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Distribution / SSEN / Site

WITNEY BYPASS - 150MW BESS

At COWLEY GSP

SSEN Embedded Capacity Register, September 2026 edition

Site, company and substation names are shown as they appear in the registers, including capitalisation.

Target energisation date
30 Nov 2038
Status
Accepted to connect
Customer
Not stated
Site name
WITNEY BYPASS - 150MW BESS
Address
LAND ON THE NORTH AND SOUTH OF THE A40, WITNEY BYPASS, WITNEY, OXFORDSHIRE, OX29 7UJ
Grid reference
Easting 435773, northing 207776
Licence area
Southern England (SEPD)
Grid supply point
COWLEY GSP
Bulk supply point
WITNEY
Primary substation
Not stated
Connection voltage
132 kV
Technology group
Storage
Energy source 1
STORED ENERGY (ALL STORED ENERGY IRRESPECTVE OF THE ORIGINAL ENERGY SOURCE), STORAGE - ELECTROCHEMICAL (BATTERIES): 160 MW registered
Energy source 2
150 MW registered
Registered capacity
160 MW
Change to maximum export capacity
150 MW
Change to maximum import capacity
157.895 MW
Flexible connection
Not stated
In a connection queue
Not published by SSEN
Date accepted
30 Aug 2024
Date connected
Not stated
Distribution reinforcement reference
Not published by SSEN
Transmission reinforcement reference
Not published by SSEN
Export MPAN
Not stated
Import MPAN
Not stated
Last updated
10 Feb 2026
Tracked since
October 2024 edition

Change history

Tracked since the October 2024 edition, across 24 editions.

Changes to its status, capacity, technology or customer, newest first.

No change to its status, capacity, technology or customer.

Also at COWLEY GSP

GSP view

70 other sites at this grid supply point in the September 2026 edition. In all, the sites here total 2 GW: 0.4 GW connected, 1.6 GW accepted to connect.

See all 70

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