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Firman W03383 vs WEN 56380i

Firman W03383 vs WEN 56380i

Comparing the Firman W03383 and WEN 56380i inverter generators. We break down power, noise, weight, and warranty to help you choose the right fit.

  • Firman W03383
  • WEN 56380i

Comparison Overview

The Firman W03383 and WEN 56380i are closely matched gasoline inverter generators sitting in the same mid-size power class. The WEN 56380i edges ahead on raw output with 3400 running watts and 3800 starting watts, compared to the Firman's 3300 running watts and 3650 starting watts. That extra 100 to 150 watts may not sound like much, but it can make a difference when you're running multiple appliances or need to start a stubborn motor.

Noise levels are nearly identical, with the Firman rated at 58 dB and the WEN at 57 dB, a difference most people won't notice in practice. Weight is where the Firman pulls ahead more meaningfully. At 91 pounds, it's over 8 pounds lighter than the WEN's 99.2 pounds, which matters when you're loading it into a truck bed or hauling it around a campsite.

The Firman also comes with a longer 3-year warranty versus the WEN's 2-year coverage, and it posts a slightly higher overall score of 6.03 compared to 5.72. Runtime data isn't directly comparable here since the Firman reports 9 hours at 25% load while the WEN lists 8.5 hours at 50% load. Buyers who prioritize portability and warranty protection may lean toward the Firman, while those who want a bit more power headroom might prefer the WEN.

Key takeaways

  • WEN 56380i delivers 3400 running watts and 3800 starting watts for more power headroom
  • Firman W03383 weighs 91 pounds, over 8 pounds lighter than the WEN's 99.2 pounds
  • Firman offers a 3-year warranty compared to WEN's 2-year coverage
  • Both are inverter generators producing clean power safe for sensitive electronics
  • Noise levels are nearly identical at 58 dB for Firman and 57 dB for WEN
  • Firman scores 6.03 overall versus the WEN's 5.72 in total rating

Best use cases

Choose the Firman W03383 if you plan to move your generator frequently. Whether you're loading it into an RV, carrying it to a tailgate, or repositioning it around a work area, the 91-pound weight makes a real difference over the WEN's 99.2 pounds. The Firman also makes more sense if long-term peace of mind matters to you, since its 3-year warranty gives you an extra year of coverage. For light home backup scenarios where you're running a refrigerator, a few lights, and charging devices, the Firman's 3300 running watts will handle the job comfortably. Its 9-hour runtime at 25% load also suggests solid fuel efficiency during lighter use.

Choose the WEN 56380i if you need every watt you can get. The 3800 starting watts give you more room to kick on higher-demand appliances like a small window AC unit or a power-hungry tool. If you're using this on a job site where you might run a circular saw alongside a charger and a work light, that extra starting capacity reduces the risk of tripping the overload protection. The WEN's 8.5 hours at 50% load is also a useful real-world benchmark, since many users run their generators closer to half capacity than quarter capacity.

Both generators produce clean inverter power, making them safe for laptops, phones, and other sensitive electronics. Neither is whisper-quiet, but at 57 to 58 dB they're reasonable for campground or neighborhood use. The tradeoff really comes down to whether you value the Firman's lighter build and longer warranty or the WEN's slightly stronger power output.

Verdict & recommendation

If your priority is portability and warranty coverage, the Firman W03383 is the stronger pick. It's meaningfully lighter and gives you an extra year of manufacturer support, which can save real money if something goes wrong. If your priority is maximum power from this size class, the WEN 56380i delivers more running and starting watts for situations where you're pushing closer to capacity.

Neither generator is a bad choice. They share the same fuel type, similar noise levels, and inverter technology. The differences are real but modest, so your decision should come down to how you plan to use it most often. Buyers who move their generator a lot and run lighter loads will appreciate the Firman. Buyers who stay put and need to power more demanding equipment will get more from the WEN.

Last updated March 18, 2026

  • Model W03383
    Model W03383

    Firman 3,300W Gas Generator

    3300W
    Running
    58 dB
    Noise
    View details
  • Model 56380i
    Model 56380i

    WEN 3,400W Gas Generator

    3400W
    Running
    57 dB
    Noise
    View details
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationFirman W03383WEN 56380i
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableYesYes
RV readyYesYes
Running watts
3300 W
Winner: Winner: 3400 W
Starting watts
3650 W
Winner: Winner: 3800 W
Noise (lower limit)
58 dB
Winner: Winner: 57 dB
Weight
Winner: Winner: 91 lbs
99.2 lbs
Run time @50% load
Not available
Winner: Winner: 8.5 h
Run time @25% load
9 h
Not available
Fuel tank
1.8 gal
2.2 gal
Fuel gaugeNoYes
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
23.2 x 18 x 20.1
Electrical
Voltage (AC)
120
120
Voltage (DC)
12
12
GFCI outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesYes
THD
<3% %
1.2 %
Engine
Engine
193 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
212 cc WEN OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Recoil, Electric
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
3300 W
3400 W
Starting watts
3650 W
3800 W
Running amps (120V)
Not available
Not available
Running amps (240V)
Not available
Not available
Peak amps (120V)
Not available
Not available
Peak amps (240V)
Not available
Not available
Run time @50% load
Not available
8.5 h
Run time @25% load
9 h
Not available
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
CARB, EPA
EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Not available
Floating
UPC
840876133835
44459563808
Core / High-priority specs
Running Watts (Gasoline)
3300
3400
Starting Watts (Gasoline)
3650
3800
Runtime @ 50% Load (Gasoline)
Not available
8.5
Runtime @ 25% Load (Gasoline)
9
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)
1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
OHV 4-stroke
Engine Displacement
193
212
Cylinder Sleeve
cast iron sleeve
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
9
Not available
Runtime @ 50% Load (Gasoline)
Not available
8.5
Safety & compliance
Overload Protection System
Not available
Low oil and overload protection
Low Oil ProtectionYesYes
Included equipment
Included Accessories
Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery
Funnel, tool kit, and battery
Additional specs
Summary
The Firman W03383 is a 3300-watt inverter generator built around a 193cc OHV 4-stroke engine with a cast iron sleeve. At this wattage, it can run a refrigerator, microwave, and several lights simultaneously, or power essential household circuits during an outage. The inverter technology keeps total harmonic distortion below 3%, which protects laptops, smartphones, and other sensitive electronics from voltage spikes. This unit bridges the gap between lightweight portables and mid-range backup power, making it useful for both recreational trips and emergency home backup.
The WEN 56380i is a super quiet, 3800-watt RV-ready portable inverter generator featuring a 212cc 4-stroke OHV engine, electric start, and fuel shut-off, designed to provide clean power for sensitive electronics.
  • Most Powerful
    WEN 56380i
    3400W running
  • Quietest
    WEN 56380i
    57 dB
  • Longest Runtime
    WEN 56380i
    8.5h at 50% load
Where to buy
Prices can change. We update these automatically.
Firman W03383
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WEN 56380i
Store links
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