- Charger model and serial number.
- Purchase/installation invoice and warranty terms.
- Installer details and commissioning record.
- Photos of installation, protection devices and connector condition.
- Dated error codes, session IDs and videos.
- Tests performed and their results.
Ask the manufacturer to state the diagnosis, whether the claim is accepted, and who bears removal, labour, transport and reinstallation costs. “Part covered under warranty” does not automatically answer labour or logistics.