===== Battery Switch =====

The **Battery Switch** is accessible via the **Sidebar → Battery Switch**.\\
It allows controlled activation and deactivation of the entire battery system.

{{:mk3:screenshot2025-04-07202133.png?nolink&300|Battery Switch UI}}

==== System Start-Up ====

After booting, the BMS requires about **120 seconds** for full initialization.\\
Only after this delay the **green "Power On"** button becomes available.

''⏳ During this time, the system runs internal checks and communication initialization.''
==== Activation Flow ====

=== High Voltage Systems ===

  * When **"Power On"**  is pressed, the BMS automatically performs an **isolation test**
  * If the test passes, the **precharge sequence**  starts, followed by activation of the positive and negative relays
  * The system is now live and ready for operation

=== Low Voltage Systems ===

  * Same flow as above, **but without isolation test**
  * Relays are closed after a short delay and the inverter is powered up

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==== When System is Active ====

{{:mk3:screenshot2025-04-07202141.png?nolink&300}}

Once relays are engaged, two buttons become visible:

  * 🔴 **Emergency Stop**  Instantly disables all relays – use only in emergency situations ''⚠️ Cuts power without any shutdown process. May lead to system faults if used during operation.''
  * 🔵 **Shutdown**  Recommended method for turning the system off ''Sends a clean shutdown signal to the inverter and safely disconnects all relays afterward''

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==== Status Indicators ====

  * **State:**  Shows current switch/test state (e.g. ''Waiting'', ''Testing Isolation'', ''Ready'', ''Error'')
  * **Relays:**  Displays relay status (e.g. ''Open'', ''Closed'', ''Precharge'', ''Error'') ''🔍 Always check both values before powering on or off the system manually.''