Cummins Onan P4500idf Portable Inverter Generator — 49-State Model (Not for Sale in California)
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At a glance
- Running Watts (Gas)
- 3,700 W
- Peak Watts (Gas)
- 4,500 W
- Running Watts (Propane)
- 3,330 W
- Peak Watts (Propane)
- 4,050 W
- Fuel
- Dual Fuel - Gasoline (87-93 octane) or Propane (LP)
- Engine
- Cummins Onan 224cc OHV 4-stroke
- Tank Capacity
- 3.4 gal (12.8 L) gasoline
- Runtime (Gas)
- 15.6 hrs at 25% load; 10 hrs at 50% load
- Runtime (Propane)
- 16.9 hrs at 25% load (20 lb tank)
- Noise Level
- As low as 52 dBA
- THD
- Less than or equal to 3%
- Outlets
- (1) 120V 30A TT-30R, (1) Duplex 120V 20A (5-20R), (2) 5V USB
- Start Type
- Electric, remote (key fob, 99 ft range), recoil backup
- Voltage / Frequency
- 120V AC, 60 Hz
- Weight
- 104.7 lb (48 kg) dry
- Dimensions (HxWxL)
- 20.5 x 18.1 x 25.5 in
- Parallel Capable
- Yes (with P4500i or P2500i)
- Emissions
- EPA (not for sale in California); CSA compliant
- Warranty
- 3-year limited residential / 1-year comprehensive commercial
Why this generator
- Dual fuel flexibility - switch between gasoline and propane with the flip of a switch, 3,700 running watts on gas or 3,330 on propane
- Clean inverter power with THD of 3% or less, safe for sensitive electronics like phones, tablets, and laptops
- Three start options: push-button electric start, remote key fob (99 ft range), plus recoil pull-cord backup
- RV- and camper-ready with a 30A TT-30R outlet, duplex 120V 20A receptacle, and two 5V USB ports
- Quiet operation as low as 52 dBA with economy mode, plus long runtime up to 15.6 hrs on gas at 25% load
- Lightweight and portable at 104.7 lbs with a telescoping handle and included wheel kit; parallel-capable for extra power
Everything you need to know
The Cummins Onan P4500idf is a 4,500-watt portable inverter generator built for real-world power on the move — camping and RVs, tailgating, the jobsite, and emergency home backup for the essentials when the grid drops.
Clean Inverter Power for Sensitive Electronics
Inverter technology produces clean, stable sine-wave power (low total harmonic distortion) that's safe for laptops, phones, TVs, and other sensitive electronics — power a conventional open-frame generator can't guarantee. It also runs quieter and lighter than conventional units of similar output.
Dual-Fuel: Gasoline or Propane
The P4500idf runs on gasoline or propane, so you're never stuck without power. Propane stores indefinitely and burns clean for emergency standby; gasoline gives you quick power anywhere. Switch fuels with a simple selector.
Ready When You Need It
With 4,500 starting watts, the P4500idf comfortably powers what matters in an outage — refrigerator or freezer, lights, fans, phone and laptop chargers, a window AC or sump pump — and on a job it keeps tools running where there's no outlet. Genuine Cummins Onan build quality means it starts when you ask it to, year after year.
Please note: this is the 49-state model and is not certified for sale in California.
Genuine Cummins Onan, Shipped Free
This is a genuine Cummins Onan portable, backed by the Cummins factory warranty. Total Generator Pros ships it free within the contiguous United States, with real generator experts a phone call away before or after the sale.
- 4,500 starting watts
- Inverter technology — clean, electronics-safe power
- Dual-fuel: gasoline or propane
- 49-state model (not for sale in California)
- Genuine Cummins Onan — factory warranty
- Free shipping (contiguous US)
- Part Number: A074Z437
Frequently asked questions
Does the price include installation?+
No — the online price covers the unit shipped free to the lower 48. Professional installation is available in NC & SC on a quote basis; outside that area we'll help you find a qualified local installer.
How fast does it ship?+
Free curbside / liftgate shipping to the contiguous 48 states. Most orders leave the warehouse in 3–5 business days.
What warranty is included?+
5-year limited factory warranty, registered and supported directly through Cummins.
Is financing available?+
Yes — 0% APR financing is available on qualifying orders. Ask us for details before checkout.
Free curbside shipping
Liftgate delivery to the lower 48. Most orders leave the warehouse in 3–5 business days.
Install help, no upsell
We size, spec, and connect you with a vetted local installer — or talk your contractor through it for free.
Real Cummins warranty
Full 5-year limited warranty — registered and supported through Cummins directly.