Looking for more information about the 9 August power cut?

See our interim technical report and other ESO resources.


These pages contain details about the charges that users of the electricity transmission system have to pay, how they are calculated and what changes are currently being considered by the industry.

We do not charge household consumers directly. Please contact your supplier for any domestic queries.

The charges

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Balancing Services Use of System (BSUoS) charges

BSUoS recovers the cost of day-to-day operation of the transmission system. These charges apply to suppliers and generators.

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Transmission Network Use of System (TNUoS) charges

TNUoS recovers the cost of installing and maintaining the transmission system. These charges apply to suppliers and generators.

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Electricity connection charges

Connection Charges recover the cost of installing and maintaining connection assets.

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Assistance for Areas with High Electricity Distribution Costs (AAHEDC)

AAHEDC charges recovers assistance costs for The North of Scotland which is currently the only area specified to receive assistance. These charges apply to suppliers.

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Connection and Use of System Code (CUSC)

The CUSC is the contractual framework for connection to, and use of, the National Electricity Transmission System (NETS).

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Charging guidance

Includes open letter consultations and guidance, charging methodology policy decisions, electricity industry information guides, and Triads data.

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