PV forecast (HKW – PV-Prognose)

Optional sensor linked to your HKW. Estimates daily PV energy (kWh) using weather data from Open-Meteo.

Capabilities

Capability	Meaning
measure_pv_forecast_baseline	PV forecast — morning freeze of the model day total (kWh)
measure_pv_forecast_adjusted	PV forecast (recalculated) — afternoon correction toward real production
measure_pv_actual_today	PV generated today from the station counter (kWh)

Titles match the Homey tile labels (not “original” / “adjusted” wording).

Configuration

Device settings:

• Up to 3 PV surfaces (kWp, tilt °, compass). Set kWp to 0 to disable a row. At least one surface required.
• Calibration / performance-ratio style hints in settings (see on-device labels)
• Location is taken from the Homey / plant context used by the forecast service

How recalculated forecast works (overview)

1. Baseline — frozen in the morning from weather × kWp × PR × calibration
2. From ~noon — hourly blend:
   \(A \approx E_{\text{actual}} + R_{\text{weather remaining}} \cdot f\)
   with \(f\) clamped, soft caps vs baseline, and evening taper toward actual production
3. Pace cap — if Open-Meteo remaining energy is too optimistic vs recent production slope, the residual is limited so Insights do not overshoot late day

Exact parameters evolve with app versions; see Release notes.

Tips

• Compare baseline vs recalculated in Homey Insights over several sunny days
• Wrong kWp/tilt/orientation will bias both series
• Needs network access for Open-Meteo (forecast only; live station data stays local RSCP)