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Cummins Onan P4500i Portable Generator

by Cummins
SKU Cummins-2
Original price $1,465.56 - Original price $1,465.56
Original price
$1,465.56 - $1,465.56
Current price $1,465.56

In Stock & Ready to Ship

All orders are shipped within 1-2 business days. Product ETA 7-14 business days.

Designed to go wherever you do, the Onan 4500i Portable Generator brings together efficiency, durability, and performance to ensure that you'll always have power when you need it most. At 98 lbs., this powerful, yet lightweight generator comes with wheels and a telescopic handle, making the Onan P4500i easy to manage. The P4500i features push-button and remote start with a pull-cord backup, a double-insulated case for quieter operation, and an LED display for precise readings. The fuel-efficient P4500i has a 3.4-gallon fuel tank that runs 18 hours at 25% load.

Key Features

  1. Powerful and Efficient Engine: The P4500i is equipped with a robust engine that delivers powerful performance while maintaining fuel efficiency. This makes it an excellent choice for a wide range of applications, from camping and RV trips to home backup power.

  2. Inverter Technology: Incorporating advanced inverter technology, this generator produces clean and stable power, making it safe for sensitive electronic devices. It minimizes voltage fluctuations and ensures a consistent power output, protecting your electronics from potential damage.

  3. Quiet Operation: Designed for minimal noise output, the P4500i is suitable for environments where quiet operation is crucial. Whether you're camping in serene natural settings or using it for residential backup power, the generator's low noise levels provide a user-friendly experience.

  4. Compact and Portable Design: The portable design of the P4500i makes it easy to transport and set up wherever power is needed. The compact size allows for convenient storage in tight spaces, making it an ideal choice for both outdoor activities and emergency situations.

  5. Remote Start Capability: The generator comes with a remote start feature, allowing you to conveniently start or stop the unit from a distance. This feature is especially useful in situations where immediate access to the generator is limited.

  6. Parallel Connection Capable: The P4500i is parallel-ready, enabling you to connect two generators for increased power output. This flexibility is beneficial when dealing with higher power demands or when you need to power multiple appliances simultaneously.

  7. User-Friendly Control Panel: The control panel is intuitively designed with clearly labeled functions, including start/stop controls, fuel gauge, and outlets. This ensures ease of use and quick access to essential generator functions.

  8. Multiple Outlets: The generator offers a variety of outlets, including AC sockets and DC charging ports. This versatility allows you to connect and power different types of devices simultaneously.

  9. EPA Compliant (2024): The P4500i complies with the latest EPA standards for emissions, ensuring that it meets environmental regulations while providing reliable power.

• 3.4-gallon fuel tank
• Runs 18 hours at 25% load
• Telescoping handle and wheels for easy transportation
• Dependable 7.3 HP 224cc OHV 4-stroke engine
• Push-button and remote start with pull-cord backup
• RV and camper-ready with 30A TT-30R outlet
• Two 5V USB ports for charging sensitive electronics such as phones or tablets
• Parallel capable with another P4500 inverter generator to reach 50A of power
• LED display with precise readings such as fuel level, power output, remaining run time, voltage, and lifetime run hours

In summary, the Cummins Onan P4500i Portable Generator is a feature-rich and dependable solution for those in need of a versatile and portable power source, whether for recreational activities, outdoor events, or emergency backup power.


Model Number: P4500i
Gasoline Peak Watts: 4500
Gasoline Running Watts: 3700
Peak Amps at 120V: 37.5 amps
Running Amps at 120V: 30.8 amps
AC Voltage: 120 Volts
DC Voltage: 5 Volts
AC Frequency: 60 Hz
Parallel Capable: Yes
Engine Horse Power: 7.3 HP
Total Harmonic Distortion (THD): <3%
Automatic Voltage Regulator (AVR): Yes
Starting System: Electric, Remote, Recoil
Remote Start Fob: Included
Remote Start Distance: 109 yds.
Engine Displacement: 224cc
Engine Type: OHV 4-Stroke
Engine RPM: Max 3600
Operational Volume: As low as 52 dBA
Carburetor Kit Required to Operate at Altitude: Yes, above 2000'
Recommended Oil: SAE 10W30
Oil Capacity: 20.3 oz.
Low Oil Shutdown: Automatic
Fuel Type: Unleaded Gasoline (10% Ethanol or less)
Fuel Tank Capacity: 3.4 gal.
Run Time at 25% Load: 18 hrs.
Run Time at 50% Load: 15 hrs.
AC Outlets: (1) 120V 30A (TT-30R), (1) Duplex 120V 20A (5-20R)
DC Outlets: (2) 5V USB ports
Overload Protection (circuit breaker): Yes
Handle Style: Telescoping
Emissions: EPA, CARB
Canada CSA Compliant: Yes
Wheel Kit: Included
Wheel Size: 5.5" Dia. x 1.5" Thick
Residential Warranty: 3 Years
Dimensions: 24.5"L x 18.25"W x 20.5"H
Weight: 98 lbs.

