FIRMAN · Inverter generator
W05381
6,850 starting watts and 5,500 running watts with gasoline operation.
$2,099.99
Direct price snapshot
Visual spec gallery
Core specifications, simplified.
Up to 6,850 starting watts
6,850W starting
Manufacturer runtime
10 hrs 50% load
Operating volume
67dB 25% load
Fuel tank
5.3 Gal.
123.5
Unit weight
27.5x21.3x22.6
Unit dimensions
- Warranty
- 3-year warranty
- Certifications
- CETL · EPA · PGMA
- Availability
- Sold out
Starting
Recoil
Power quality
3% THD
Safety
Low-oil shutdown
Electrical
120/240 · 60
1 × 5-20R 120V 20A DUPLEX GFCI · 1 × TT-30R 120V 30A TWISTLOCK · 1 × L14-30R 120V/240V 30A TWISTLOCK (22.1A/240V/5300W) · 1 × 14-50R 120V/240V 50A (22.1A/240V/5300W) · 1 × USB-C (3.1/5A/5/9/12/15/20V DC/60W)
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
*Available at Costco.ca Introducing the FIRMAN W05381, your power-packed companion designed for outdoor adventurers who demand excellence. With 6650/5300 Watts and 120/240V availability, this generator is your key to conquering the wild with firm confidence. Operating at a quiet 67 dB at 25% load, it lets you enjoy the quietness of the outdoors without the typical generator sound. Increase your runtime with the eco mode button, making the W05381 environmentally and economically friendly. Effortlessly parallel it with any other 5000W or greater FIRMAN inverter for limitless potential. Producing pure sine wave energy, the W05381 ensures the safe powering of your sensitive electronics and high-end electronics. Safety is a priority, with the modern CO Alert carbon monoxide shutdown feature. Whether you're an RV enthusiast, camping aficionado, tailgating pro, or DIY leader, the W05381 is your go-to choice, making it the ultimate companion for your next adventure The W05381 comes with an engine oil bottle, a funnel, a quick oil drain, a toolkit, and a 12V battery cable.
Specifications · Certifications
- EPA Certified
- Yes
- cETL Certified
- Yes
- PGMA G300-2018
- Yes
Specifications · Output
- Running Watts
- 5300
- Starting Watts
- 6650
- AC Voltage
- 120/240
- DC Voltage
- 12
- Frequency (Hertz)
- 60
- Decibels
- 67dB 25% load
- Run Time
- 10 hrs 50% load
- THD @ Full Load
- 3%
Specifications · Control Panel
- Recoil Start
- Yes
- 5-20R 120V 20A DUPLEX GFCI
- 1
- TT-30R 120V 30A TWISTLOCK
- 1
- L14-30R 120V/240V 30A TWISTLOCK (22.1A/240V/5300W)
- 1
- 14-50R 120V/240V 50A (22.1A/240V/5300W)
- 1
- USB-C (3.1/5A/5/9/12/15/20V DC/60W)
- 1
- 12V DC Power Port/Plug (8.3A/12V DC/100W)
- 1x2 Prong Angled
- Parallel Port
- Yes
- Multi-Meter
- P-V-Hr-F-Fuel Level/Oil Alert/ Over Load
Specifications · Machine
- Low Oil Shutoff
- Yes
- CO Shut Off
- Yes
- Power Stream Alternator
- Yes
- Cast Iron Sleeve
- Yes
Specifications · Fuel System
- Fuel
- Gas
- Tank Size
- 5.3 Gal.
- Steel/Plastic
- Steel
Specifications · Wheel Kit
- Wheels
- 8"-Gray-plastic-flat free
- Handle
- U shape folding handle
Packaging · Unit
- UPC
- 840876153819
- Unit Dimensions
- 27.5x21.3x22.6
- Unit Length
- 27.5
- Unit Width
- 21.3
- Unit Height
- 22.6
- Unit Weight
- 123.5
Packaging · Carton
- Carton Dimensions
- 31.5x22.8x24
- Carton Length
- 31.5
- Carton Width
- 22.8
- Carton Height
- 24
- Carton Weight
- 140
Best-fit uses
- Camping
- Home Projects
- Power Outage
- Tailgate
- Work
Standout features
- Inverter power
- Recoil start
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