Keba Wallbox Home Assistant Charging Control – BYD Battery Load Management based on Wallbox Status
This flow optimizes the charging behavior of a BYD home battery system based on the current charging status of two EV chargers (Wallbox Garage and Wallbox Carport).
Main Goal: If one or both EVs are charging, the BYD home battery is forced into load-only mode (charging only, no discharging). If both Wallboxes are idle (no EV charging), the battery returns to its normal charging and discharging behavior.
How it works: Input Triggers: The flow listens for state changes of both EV chargers (sensor.goe_car_value for Garage and sensor.goe_car_value for Carport). It triggers whenever the state of either Wallbox changes to or from "Laden" (German for "Charging").
Charging Detection Logic: When a charger starts charging (Laden), the flow checks that the other charger is not already charging, ensuring that the battery switches to load-only mode as soon as any one charger starts.
Stop Condition (Both Wallboxes Idle): When both chargers report not charging, the flow triggers the Home Assistant script byd_charging_and_uncharging to return the BYD battery to its default behavior (charge and discharge allowed).
Home Assistant Entities Used: sensor.goe_car_value (Garage Wallbox status)
sensor.goe_2_car_value (Carport Wallbox status)
Scripts executed in Home Assistant:
script.byd_only_load → Forces battery into load-only mode
script.byd_charging_and_uncharging → Resets battery to charge/discharge mode
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