Onan P4500i Portable Inverter Generator

Built for mobility without compromise, the Onan P4500i Portable Inverter Generator delivers dependable power in a compact, travel-ready design. Whether you’re powering an RV, campsite, tailgate, or critical electronics, this inverter generator combines quiet operation, long runtime, and advanced control features in one rugged package.

Despite its impressive output, the P4500i remains easy to move thanks to integrated wheels and a telescoping handle. At just under 100 lbs., it’s designed to go where traditional generators can’t — without sacrificing performance.

The P4500i is powered by a durable 224cc 4-stroke OHV engine and features electric start with remote key fob convenience, plus a recoil backup for added reliability. A fully enclosed, double-insulated housing helps keep operating noise low, while the onboard LED display provides real-time system information at a glance.

With inverter technology delivering clean power at less than 3% total harmonic distortion, the P4500i is safe for sensitive electronics like laptops, phones, and tablets — making it ideal for both recreation and emergency backup.

Key Features

• 4,500 peak watts / 3,700 running watts of clean inverter power

• Long runtime with a 3.4-gallon fuel tank (up to 18 hours at 25% load)

• Quiet operation as low as 52 dBA

• Push-button electric start with remote start fob and recoil backup

• Telescoping handle and wheel kit for easy transport

• RV-ready 30A TT-30R outlet

• Parallel capable — connect two units to increase available power

• LED display shows fuel level, load, voltage, runtime, and total hours

• Low oil shutdown and overload protection for added safety

Ideal For

• RVs and campers

• Tailgating and outdoor events

• Jobsite and mobile power

• Home backup for essential circuits

• Sensitive electronics and appliances

Technical Specifications

Model: P4500i
Peak Output: 4,500 watts
Running Output: 3,700 watts
Voltage: 120V AC / 5V DC
Frequency: 60 Hz
Engine: 224cc OHV 4-Stroke
Horsepower: 7.3 HP
Starting System: Electric, Remote, Recoil
Fuel Type: Unleaded gasoline (10% ethanol max)
Fuel Capacity: 3.4 gallons
Runtime:

• 18 hrs @ 25% load

• 15 hrs @ 50% load
  Noise Level: As low as 52 dBA
  THD: <3%
  Outlets:

• (1) 120V 30A TT-30R

• (1) 120V 20A duplex (5-20R)

• (2) 5V USB ports
  Parallel Capable: Yes
  Dimensions: 24.5" L × 18.25" W × 20.5" H
  Weight: 98 lbs
  Emissions: EPA & CARB compliant

Features & Benefits

• Remote start with push button and pullcord backup

• Quiet operation due to double insulation

• Wheels and telescoping handle for easy transportation

• 12.5 hours of run time at 25% load - Gas

• 15 hours of run time at 25% load - Propane

• Dependable 224cc OHV 4-Stroke engine

• 3-Year Residential Warranty/ 1-Year Commercial Warranty

• Dust covers for outlets keep them clean

• LED Display

• Neighbor-friendly, quiet operation (as low as 52 dBA)

• AC Outlets: (1) 120V 30A (TT-30R), (1) Duplex 120V 20A (5-20R)

• DC Outlets: (2) 5V USB ports

• Emissions: EPA

Specifications 

Warranty

3 year limited warranty