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
Product specs
- Dimensions
- 25.5 x 18.12 x 20.5 in
- Weight
- 105 lbs
- Key specs
- Starting watts: 4500 (gas) / 4050 (LP) Running watts: 3700 (gas) / 3330 (LP) Fuel: Dual fuel (gasoline / propane) Run time: 12.5 hrs @ 25% / 8.2 hrs @ 50% (gas) Engine: 224cc
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. Typically ships in less than 2 weeks.
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. Typically ships in less than 2 weeks.
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.