Grid-scale storage
Demonstration project
Teesmouth Storage Hub
A four-hour storage hub that absorbs surplus offshore wind and returns it at the evening peak.
Teesside, United Kingdom
Commissioned
2025
200 MW / 800 MWh
Power / energy
160 × 5 MWh
Blocks
132 kV
Connection
Grid-forming
Inverters
Sector
Storage
Technology
LFP · 4-hour
Capacity
200 MW / 800 MWh
Client
Demo developer
Delivery
16 months
(01) Challenge
What stood in the way
Offshore wind was being curtailed on windy nights because the local network could not carry the power inland. The site had a 200 MW connection but very little space.
(02) Solution
What we built
A four-hour storage hub on a compact estuary site, with grid-forming inverters that also support network stability. The system charges from surplus wind and returns energy at the evening peak.
(03) Outcomes
What the system
delivers.
Illustrative demonstration figures.
≈ 290 GWh
Curtailed wind recovered per year
4 h
Evening peak covered
< 200 ms
Frequency response
(04) System details
Under
the hood.
Key specifications of the delivered system. Illustrative values.
Power / energy
200 MW / 800 MWh
Blocks
160 × 5 MWh
Connection
132 kV
Inverters
Grid-forming
