National Grid ESO
Open data from Great Britain’s Electricity System Operator.
Read docs Updated 2026-06-18
What is National Grid ESO?
National Grid ESO supplies open datasets from Great Britain’s Electricity System Operator.
Useful for developers and analysts building geo-weather applications that incorporate electricity system data for Great Britain.
What you can build with National Grid ESO
Build UK electricity demand dashboards
Develop real-time visualizations of national and regional demand using ESO's demand datasets to monitor grid load patterns.
Create renewable generation trackers
Integrate generation mix data to show live wind, solar and other source contributions for apps focused on clean energy progress.
Power carbon intensity tools
Use ESO data feeds to calculate and display regional carbon intensity for consumer apps or EV charging optimizers.
Get started with National Grid ESO
- 1Visit the National Grid ESO data portal
- 2Browse available datasets and API endpoints
- 3Review documentation for data formats and update frequencies
- 4Make direct HTTPS requests to public endpoints
- 5Parse JSON or CSV responses into your application
National Grid ESO: pros & cons
Pros
- +Completely free with no authentication
- +HTTPS access to authoritative GB grid data
- +Regular updates on demand and generation
- +Broad coverage of electricity system metrics
Cons
- –Limited to Great Britain only
- –Electricity-sector focus with no weather layers
- –No guaranteed SLA for uptime
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Frequently asked questions
It provides open access to datasets published by Great Britain’s Electricity System Operator covering demand, generation and system status.
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