J-CE/womo-energie-zentrale ? reverse-engineered prompt

Build me a complete camper energy control system for an ESP32 S3 that works fully offline and can run without a cloud connection.

It should read battery data and solar charger data, decide when to turn things like the fridge, starter battery charger, and inverter on or off based on battery state and solar power, and protect against bad readings with safe fallback behavior. I also want a local web dashboard that opens over Wi Fi, shows live values, charts, and history from SD card logs, plus a simple way to update the firmware from the browser. Add support for Bluetooth so I can see live data and send a few commands from a phone, and make sure the device can remember settings across reboots. Use the RTC as the main clock, keep logging reliable, and include sensible watchdog and fail safe behavior. If you need to check current docs for ESP32 features or libraries, look them up online.