Green Wattch

UK electricity, right now.

Track live carbon intensity, see how the national grid is generating electricity, compare your region and find your cleanest moment to use energy - updated frequently from the National Grid ESO.

Carbon Intensity API by National Grid ESO

Green Wattch

Real-time UK electricity generation and carbon intensity data, updated every 20 minutes.

My GitHub Avatar@rezelute Support on Ko-fi

Green Wattch is a free, independent project that respects your privacy. If you find it useful, consider a small tip. Unfortunately, I can't get coins by jumping into blocks 🍄🪙.

Data

Powered by the Carbon Intensity API by National Grid ESO - half-hourly generation mix and intensity forecasts for Great Britain.

Privacy

Your location or postcode is never stored in any database or shared with third parties. Privacy is taken seriously across all Code Rez apps.

Analytics by Umami - cookie-free, no personal data collected, EU-hosted.

© 2026 Code Rez · Green Wattch