
Firman W03081 vs A-iPower SUA4300i
Firman W03081 is quieter with longer runtime, while A-iPower SUA4300i is lighter with higher surge watts for bigger startup loads.
- A-iPower SUA4300i
- Firman W03081
Comparison Overview
The biggest real-world difference is portability versus steady, quiet endurance. The A-iPower SUA4300i weighs 52.9 lb and delivers 3450 running watts with 4300 starting watts, which helps when motors and compressors kick on. The Firman W03081 is heavier at 84 lb, but it runs quieter at 58 dB and is tuned more for low-noise, longer sessions.
On fuel use, the Firman’s 10 hours at 25% load is a meaningful edge for overnight camping, tailgates, or stretching a tank during an outage. The A-iPower is rated 7.5 hours at 25% load, which is still solid, but you may refuel sooner if you are running it for long blocks.
Both are gasoline inverter generators, so they are generally a better fit for sensitive electronics than traditional open-frame units, and both include a 3-year warranty. Noise is close, but the Firman’s lower rating can matter in campgrounds or close neighbors.
Pick the A-iPower if you want more power in a lighter package, and the Firman if you value quieter operation and longer run time more than weight.
Key takeaways
- A-iPower SUA4300i: **4300 starting watts** helps with higher startup loads and tools.
- Firman W03081: quieter at **58 dB** versus 62 dB for the A-iPower.
- Firman W03081: **10 hours at 25% load** for longer overnight runs.
- A-iPower SUA4300i: much lighter at **52.9 lb** versus 84 lb for Firman.
- Both: gasoline inverter generators with **3-year warranty** for electronics-friendly power.
Best use cases
Choose the Firman W03081 if you want a calmer, longer-running generator for situations where you set it down and let it work. At 58 dB and 10 hours at 25% load, it is a strong fit for camping, tailgating, and overnight use where noise and refueling frequency are the main annoyances. For home backup, its 3000 running watts and 3300 starting watts can cover essentials like a refrigerator, lights, internet gear, and battery chargers, especially if you manage loads and avoid stacking multiple high-start appliances at once. The tradeoff is the 84 lb weight, which is noticeable if you are lifting it in and out of a vehicle or moving it around a property.
Choose the A-iPower SUA4300i if you prioritize easier carrying and extra startup headroom for “hard to start” loads. At 52.9 lb, it is much more manageable for solo loading, RV trips, and moving between a garage and a backyard during an outage. Its 4300 starting watts can be helpful for tools, a small air compressor, or appliances with a bigger startup spike, even though its 3450 running watts still requires you to be realistic about what you run simultaneously. The tradeoffs are a bit more noise at 62 dB and a shorter 7.5-hour runtime at 25% load, so it may be less ideal for quiet hours or long overnight stretches without refueling.
In short, the Firman leans toward quiet, longer sessions, while the A-iPower leans toward lighter weight and stronger surge capability.
Verdict & recommendation
If your priority is maximum portability with stronger startup power for motors and tools, the A-iPower SUA4300i is the better match on paper, thanks to 52.9 lb weight and 4300 starting watts. If your priority is quieter operation and fewer fuel stops during long runs, the Firman W03081 stands out with 58 dB noise and 10 hours at 25% load.
Both being gasoline inverter generators with a 3-year warranty means either can serve well for camping, RV support, or basic home backup, as long as you size your expectations to the wattage. The practical choice comes down to whether you will move it often (favor the A-iPower) or run it for long, quieter stretches (favor the Firman).
Last updated February 23, 2026
| Specification | A-iPower SUA4300i | Firman W03081 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | No | Yes |
| Running watts | Winner: Winner: 3450 W | 3000 W |
| Starting watts | Winner: Winner: 4300 W | 3300 W |
| Noise (lower limit) | 62 dB | Winner: Winner: 58 dB |
| Weight | Winner: Winner: 52.9 lbs | 84 lbs |
| Run time @50% load | Not available | Not available |
| Run time @25% load | 7.5 h | Winner: Winner: 10 h |
| Fuel tank | 1.6 gal | 1.8 gal |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 22 x 14.4 x 20.3 in | 23.2 x 17.8 x 17.9 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 12 | 12 |
| GFCI outlets | No | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | 3 % |
| Engine | ||
| Engine | 149 cc OHV 4-stroke | Firman Max-Pro Series OHV 4-stroke, cast iron sleeve |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3450 W | 3000 W |
| Starting watts | 4300 W | 3300 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 | Not available |
| Run time @25% load | 7.5 h | 10 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | Floating |
| UPC | 850016881847 | 840876130810 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3450 | 3000 |
| Starting Watts (Gasoline) | 4300 | 3300 |
| Runtime @ 25% Load (Gasoline) | 7.5 | 10 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R)1x 120V 30A (L5-30R) | 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 | 149 | 171 |
| Cylinder Sleeve | Not available | cast iron sleeve |
| Engine Oil Type | Not available | See 'Add Engine Oil' Section |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 7.5 | 10 |
| Controls & display | ||
| Display Type | Digital | Not available |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | No | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, RV adapter, and battery charging cables | Oil, funnel, tool kit, and battery charging cables |
| Warranty & identification | ||
| Commercial Warranty | 3 | 3 |
| Additional specs | ||
| Summary | The A-iPower SUA4300i is a 3,450-watt inverter generator built for users who need portable backup power without sacrificing portability. At 52.9 lbs, this gasoline-powered unit bridges the gap between job site tools and home emergency backup. The 4,300-watt peak output handles starting surges on refrigerators, air compressors, and power tools, while the 3,450-watt running capacity sustains them once they spin up.
With a 1.6-gallon fuel tank, the SUA4300i runs 7.5 hours at 25 percent load, meaning a full tank covers a full workday or overnight outage without refueling. The recoil start system is simple and reliable, though it requires manual pulling. At 62 dB, the noise level sits at normal conversation volume, making it acceptable for residential neighborhoods and campgrounds where quieter operation matters. | The Firman W03081 is a 3000-watt gasoline inverter generator built around a 171cc OHV 4-stroke engine with cast iron sleeves. At this wattage, it powers mid-range household loads: refrigerators, window air conditioners, microwave ovens, and power tools. It will not run a whole-home air conditioning system or large workshop equipment, but it handles the essentials during outages or outdoor work. The inverter technology keeps total harmonic distortion at 3 percent, which means laptops, televisions, and phone chargers stay safe from voltage spikes. Because it runs on gasoline and includes a wheel kit, users can move it between a campsite, a job site, or a garage without needing permanent installation. |
- Most PowerfulA-iPower SUA4300i3450W running
- QuietestFirman W0308158 dB
- Longest Runtimeh at 50% load


