Home Assistant and MQTT
Getting the controller's values into a system you already run.
Home Assistant is an app in the store, and MQTT is one of the protocols the platform speaks. Between them, a system you already run can see what the controller measures and decides.
evcc is in the store too, for installations already built around it.
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Topics, entity names and the discovery mechanism — the details that decide whether an integrator can wire this up in an afternoon. Needs the actual MQTT schema.