inverter (201323)
Portable inverter, gas / propane
Typical price: Check current price at Amazon (changes often)
Check price on AmazonSee price at Walmart- Capacity: 1.05 gal tank: up to 11.5 h on gas, 25 h on a 20-lb propane tank (25% load)
- Output: 2,500W starting / 1,850W running on gas (1,665W running on propane)
- Voltage: 120V (5-20R duplex, 12V DC); 53 dBA at 23 ft
- Solar input: n/a (parallel-ready with a Champion kit, sold separately)
- Weight: 43.2 lb
- Warranty: 3 years limited
Where to buy: the Amazon listing is currently sold by a third-party seller (BrandNewEngines, Inc.), not Amazon. Champion's 3-year limited warranty covers the original buyer with proof of purchase, and Champion accepts an Amazon invoice as proof. Generators usually can't be returned, so compare the seller and price before you buy.
2. Most watts per pound you can still carry
Champion 4500W Dual Fuel Inverter (201531)
Portable inverter, gas / propane
Typical price: About $699–$779 at Home Depot (Oct 2026)
See price at Home Depot- Capacity: 1.54 gal tank: up to 10 h on gas, 25 h on a 20-lb propane tank (25% load)
- Output: 4,500W starting / 3,250W running on gas (2,925W running on propane)
- Voltage: 120V (5-20R duplex, TT-30R RV, 12V DC); 64 dBA at 23 ft
- Solar input: n/a (parallel-ready; recoil start only)
- Weight: 51.8 lb (no wheels)
- Warranty: 3 years limited
Louder (64 dBA) than the 201319 but about half the weight. Champion's manual lists the 201248 or 100333 parallel kits for this model.
3. Best for RVs and home essentials: electric start, quietest 4500W
Champion 4500W Electric Start Dual Fuel Inverter (201319)
Portable inverter, gas / propane
Typical price: Check current price
Check price on AmazonSee price at Walmart- Capacity: 2.25 gal tank: up to 14 h on gas, 21 h on a 20-lb propane tank (25% load)
- Output: 4,500W starting / 3,500W running on gas (3,150W running on propane)
- Voltage: 120V (5-20R duplex, TT-30R RV, 12V DC); 61 dBA at 23 ft
- Solar input: n/a (parallel-ready; electric + recoil start)
- Weight: 99.2 lb (on wheels)
- Warranty: 3 years limited
Home Depot sells the same specs as model 201278. Champion's 201319 manual recommends the 100319 50A parallel kit.
Where to buy: the Amazon listing is currently sold by Amazon.com. Champion's 3-year limited warranty covers the original buyer with proof of purchase, and Champion accepts an Amazon invoice as proof. Generators usually can't be returned.
4. Most power for longer outages (not an inverter, much louder)
Westinghouse WGen9500DF
Portable gas / propane
Typical price: About $999 at Walmart (MSRP $1,249)
See price at WalmartCheck price on Amazon- Capacity: 6.6 gal tank: up to 12 h at 25% load
- Output: 9,500W running / 12,500W peak (gas)
- Voltage: 120V/240V
- Solar input: n/a (dual fuel)
- Weight: 211 lb
- Warranty: 3 years limited
Specs from each maker's product page; prices are typical ranges seen in October 2026 and change often.
Buy right once: Size for propane watts if propane is how you'll run it. Every model below makes less running power on propane than on gas.
Before you buy, check:
- Running watts on propane, not just the big starting-watts number on the box
- Whether you'll want a second unit later. Buy two parallel-ready models plus the right Champion kit
- Weight: 50 lb is a one-person carry, but 99 lb needs wheels
Side by side
| Model | Type | Capacity | Output | Voltage | Solar input | Weight | Warranty | Typical price |
|---|---|---|---|---|---|---|---|---|
| Champion 2500W Dual Fuel Inverter (201323) | Portable inverter, gas / propane | 1.05 gal tank: up to 11.5 h on gas, 25 h on a 20-lb propane tank (25% load) | 2,500W starting / 1,850W running on gas (1,665W running on propane) | 120V (5-20R duplex, 12V DC); 53 dBA at 23 ft | n/a (parallel-ready with a Champion kit, sold separately) | 43.2 lb | 3 years limited | Check current price at Amazon (changes often) |
| Champion 4500W Dual Fuel Inverter (201531) | Portable inverter, gas / propane | 1.54 gal tank: up to 10 h on gas, 25 h on a 20-lb propane tank (25% load) | 4,500W starting / 3,250W running on gas (2,925W running on propane) | 120V (5-20R duplex, TT-30R RV, 12V DC); 64 dBA at 23 ft | n/a (parallel-ready; recoil start only) | 51.8 lb (no wheels) | 3 years limited | About $699–$779 at Home Depot (Oct 2026) |
| Champion 4500W Electric Start Dual Fuel Inverter (201319) | Portable inverter, gas / propane | 2.25 gal tank: up to 14 h on gas, 21 h on a 20-lb propane tank (25% load) | 4,500W starting / 3,500W running on gas (3,150W running on propane) | 120V (5-20R duplex, TT-30R RV, 12V DC); 61 dBA at 23 ft | n/a (parallel-ready; electric + recoil start) | 99.2 lb (on wheels) | 3 years limited | Check current price |
| Westinghouse WGen9500DF | Portable gas / propane | 6.6 gal tank: up to 12 h at 25% load | 9,500W running / 12,500W peak (gas) | 120V/240V | n/a (dual fuel) | 211 lb | 3 years limited | About $999 at Walmart (MSRP $1,249) |
Propane: what you gain and what you give up
Propane stores for years without going stale and needs no fuel stabilizer, and it's easy to keep a few spare tanks. The trade-off is power. Champion's own ratings show running watts on propane about 10% lower than on gasoline: 1,850W vs 1,665W on the 2500W model, 3,500W vs 3,150W on the 201319, and 3,250W vs 2,925W on the 201531. Starting watts stay the same on these models. Runtime is longer on a 20-lb propane tank than on a tank of gas: Champion lists 25 h vs 11.5 h for the 2500W and 21 h vs 14 h for the 201319, all at 25% load. Expect much less at heavier loads. Propane output also falls in very cold weather, so keep tanks above freezing when you can.
Parallel kits: two quiet units instead of one loud one
All three Champion inverters here are parallel-ready (Champion calls this ParaLINK), but the kit is sold separately and it has to match your models:
- 100740 30A kit: links two 2000–3000W ParaLINK inverters, such as two 2500W units, and adds a TT-30R RV outlet and an L5-30R locking outlet.
- 100319 50A kit: for two inverters of 2500W or more, where at least one is 2800W+. It adds a 14-50R RV outlet and an L5-30R outlet. Champion's 201319 manual names it as the kit for that model.
- 201531: Champion's manual lists the 201248 or 100333 kits for this model.
Check Champion's Parallel Kit Selector before you buy a kit. A paralleled pair still makes 120V only, so it can't run 240V loads like a well pump.
Sources
- Champion Power Equipment, 201323 product page and operator's manual: championpowerequipment.com
- Champion Power Equipment, 201531 product page and operator's manual (price: Home Depot listing): championpowerequipment.com
- Champion Power Equipment, 201319 product page and operator's manual: championpowerequipment.com
- Westinghouse, WGen9500DF product page (price: Walmart listing): westinghouse.com
- Champion Power Equipment, 100740 30A ParaLINK Parallel Kit and 100319 50A Parallel Kit product pages and manuals: championpowerequipment.com