FIRMAN · Inverter generator
WT03571
4,400 starting watts and 3,500 running watts with gasoline, propane, natural gas operation.
$1,129.99
Direct price snapshot
Visual spec gallery
Core specifications, simplified.
Up to 4,400 starting watts
4,400W starting
4,000W starting
3,500W starting
Manufacturer runtime
8hrs at 1/4 load
Operating volume
64dB at 1/4 load
Fuel tank
1.6 Gal
52 lbs
Unit weight
18.3" x 12.7" x 18.2"
Unit dimensions
- Warranty
- 3-year warranty
- Certifications
- CETL · EPA
- Availability
- Available
Starting
Recoil
Power quality
3% THD
Safety
Low-oil shutdown · CO Alert
Electrical
120 · 60
1 × 5-20R 120V 20A SINGLE · 1 × L5-30R 120V 30A TWISTLOCK · 1 × USB C 5V 3A 9V 3A 12V 2.5A · 1 × USB A 5V 3A 9V 3A 12V 2.5A
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 WT03571 Tri-Fuel Inverter Generator delivers 4,125 starting watts and 3,300 running watts of clean, stable power, making it ideal for RV use, camping, and home backup. With the flexibility to run on gasoline, propane, or natural gas, it adapts to your needs wherever you are. It is designed to ensure efficient, dependable operation for handling demanding appliances and sensitive electronics. Its compact 1.6-gallon fuel tank provides up to 8 hours of runtime at 50% load on gasoline, while its lightweight 52-pound design makes it easy to transport. Parallel capability allows you to connect a second unit for increased output, and it includes an L5-30P to TT-30R adapter for convenient RV connection. Built-in CO Alert adds an extra layer of security. Compact, flexible, and reliable, the FIRMAN WT03571 delivers powerful inverter performance wherever your next adventure—or emergency—takes you. The WT03571 comes with an LPG/NG Regulator, a 12V Battery Cable, an Adaptor L5-30P to TT-30R, Engine Oil, an Oil Funnel, and a Tool Kit
Specifications · Certifications
- EPA Certified
- Yes
- cETL Certified
- Yes
Specifications · Output
- Starting Watts
- 4400(Gas) 4000(LPG) 3500 (NG)
- Running Watts
- 3500(Gas) 3200 (LPG) 2800 (NG)
- AC Voltage
- 120
- DC Voltage
- 12
- Frequency (Hertz)
- 60
- Decibels
- 64dB at 1/4 load
- Run Time
- 8hrs at 1/4 load
- THD @ Full Load
- 3%
Specifications · Control Panel
- Electric Start
- Yes
- Recoil Start
- Yes
- 5-20R 120V 20A SINGLE
- 1
- L5-30R 120V 30A TWISTLOCK
- 1
- DC 8.3A 12V
- 1
- USB C 5V 3A 9V 3A 12V 2.5A
- 1
- USB A 5V 3A 9V 3A 12V 2.5A
- 1
- Parallel Ports
- 1
- CO Alert
- Yes
Specifications · Machine
- Low Oil Shutoff
- Yes
- Power Stream Alternator
- Yes
- Cast Iron Sleeve
- Yes
Specifications · Fuel System
- Fuel
- Gas
- Tank Size
- 1.6 Gal
- Steel/Plastic
- Plastic
Specifications · Wheel Kit
- Handle
- Fixed Handle
Packaging · Unit
- UPC
- 840876135716
- Unit Dimensions
- 18.3" x 12.7" x 18.2"
- Unit Length
- 18.3"
- Unit Width
- 12.7"
- Unit Height
- 18.2"
- Unit Weight
- 52 lbs
Packaging · Carton
- Carton Dimensions
- 21.1" x 14.9" x 20.1"
- Carton Length
- 21.1"
- Carton Width
- 14.9"
- Carton Height
- 20.1"
- Carton Weight
- 62 lbs
Best-fit uses
- Camping
- Home Projects
- Power Outage
- Tailgate
- Work
Standout features
- Tri-fuel flexibility
- Inverter power
- CO Alert shutdown protection
- Recoil start
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