FIRMAN · Portable generator
P03503
4,450 starting watts and 3,550 running watts with gasoline operation.
$789.99
Direct price snapshot
Visual spec gallery
Core specifications, simplified.
Up to 4,450 starting watts
4,450W starting
Manufacturer runtime
14hrs
Operating volume
67dB 1/2 load
Fuel tank
5
108.5
Unit weight
24.8x21.7x21.7
Unit dimensions
- Warranty
- 3-year warranty
- Certifications
- CETL · EPA
- Availability
- Available
Starting
Recoil
Power quality
25% THD
Safety
Low-oil shutdown · CO Alert
Electrical
120 · 60
1 × 5-20R 120V 20A DUPLEX · 1 × L5-30R 120V 30A TWISTLOCK · 1 × TT-30R 120V 30A RV
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 P03503 portable generator is built to handle your outdoor adventures, home improvement projects, or emergency backup power with confidence. Delivering 4,450 starting watts and 3,550 running watts, this unit is equipped with a reliable 208cc engine and a 5-gallon fuel tank, offering an impressive runtime of up to 14 hours at 50% load. Whether you're powering tools, appliances, or your RV setup, the P03503 provides consistent performance and unmatched value. The multi-feature control panel makes operation simple and efficient, while its robust build ensures long-term reliability. With the FIRMAN P03503, you get powerful, reliable performance wherever and whenever you need it. The P03503 comes with a cover, engine oil bottle, oil funnel, spark plug wrenc h, and two double open-ended wrenches (10mm x 12mm). ·
Specifications · Certifications
- CARB Certified
- NO
- EPA Certified
- YES
- cETL Certified
- YES
- NOM Certified
- NO
- UL Certified
- NO
Specifications · Output
- Running Watts
- 3550
- Starting Watts
- 4450
- AC Voltage
- 120
- Frequency (Hertz)
- 60
- Decibels
- 67dB 1/2 load
- Run Time
- 14hrs
- THD @ Full Load
- 25%
Specifications · Control Panel
- Recoil Start
- YES
- 5-20R 120V 20A DUPLEX
- 1
- L5-30R 120V 30A TWISTLOCK
- 1
- TT-30R 120V 30A RV
- 1
Specifications · Machine
- Low Oil Shutoff
- YES
- Power Stream Alternator
- YES
- Cast Iron Sleeve
- YES
Specifications · Fuel System
- Fuel
- Gas
- Tank Size
- 5
- Steel/Plastic
- STEEL
Specifications · Wheel Kit
- Wheels
- 8.0" -black -plastic-flat free
- Handle
- single folding w/grip
Packaging · Unit
- UPC
- 840876135037
- Unit Dimensions
- 24.8x21.7x21.7
- Unit Length
- 24.8
- Unit Width
- 21.7
- Unit Height
- 21.7
- Unit Weight
- 108.5
Packaging · Carton
- Carton Dimensions
- 27.2x18.1x19.9
- Carton Length
- 27.2
- Carton Width
- 18.1
- Carton Height
- 19.9
- Carton Weight
- 117
Best-fit uses
- Home Projects
- Work
Standout features
- CO Alert shutdown protection
- Recoil start
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