If you’ve got one of these (common in many UK smart meters/IHDs), you know the stock firmware is… basic. But with a bit of digging:

Vestel typically releases firmware updates to address security vulnerabilities, improve connectivity stability, and add new OCPP features. While specific changelogs are often proprietary, the general lifecycle is observed as follows:

The EVC04 firmware is designed to run on an embedded Linux environment (typically ARM-based architecture). It interfaces with:

Would you like a shorter version for Reddit (r/AskElectronics or r/hardwarehacking), or a safety warning to accompany it?