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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.
LEGENDARY FIRMAN ENGINEERING
- 145cc FIRMAN Engine
- Starting Watts: 4400(Gas), 4000(LPG), 3500(NG)
- Running Watts: 3500 (Gas), 3200(LPG), 2800(NG)
- 120 volts
- Electric Start
- Recoil Start
- Turbo Mode
- Super Eco Mode
- CO Alert
- Low oil shut off

PERFORMANCE IN A LEAGUE OF ITS OWN
- 1.6-gallon tank
- Up to 8 hours of run time at 25% load
- Weight: 52 lbs
- 64dB ¼ load

FEATURES YOU EXPECT FROM FIRMAN
3-year warranty
New CO alert technology
Multi-featured control panel with covered outlets
- (1) 5-20R 120V 20A
- (1) L5-30R 120V 30A TWISTLOCK
- (1) DC Power Port/Plug 8.3A/12V
- (1) USB-A 5V 3A 9V 3A 12V 2.5A
- (1) USB-C 5V 3A 9V 3A 12V 2.5A

Specifications
Certifications
| EPA Certified | Yes |
|---|---|
| cETL Certified | Yes |
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% |
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 |
Machine
| Low Oil Shutoff | Yes |
|---|---|
| Power Stream Alternator | Yes |
| Cast Iron Sleeve | Yes |
Fuel System
| Fuel | Gas |
|---|---|
| Tank Size | 1.6 Gal |
| Steel/Plastic | Plastic |
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 |
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 |