Generac iQ3800 DF
#2 in Mid-sizeFull 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$849
3.9/5
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.
- 3,900 / 5,200 WRunning / starting
- Gasoline, propaneFuel
- 15 hr at 25% loadRun time
- 107 lbWeight
- $0.27Price / W
Check price at Amazon$1,039.75
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Enough starting power for a 13,500 BTU RV air conditioner on gasoline
- Refills from a 20 lb propane tank, which lasts longer than its gas tank at light load
- Push-button start with automatic choke
- Shuts itself off if carbon monoxide builds up nearby
Cons
- No TT-30R; a travel trailer needs an L5-30 to TT-30 adapter
- No 240 V outlet, so it cannot run a 240 V well pump or a full transfer switch
- Amazon lists it as ships-later rather than in stock
How it scores
The rating comes from 7 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | iQ5200 DF (G0089450, 49-state) |
|---|---|
| Output | |
| Gasoline | 3,900 W running, 5,200 W starting |
| Propane | 3,500 W running, 4,700 W starting |
| Outlets | 4 × 120 V, L5-30, USB |
| Parallel capable | Yes |
| Total harmonic distortion | under 3% |
| Price per watt | $0.27 |
| Fuel and run time | |
| Fuel | Gasoline, propane |
| Tank | 3.2 gal |
| Run time (gasoline) | 15 hr at 25% load |
| Run time (propane, 20 lb tank) | 20 hr |
| Engine | 223 cc |
| Noise and safety | |
| CO shutoff | Yes |
| Build | |
| Starting | Electric and recoil |
| App | No |
| Wheels | Yes |
| Dimensions | 24.6 x 20.3 x 22.5 in |
| Weight | 107 lb |
| Warranty | 3 years |
Alternatives in this size
Westinghouse iGen4000DFc
#3 in Mid-sizeFull 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$749.99
Predator 5000 Super Quiet Dual Fuel
#5 in Mid-sizeFull 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$999.99
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