Porssisahkon.fi tracks real-time electricity spot prices in Finland — hourly and quarter-hour (vartti) intervals, powered by official Nord Pool data via ENTSO-E. Features: ⚡ Live spot price in snt/kWh 📅 Today & tomorrow's hourly prices ⏱️ 15-min quarter-hour pricing 🧮 Free electricity cost calculator 🚗 EV charging calculator ☀️ Solar savings calculator 📊 Contract comparison (Tibber, Helen, Oomi) 🏙️ City-specific prices (20+ Finnish cities) 100% free. No signup.