Document Library

Spec Sheet

Shipping Policy

Our goal is to get your parts and products to you as efficiently and safely as possible. The guidelines below outline what you can expect about fulfillment, shipping, and eligible products.

Shipping and Order Fulfillment Guidelines

Order Fulfillment: Orders usually ship within 1-5 business days. Shipments generally arrive in 1-3 business days after leaving our facilities. Please note that no orders will be fulfilled on Saturday or Sunday; instead, they will be fulfilled the next business day.

Pick Up: You may choose to pick-up your order at no cost from any of our listed locations in the USA and Canada. As soon as the order is ready for pick-up, we will send you an email. Your order should be ready for pickup within 2 – 3 business days, depending on the availability of parts.

Shipping Address: Your shipping address may be either a residential or commercial address in the United States and Canada. We do not ship to P.O. Box addresses, and we do not ship to any addresses outside the USA and Canada.

Method of Shipping: Standard ground shipping is the default shipping method for the USA and Canada.* Once your product is shipped, it should take 1–3 business days for delivery. Standard shipping to Alaska and Hawaii typically takes 14–21 business days.

* Exceptions may apply in shipping to some states in the USA. Currently, Build the Power does not offer shipping to US territories, Nunavut, Northwest Territories or Yukon.


Shipping Fees

Free Shipping: We offer free shipping on all orders.


Eligible Products

All products are eligible for Standard Free Shipping except for the product categories listed below. These products are eligible for Store Pick-Up Only:

Dangerous or hazardous goods, such as batteries.
Products that require special handling, such as a pail of oil or coolant.

Returns and Refunds Policy

We are committed to providing a straightforward, hassle-free return process. Please read our policy to be sure your order qualifies.

If your product was damaged in shipping, or if you received an incorrect part please contact us so that we can assist you. Do not initiate a return for such orders.

Return Guidelines

Return Initiation

Your return must be initiated on Build the Power website. Please do not take your parts to a store without initiating the return online first as your returns will not be accepted.

Return Timeline

Eligible part returns can be initiated for up to 30 days from the shipment or pickup availability date. Returns must be received by the return location within 14 days of return initiation.

Return Method

You may return products either in-store to your original pickup location, or through mail. Drop off returns are only available if you picked up your products at a branch.

In-Store Return: Available only for pickup orders. You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will then have the option to return the product(s) to your original pickup location. You will be issued a Return Confirmation email as soon as you submit your return request. Please bring a copy of the packing slip from your return order along with the products. Note: If you purchased as a signed in user, make sure to sign into your account first.

Mail-In Return: You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will be issued a Return Confirmation email as soon as you submit your return request. Include the packing slip with your parts that are being returned. 

Product Condition

Products purchased on must be returned in saleable condition — in other words, unused, in the original packaging, and undamaged. Please note, all accepted returns will incur a 15% handling fee.

Products that are Not Eligible for Return

-Superseded and obsolete products or parts.
-Parts that were not purchased through the Build the Power.
-Parts not purchased from Build the Power and non-stocking parts.
-Piston pins except as part of piston or cylinder kits.
-Electronics (including but not limited to sensors)
-Hazardous materials such as paints, sealants, flush kits, lubricants, spray cleaners and other materials.
-Consumable products.
-Make-to-Order and Customized items (calibrated fuel pumps, custom specified radiators / alternators / mufflers /adapters / etc.)
-Belts, service tools, and rebuilt or non-genuine parts.
-Printed circuit boards and other electronic components that were shipped in anti-static packaging which have been opened.

Refund Policy

Handling Fees

All accepted parts returns will incur a 15% handling fee.

Return Label

You will be responsible for shipping the return package to the appropriate location. For US returns, we recommend you ship via FedEx to avoid potential delays. If you are returning a product because an incorrect part was shipped, or the product was damaged in shipping please contact us so that we can assist you.

Refund Timeline

Once we have approved the return, a refund will be issued within 7-10 business days.


2 years factory warranty.

Free Shipping

Free shipping on all orders

In stock & ready to ship

All orders are shipped within 1-2 business days

Hassle Free Returns

Hassle free return within 30 days

Excellent Customer Service

Questions? Give us a call today (507) 636-3614

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