FIRMAN · Inverter generator
W03386
4,125 starting watts and 3,300 running watts with gasoline, propane operation.
$1,429.99
Direct price snapshot
Visual spec gallery
Core specifications, simplified.
Up to 4,125 starting watts
4,125W starting
4,125W starting
Manufacturer runtime
9 hrs
Operating volume
58dB @ 1/4 load
Fuel tank
1.8
91 Lbs
Unit weight
23.2" x 17.8" x 17.9"
Unit dimensions
- Warranty
- 3-year warranty
- Certifications
- CARB · CETL · EPA
- Availability
- Available
Starting
Electric, Recoil, Remote
Power quality
3% THD
Safety
Low-oil shutdown · CO Alert
Electrical
120 · 60
1 × 5-20R 120V 20A DUPLEX · 1 × TT-30R 120V 30A TWISTLOCK (27.5A/120V/3300W) · 1 × USB-A (2.1A/5V DC/10W)
Official product gallery
Product views and FIRMAN infographics.
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Complete specifications
Every official field, organized.
The technical fields below come from FIRMAN’s model-specific specification file. Product photos and infographics come from the official product gallery. Confirm current documentation before purchase.
Manufacturer overview
The FIRMAN W03386 portable inverter generator delivers clean, renewable energy with quiet, fuel-efficient performance—ideal for powering sensitive electronics like laptops, smartphones, and tablets. With 4,125 starting watts and 3,300 running watts, this generator is a reliable choice for RV living, camping trips, tailgating, or recreational use. Equipped with advanced CO Alert technology and remote start, the W03386 prioritizes safety and ease of use, giving you peace of mind and convenience at the push of a button. It runs at 120V and provides up to 9 hours of runtime at 25% load, ensuring long-lasting performance on a single tank. Whether you're powering up your RV, setting up for a weekend tailgate, or looking for a portable power solution off the grid, the W03386 delivers dependable performance with whisper-quiet operation. Quiet. Efficient. Reliable. The FIRMAN W03386 is your trusted companion for portable power wherever life takes you. The W03386 comes with an engine oil bottle, oil funnel, spark plug wrench, screwdriver, 12V battery cable, remote control, floater charger, and quick oil drain.
Specifications · Certifications
- CARB Certified
- Yes
- EPA Certified
- Yes
- cETL Certified
- Yes
- NOM Certified
- No
- UL Certified
- No
Specifications · Output
- Running Watts
- 3300
- Starting Watts
- 4125
- AC Voltage
- 120
- Frequency (Hertz)
- 60
- Decibels
- 58dB @ 1/4 load
- Run Time
- 9 hrs
- THD @ Full Load
- 3%
Specifications · Control Panel
- Recoil Start
- Yes
- Electric Start
- Yes
- Remote Start
- Yes
- 5-20R 120V 20A DUPLEX
- 1
- TT-30R 120V 30A TWISTLOCK (27.5A/120V/3300W)
- 1
- USB-A (2.1A/5V DC/10W)
- 1
- 12V DC Power Port/Plug (8.3A/12V DC/100W)
- 1
- Parallel Ports
- 2
Specifications · Machine
- Low Oil Shutoff
- Yes
- Power Stream Alternator
- Yes
- Cast Iron Sleeve
- Yes
Specifications · Fuel System
- Fuel
- Gas
- Tank Size
- 1.8
- Steel/Plastic
- Plastic
Specifications · Wheel Kit
- Wheels
- 5.5"-Yellow-plastic-flat free
- Handle
- U shape folding handle
Packaging · Unit
- UPC
- 840876133866
- Unit Dimensions
- 23.2" x 17.8" x 17.9"
- Unit Length
- 23.2"
- Unit Width
- 17.8"
- Unit Height
- 17.9"
- Unit Weight
- 91 Lbs
Packaging · Carton
- Carton Dimensions
- 26.6" x 18.9" x 19.3"
- Carton Length
- 26.6"
- Carton Width
- 18.9"
- Carton Height
- 19.3"
- Carton Weight
- 104 Lbs
Best-fit uses
- Camping
- Home Projects
- Power Outage
- Work
Standout features
- Dual-fuel flexibility
- Inverter power
- CO Alert shutdown protection
- Electric, Recoil, Remote start
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