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
4.4/5
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.
- 3,900 / 5,000 WRunning / starting
- Gasoline, propaneFuel
- 18 hr at 25% loadRun time
- 52 dBA at light loadNoise
- 105.8 lbWeight
- $0.26Price / W
Check price at Amazon$999
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs up to 18 hours on a tank at light load
- Refills from propane as well as gasoline
- Remote key fob and push-button start
- TT-30R outlet runs a 30 A travel trailer directly
- Shuts itself off if carbon monoxide builds up nearby
Cons
- No 240 V outlet without buying the parallel kit, so it cannot feed a home transfer switch alone
- Over 100 lb, so it needs its wheels rather than being lifted
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 | iGen5000DFc |
|---|---|
| Output | |
| Gasoline | 3,900 W running, 5,000 W starting |
| Propane | 3,500 W running, 4,500 W starting |
| Outlets | 2 × 120 V, TT-30 (RV), USB |
| Parallel capable | Yes |
| Total harmonic distortion | under 3% |
| Price per watt | $0.26 |
| Fuel and run time | |
| Fuel | Gasoline, propane |
| Tank | 3.4 gal |
| Run time (gasoline) | 18 hr at 25% load |
| Run time (propane, 20 lb tank) | 22 hr |
| Engine | 224 cc |
| Noise and safety | |
| Rated noise (light load) | 52 dBA |
| CO shutoff | Yes |
| CARB compliant | No |
| Build | |
| Starting | Remote, electric and recoil |
| App | No |
| Wheels | Yes |
| Dimensions | 24.5 x 17.5 x 20 in |
| Weight | 105.8 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
Generac iQ5200 DF
#4 in Mid-sizeFull 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$1,039.75
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