Generac iQ5200
3900 W, dual-fuel
Cummins Onan P4500i
Generator · Onan. Specs from the manufacturer page (checked ).
The Onan P4500i is a 4,500-Watt digital inverter gasoline portable generator rated at 3,700 running watts and 4,500 peak watts. It has a 3.4-gallon steel fuel tank, a 30A TT-30R RV-ready outlet, and a 224cc Cummins Onan engine with an operational volume as low as 52 dBA.
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Running
3700W
Peak / surge
4500W
Fuel
gasoline
Run time @50 %
15h
Weight
44kg
Warranty
3yr
Key features
- 3,700 running watts and 4,500 peak watts at 120 volts, 60 Hz
- One 120V 30A TT-30R RV-ready outlet and one duplex 120V 20A (5-20R) outlet
- Two 5V USB ports
- 3.4 gal (12.8 L) fuel tank; runs 18 hrs at 25% load and 15 hrs at 50% load
- Push button and remote start (remote fob included, range 109 yd / 100 m), with pull cord backup
- Parallel capable with another P4500i, P4500iDF, or P2500i
- Automatic low oil shutdown and circuit breaker overload protection
What it is for
- RV
- camper
Specifications
| Running watts | 3700 W |
|---|---|
| Peak / surge | 4500 W |
| Fuel | gasoline |
| Tank | 12.8 L (3.4 gal) |
| Run time at 50 % load | 15 h |
| AC output voltage | 120 volts |
| Weight | 44 kg (97.0 lb) |
| Dimensions | 62.2 × 46.4 × 52.1 cm (24.5 × 18.3 × 20.5 in) |
| Warranty | 3 years |
From the Cummins page. Values the manufacturer does not publish are left out.
What is in the box
- Battery
- Battery charger
- Remote start fob (paired at factory)
- Wheel kit (assembled)
- .63 qt / 20.3 oz oil bottle
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Cummins Onan P4500i comparisons
- Onan P4500i vs Generac iQ5200
- Onan P4500i vs WEN GN5602X
- Onan P4500i vs WEN DF480iX
- Onan P4500i vs WEN DF475T
- Onan P4500i vs Anker SOLIX Smart Generator 5500
Connection and wiring
Follow the diagrams in the Cummins manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
Open the Cummins manual (PDF) →
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| LOW OIL LED | Low engine oil level stopped the generator. The low oil LED indicates this condition. | If the low oil LED is illuminated, turn the battery switch to OFF. Add engine oil. Check the engine oil level if the engine starts and then shuts down. | 25 |
| OVERLOAD LED | Generator is overloaded. With the OVERLOAD LED on and the OUTPUT READY LED off, there is no power at the AC receptacles. The generator may also run rough or bog when a load is applied. | Check the AC load and unplug some devices. Check the air inlet. Stop and restart the engine. If an AC circuit breaker has tripped, check the AC loads and reset the breaker. Replace or repair any faulty tool or appliance, then stop and restart the engine. | 25 |
From the Cummins manual. All 2 Onan P4500i codes →
FAQ
How long does the Cummins Onan P4500i run on a tank?
The maker rates it at 15 hours at 50 % load (about 1,850 W) on a 3.4-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Cummins Onan P4500i start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 4500 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.