Energiöversikt — Swedish Energy Dashboard

An interactive energy data platform for Sweden combining real-time electricity prices, weather-driven solar/wind estimation, EV charging optimization, and price forecasting via linear regression.

Features

• Map of Sweden — Interactive MapLibre map with zone-based price coloring across the four bidding zones (SE1–SE4)
• Price dashboard — Live Nord Pool day-ahead prices with 24-hour curves and weekly history
• EV charging optimizer — Compute the cheapest charging schedule based on user parameters (battery, charger, solar panels, grid tariff)
• Solar production estimation — Estimate solar panel output using Open-Meteo irradiance data
• Price forecast — Linear regression model trained on historical prices and weather to predict day-ahead prices

Architecture

frontend/          Vue 3 + TypeScript + Vite + MapLibre GL JS
backend/           Python FastAPI + SQLite

Data sources:

• Nord Pool — Day-ahead electricity spot prices via ENTSO-E / Utilitarian Spot
• Open-Meteo — Weather forecasts, solar irradiance, wind, historical weather (ERA5)

Quick Start

Backend

cd backend
python -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
uvicorn app.main:app --host 0.0.0.0 --port 8000

On first start, the backend bootstraps 3 years of historical prices and weather (may take a minute). Subsequent starts use cached data.

A midnight maintenance job runs automatically to retrain the price forecast model and clean up old data.

Frontend

cd frontend
npm install
npm run dev

Docker

docker build -t energioversikt .
docker run -p 8000:8000 energioversikt

The combined Docker image serves the built frontend as static files from the backend.

Testing

cd backend
pytest

API Endpoints

Method	Path	Description
GET	/api/health	Health check
GET	/api/prices/current	Current 24h prices for all zones
GET	/api/prices/history/{zone}	Historical prices by year/month/day (requires year query param, optional month/day)
GET	/api/prices/zones	Zone metadata
GET	/api/weather/forecast	Weather forecast (requires lat/lon query params)
GET	/api/weather/history	Historical weather (requires lat/lon/start_date/end_date query params)
GET	/api/solar/forecast	Solar panel output estimate (requires lat/lon query params)
POST	/api/optimize/charging	Optimal EV charging schedule
POST	/api/historical/bootstrap	Bootstrap 3 years of historical prices and weather
POST	/api/historical/calibrate	Run price forecast calibration
GET	/api/historical/calibrate/{zone}	Trained model coefficients
POST	/api/historical/store-today	Store today's prices

Environment Variables

All settings are prefixed with ENERGI_ and are optional:

Variable	Default	Description
ENERGI_UTILITARIAN_BASE_URL	https://spot.utilitarian.io	Nord Pool price API base URL
ENERGI_OPENMETEO_BASE_URL	https://api.open-meteo.com/v1	Open-Meteo weather API base URL
ENERGI_OPENMETEO_ARCHIVE_URL	https://archive-api.open-meteo.com/v1	Open-Meteo historical weather API base URL
ENERGI_CACHE_DB	data/cache.db	SQLite cache path
ENERGI_PRICE_CACHE_TTL_MINUTES	5	Price cache lifetime
ENERGI_WEATHER_CACHE_TTL_MINUTES	30	Weather cache lifetime
ENERGI_EUR_TO_SEK_FALLBACK	11.0	Fallback FX rate

Configuration

• Electricity tax, VAT rate, and grid tariff models are in backend/app/data/grid_tariffs.py
• Zone coordinates are in backend/app/data/zone_coords.py
• Supported grid tariffs: vattenfall_flat, vattenfall_tou