
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
| Specification | Firman W03383 | WEN 56380i |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | Yes | Yes |
| 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 gauge | No | Yes |
| 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 outlets | No | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| 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 | ||
| Gasoline | Not available | Not 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 arrestor | Yes | Yes |
| 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 Protection | Yes | Yes |
| 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 PowerfulWEN 56380i3400W running
- QuietestWEN 56380i57 dB
- Longest RuntimeWEN 56380i8.5h at 50% load


