Add aux power override for SOC predictions

Introduce a global _OVERULE_AUX_POWER (kW) to allow forcing an estimated auxiliary power load during charging. When set > 0 the code now overrides computed aux_kw in several places (power reading updates, AC charging data updates, magic SOC aux updates, and reconnection restore) so the SOC predictor uses the supplied value instead of the vehicle-reported/BMW value. Set to 0 to keep existing behavior.

Author: kvanbiesen

custom_components/cardata/coordinator.py

@@ -69,6 +69,8 @@
 # Pre-compiled regex for AC phase parsing (avoids recompilation on each message)
 _AC_PHASE_PATTERN = re.compile(r"(\d{1,2})")
 
+_OVERULE_AUX_POWER = 0.3  # kW - estimated auxiliary power load during charging (for SOC prediction) - set to zero to use bmw values
+
 
 def _descriptor_float(state: DescriptorState | None) -> float | None:
     """Extract a float from a descriptor state, returning None on failure."""
@@ -516,6 +518,8 @@ def _anchor_soc_session(self, vin: str, vehicle_state: dict[str, DescriptorState
                             aux_kw = float(aux_state.value) / 1000.0
                         except (TypeError, ValueError):
                             pass
+                    if _OVERULE_AUX_POWER > 0:
+                        aux_kw = float(_OVERULE_AUX_POWER)
                     self._soc_predictor.update_power_reading(vin, power_kw, aux_power_kw=aux_kw)
                 except (TypeError, ValueError):
                     pass
@@ -531,6 +535,8 @@ def _anchor_soc_session(self, vin: str, vehicle_state: dict[str, DescriptorState
                     aux_kw = float(aux_state.value) / 1000.0
                 except (TypeError, ValueError):
                     pass
+            if _OVERULE_AUX_POWER > 0:
+                aux_kw = float(_OVERULE_AUX_POWER)
             if voltage and current:
                 self._soc_predictor.update_ac_charging_data(vin, voltage, current, phases, aux_kw)
             else:
@@ -1049,6 +1055,8 @@ async def _async_handle_message_locked(
                             aux_kw = float(aux_state.value) / 1000.0  # Convert W to kW
                         except (TypeError, ValueError):
                             pass
+                    if _OVERULE_AUX_POWER > 0:
+                        aux_kw = float(_OVERULE_AUX_POWER)
                     self._soc_predictor.update_power_reading(vin, power_kw, aux_power_kw=aux_kw)
                     # Trigger predicted_soc and magic_soc sensor updates during charging
                     if self._soc_predictor.is_charging(vin):
@@ -1082,7 +1090,8 @@ async def _async_handle_message_locked(
                             aux_kw = float(aux_state.value) / 1000.0
                         except (TypeError, ValueError):
                             pass
-
+                    if _OVERULE_AUX_POWER > 0:
+                        aux_kw = float(_OVERULE_AUX_POWER)
                     # Delegate to predictor
                     if self._soc_predictor.update_ac_charging_data(vin, voltage, current, phases, aux_kw):
                         if self._soc_predictor.has_signaled_entity(vin):
@@ -1163,6 +1172,8 @@ async def _async_handle_message_locked(
                 if value is not None:
                     try:
                         aux_w = float(value)
+                        if _OVERULE_AUX_POWER > 0:
+                            aux_kw = float(_OVERULE_AUX_POWER)
                         self._magic_soc.update_aux_power(vin, aux_w / 1000.0)
                     except (TypeError, ValueError):
                         pass
@@ -1567,7 +1578,8 @@ async def async_handle_connection_event(self, status: str, reason: str | None =
                                         aux_kw = float(aux_state.value) / 1000.0
                                     except (TypeError, ValueError):
                                         pass
-
+                                if _OVERULE_AUX_POWER > 0:
+                                    aux_kw = float(_OVERULE_AUX_POWER)        
                                 self._soc_predictor.update_ac_charging_data(vin, voltage, current, phases, aux_kw)
                                 _LOGGER.info(
                                     "Reconnection: restored AC charging data for %s (%.1fV × %.1fA)",