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

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Connections Reform

We have published our final Connections Reform recommendations. We will now start a detailed process design and implementation phase, to conclude in January 2025.

Join us in Birmingham on 12 December or online on 14 December to discuss these proposals.  

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Regional Energy Strategic Planner (RESP) role

Ofgem has announced that the Future System Operator (FSO) will be taking on a new role as the RESP to ensure energy networks are regionally coordinated across fuel vectors and between geographies.

Balancing the Grid - Interactive game

To give you some insight into the world of balancing the grid, we’ve developed a game where you can attempt to keep the grid stable while facing some of the challenges our control room operatives experience daily.

Demand Flexibility Service

Our Demand Flexibility Service is back - enabling households and businesses to earn rewards for shifting electricity usage outside of peak demand hours this winter.

Future System Operator

Join our webinars on 11 December or 13 December to hear our plans to become the independent, whole energy, Future System Operator (FSO) and the role you can play in achieving a net-zero energy system.

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Great Britain's monthly electricity stats

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

See 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 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.