Welcome to ESO

We are the electricity system operator for Great Britain, making sure that Great Britain has the essential energy it needs by ensuring supply meets demand every second of every day. 

Find out what we do

Landscape dam with water and glowlines

Markets Roadmap 2023

The roadmap sets out our market design objectives, principles and plans to reform and evolve our markets.

It details our vision for response, reserve, thermal, voltage, stability, and restoration markets as well as the Balancing Mechanism. 

Parent and child in winter clothing

Our Demand Flexibility Service

Creating more flexibility on our electricity system is vital for running a clean, green and fair system of the future. 

Last year we launched a new Demand Flexibility Service for winter, which incentivised consumers and businesses to reduce their power consumption at certain times.

Wind turbines in the sunset with glowlines

Great Britain's monthly electricity stats

Ever wonder how much electricity is generated and used in Great Britain?

Find out about Great Britain's electricity generation and how much came from sources such as wind, solar and biomass in our monthly snapshot. 

Our control room experts continue to balance supply and demand second by second as we move into the spring months – and you can follow the electricity mix live in our carbon intensity app - available on Google Play Store and The App Store.


Keen to learn more about how we balance the grid? See our latest stories below.