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Firman W03081 vs A-iPower SUA4300i

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

  • Model SUA4300i
    Model SUA4300i

    A-iPower 3,450W Gas Generator

    3450W
    Running
    62 dB
    Noise
    View details
  • Model W03081
    Model W03081

    Firman 3,000W Gas Generator

    3000W
    Running
    58 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 @25%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationA-iPower SUA4300iFirman W03081
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableYesYes
RV readyNoYes
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 gaugeYesNo
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 outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
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
GasolineNot availableNot 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 arrestorYesYes
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 ProtectionNoYes
Carbon Monoxide MonitoringYesNo
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 Powerful
    A-iPower SUA4300i
    3450W running
  • Quietest
    Firman W03081
    58 dB
  • Longest Runtime
    h at 50% load
Where to buy
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A-iPower SUA4300i
Store links
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Firman W03081
Store links
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