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Champion 3650W Dual Fuel Generator (201280)

Ranked #19 of 22 in Best Dual-Fuel Portable Generators: Champion, Westinghouse, DuroMax, WEN & FIRMAN (2026). Here is every spec we scored, where it came from, and how it compares.

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#19

Champion 3650W Dual Fuel Generator (201280)

Best for: RV-ready 3,650 W dual fuel with 14 h at half load

5.7/10

What we like

  • Top runtime at 50% load in this comparison (14 h)

Watch out for

  • Runtime at 25% load not published by Champion

Score breakdown

Running watts (gasoline) 25%
Starting watts 5%
Runtime at 50% load 15%
Runtime at 25% load * 5%
Noise 10%
Transfer-switch ready 10%
CO shutoff 10%
Runs on propane 10%
Weight 5%
CARB compliant * 5%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

* Other unpublished figures are scored at the category median so missing data neither helps nor hurts.

Running watts (gasoline)3650 W
Starting watts4550 W
Runtime at 50% load14 h
Runtime at 25% loadNot listed
Noise68 dBA
Transfer-switch readyNo
CO shutoffYes
Runs on propaneYes
Weight110 lb
CARB compliantNot listed
Starting (peak) watts, gasoline4,550 W
Running watts on propane3,825 W
Fuel tank4.7 gal
Outlets120V 30A (TT-30R) RV Outlet; 120V 30A Locking Outlet (L5-30R); 120V 20A Household Duplex Outlet
CO shutoffCO Shield
CARBNot published by the maker
PriceCheck price
Check price at Amazon
Specs source:

Champion 3650W Dual Fuel Generator (201280) head-to-head

Head-to-headDuroMax DS4500DX vs Champion 3650W Dual Fuel Generator (201280)

How it compares

Open the full comparison table

DuroMax DS10000EH
7.5/10
#1 · 8,000 W CARB-certified dual fuel
FIRMAN H08052
7.5/10
#2 · 8,000 W dual fuel with 12 h at half load
Champion 8500W Electric Start Dual Fuel Generator (201493)
7.3/10
#3 · 8,500 W dual fuel with CO Shield
Champion 9500W Electric Start Dual Fuel Generator (201508)
7.3/10
#4 · Most running watts here: 9,500 W with an L14-30R and 14-50R
Champion 8000W Electric Start Dual Fuel Generator (201568)
7.1/10
#5 · 8,000 W dual fuel with a 14-50R
FIRMAN T08073
7.1/10
#6 · Tri-fuel 8,000 W with L14-30R and 14-50R
Champion 7500W Electric Start Dual Fuel Generator (201281)
6.9/10
#7 · 7,500 W dual fuel with electric start
FIRMAN T04472
6.8/10
#8 · Tri-fuel 4,400 W with 13 h at half load
Champion 6250W Dual Fuel Generator (201463)
6.7/10
#9 · 6,250 W dual fuel with CO Shield
DuroMax XP10000X
6.6/10
#10 · 8,500 W gas with 22 h at quarter load
FIRMAN H07553
6.4/10
#11 · 7,500 W dual fuel with CO alert
WEN DF8000X
6.4/10
#12 · 6,500 W dual fuel with Watchdog CO shutdown
Champion 5500W Dual Fuel Generator (201505)
6.3/10
#13 · 5,500 W dual fuel, 11 h at half load
DuroMax XP4850EH
6.2/10
#14 · 3,850 W dual fuel with 23 h at quarter load
DuroMax DS4500DX
6.1/10
#15 · CARB-certified dual fuel with 25 h at quarter load
Westinghouse WGen5300DFv
5.8/10
#16 · CARB-compliant dual fuel, transfer-switch ready
Champion 6500W Dual Fuel Generator (201077)
5.8/10
#17 · 6,500 W dual fuel, 11 h at half load
DuroMax XP5500HX
5.7/10
#18 · 4,500 W dual fuel with CO alert and 19 h at quarter load
WEN GN8000M
5.4/10
#20 · 6,500 W gas, transfer-switch ready
Westinghouse WGen7500s
4.2/10
#21 · 7,500 W gas with an L14-30R
Westinghouse WGen3600DFv
4.1/10
#22 · CARB-compliant RV-ready dual fuel