Can't connect to the BYD Battery-Box. Its Wi-Fi has disappeared. How do I wake it?

Plain explanation

From the BYD manual for the Battery-Box Premium HVS/HVM: Install the latest BYD app. Battery Wi-Fi switches off 5 h after start – press the LED button about 1 s to wake it. The rest of the checklist is below; work through it in order. Owners can do the app and visual checks; any work on the wiring is for the installer.

Steps from the source

1. Install the latest BYD app
2. Battery Wi-Fi switches off 5 h after start – press the LED button about 1 s to wake it
3. To reset Wi-Fi press the LED button 3× within 6 s
4. Connect again from the app

Source

Where installers ask this

• Batterie ungenutzt (BYD Be Connect) (r/DeutschePhotovoltaik)
• reddit.com/r/DeutschePhotovoltaik/comments/1wq5in6/
• reddit.com/r/DeutschePhotovoltaik/comments/1vjn81v/
• reddit.com/r/DeutschePhotovoltaik/comments/1mxjxdd/

General guidance based on the manufacturer's manual or the named source. Always follow the current manual for your exact model and your national code. DC and AC electrical work is for qualified installers only. Not affiliated with or endorsed by any brand named; trademarks belong to their owners.