Cummins/Onan Onan P4500i / P4500 — Hooking Up the Battery
Installation · Electrical
For the Cummins/Onan Onan P4500i / P4500, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan Onan P4500i, Cummins/Onan P4500
Before you start
- Always connect positive cable first; disconnect negative cable first.
Parts for this job
- A058U961 Battery — Cummins/Onan Onan P4500i Amazon eBay $44.99
- A058U961 Battery — Cummins/Onan P4500 Amazon eBay $44.99
Part numbers from the service-parts lists for Cummins/Onan Onan P4500i, Cummins/Onan P4500. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Unclip battery access panel on back of unit.
- Pull down battery strap clip and unhook from mounting base.
- Lift battery, withdraw bottom-first, stand vertically.
- Clip battery quick connect to main lead inside inverter.
- Verify positive cable securely tightened to positive post.
- Insert battery top-first through access port, stand on mounting base.
- Check battery positioned correctly, cables not kinked.
- Pass strap under negative cable and over battery top, hook to base.
- Replace battery access cover.
Full service-parts list: Cummins/Onan Onan P4500i →, Cummins/Onan P4500 →
Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.