Westinghouse iGen5000DFc
#1 in Mid-sizeFull review
A mid-size dual-fuel generator that can run a 30 A RV or a house’s essentials all night on one tank. Good for buyers who want long run time and remote start.
Amazon $999$999
An inverter generator runs its engine into an alternator and then through an inverter, so the power it puts out is as clean as a wall outlet and safe for laptops, TVs and furnace controls. The engine also slows down when the load is light, which makes it quieter and lets a tank last longer than on an open-frame generator of the same size. 19 of the 41 generators here can also run on propane, and 33 shut themselves off when carbon monoxide builds up.
Each size is ranked separately. Prices run from $349.99 to $4,899. Noise and run time are the makers’ ratings, since almost no reviewer publishes measured figures that can be compared across models.
Never run a generator indoors, in a garage or near an open window, even with a CO shutoff.
Top Picks
WEN DF480iX
#6 in Mid-sizeFull review
A light, low-cost dual-fuel inverter for RVs and outages, with CO shutoff and electric start. Plan on frequent refuelling or a propane tank for long runs.
Amazon $647$647
Shop by Size
Small
14 rankedUnder 2,500 running watts: camping, tailgating, a fridge and lights in an outage, and light enough for one person to lift.
Top rated: Champion 2500W Dual Fuel Inverter $575
Mid-size
16 ranked2,500 to 4,999 running watts: a 30 A RV with one air conditioner, or the essentials of a house through a transfer switch.
Top rated: Westinghouse iGen5000DFc $999
Large
11 ranked5,000 running watts and up: most of a house through a transfer switch, a 50 A RV, or a well pump and central furnace together.
Top rated: Westinghouse iGen8200TFc $1,399
Narrow It Down
By budget
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Best Small Inverter Generators
- Champion 2500W Dual Fuel Inverter#1 of 14Full review
A small, quiet dual-fuel inverter for campers and light outage backup who want the option of propane.
Amazon $575$5751,8505311.5$0.31 - DuroMax XP2300iH#2 of 14Full review
A small dual-fuel inverter for campers and RV owners who want propane flexibility, long runtime and CO shutoff in one quiet package. It costs more than lookalikes but includes wheels, a 30 A outlet and a parallel cable.
DuroMax $649$6491,8005213$0.36 - Westinghouse iGen2550c#3 of 14Full review
A light, quiet camping and tailgating generator with an RV outlet and CO shutoff. Good for running a fridge, lights and electronics in an outage.
Amazon $479$4791,9005211$0.25 - Champion 2500W Ultralight Inverter#4 of 14Full review
A light, quiet gas inverter for camping, tailgating and running a fridge and lights in an outage. Pick the dual-fuel 2500W instead if you want propane.
Amazon $518.25$518.251,8505311.5$0.28 - Generac GP2500i#5 of 14Full review
A small, easy-to-carry inverter for camping, tailgating and keeping a fridge and phones running in an outage. Buyers who want an RV outlet or electric start should look one size up.
Amazon $596.80$596.802,200538$0.27
Best Mid-Size Inverter Generators
- Westinghouse iGen5000DFc#1 of 16Full review
A mid-size dual-fuel generator that can run a 30 A RV or a house’s essentials all night on one tank. Good for buyers who want long run time and remote start.
Amazon $999$9993,9005218$0.26 - Generac iQ3800 DF#2 of 16Full review
A dual-fuel mid-size inverter with long run time and electric start, suited to home essentials and jobsites. RV owners will need an L5-30 adapter for the 30 A outlet.
Amazon $849$8493,000-20$0.28 - Westinghouse iGen4000DFc#3 of 16Full review
A compact dual-fuel generator for travel trailers and essential home circuits, with remote start and CO shutoff. Its small tank is the main trade-off.
Amazon $749.99$749.993,300527$0.23 - Generac iQ5200 DF#4 of 16Full review
A dual-fuel inverter with enough surge for an RV air conditioner and long propane run time. A good fit for home essentials and 30 A campers willing to use an adapter.
Amazon $1,039.75$1,039.753,900-15$0.27 - Predator 5000 Super Quiet Dual Fuel#5 of 16Full review
A strong-value dual-fuel RV and home-backup generator with remote start and long run time. The short warranty is the main catch.
Harbor Freight $999.99$999.993,90060.518.2$0.26
Best Large Inverter Generators
- Westinghouse iGen8200TFc#1 of 11Full review
A tri-fuel inverter for home backup through a transfer switch, with clean power and a 50 A outlet. Natural gas hookup makes it a strong pick for long outages.
Amazon $1,399$1,3996,6006017$0.21 - DuroMax XP9500iH#2 of 11Full review
A home-backup inverter for people who want to run most of a house, including central air on many systems, through a transfer switch. Long runtime, CO shutoff and a five-year warranty make it good value for its size.
Amazon $1,999$1,9997,6006121$0.26 - Westinghouse iGen12000DFc#3 of 11Full review
A large dual-fuel inverter for whole-home backup with clean power and long run time. Best for homeowners with a transfer switch who want inverter quiet at open-frame output.
Amazon $1,899$1,8999,0006419$0.21 - Champion 6500W Tri Fuel Inverter#4 of 11Full review
A mid-size home-backup inverter for people with a natural gas line or a transfer switch who want unattended starting. It also covers a 30 A RV.
Amazon $1,299$1,2995,2506418$0.25 - WEN TF1050iX#5 of 11Full review
A tri-fuel home-backup inverter that can sit on natural gas indefinitely. Good for a transfer switch or a 50 A RV.
WEN $1,649$1,6498,5506610.5$0.19
How We Rank
Each generator is scored on its price per running watt, its rated noise, its run time on a tank, the fuels it burns, whether it has a carbon monoxide shutoff, its warranty and how it starts.
| Factor | Measures | Weight |
|---|---|---|
| Value | price per running watt | 30% |
| Quiet | rated noise at light load | 20% |
| Run time | hours on a tank at 25% load | 15% |
| Fuel options | gasoline, propane and natural gas | 10% |
| CO safety | carbon monoxide shutoff | 10% |
| Warranty | warranty length | 10% |
| Starting | electric or remote start | 5% |
How we rank explains each factor in full.