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spot-price

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Self-hosted energy monitoring, cost tracking and smart automation for Shelly EM / 3EM. Flask web app with 23 dashboards, dynamic spot tariffs, real ENTSO-E CO₂ intensity, PV/solar, NILM appliance detection, MQTT/Home Assistant, InfluxDB/Prometheus, iOS widget. No cloud, no subscription.

  • Updated Apr 14, 2026
  • Python

Forecasts of the power market prices before the day-ahead market closure time are prone to significant error. I predict whether the day ahead (PTF in Turkish) or balancing (standard marginal price (SMF in Turkish)) will be higher at a given hour next day. It creates decisive forecasts for reducing the balancing cost.

  • Updated Aug 4, 2025

ESP32 + ESPHome firmware that fetches day-ahead electricity spot prices from the Energy-Charts API and exposes them as Home Assistant sensors. No token, no subscription. Supports 15-min and hourly resolution, NVS persistence, auto-retry, DST-safe, and any Energy-Charts bidding zone.

  • Updated Apr 7, 2026
  • C++

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