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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Decarbonise Great Britain together

Join our upcoming webinars to hear about NESO’s new responsibilities, how they will evolve, and how we can work together to deliver a net zero energy system that balances sustainability with affordability and security.

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Operability Strategy Report

Find out about the system operation challenges we expect to face out to 2035, and our strategy to meeting them, as the electricity system and industry continues to decarbonise.

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Connections Reform

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

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.

Power cut in your area?

Experiencing a power cut? Find out what to do and who to contact.

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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.