01
Catch
Wind farms overproduce on storm fronts. Our halls sit at the substation and absorb the surplus at the moment it is cheapest, often when the price goes negative.
4 hduration at full output
How the storm becomes supply
Three moves. Four hours. One evening peak.
02
Hold
Lithium-iron-phosphate racks in fire-sealed, nitrogen-flooded halls. No cobalt, no thermal runaway path between modules, a round trip that loses less than a tenth.
92 %round-trip efficiency
03
Spend
At the evening peak the fleet dispatches on a signal from our own desk, bid into the day-ahead and balancing markets, and covers the gap until the night wind returns.
120 msresponse to dispatch
Fleet
Four halls on the wind belt.
| Site | Capacity | Interconnection | Status |
|---|---|---|---|
| Harrow Flats | 640 MWh | 132 kV, Harrow substation | Online 2024 |
| Saltmarsh | 800 MWh | 275 kV, coastal ring | Online 2025 |
| Kestrel Ridge | 1.2 GWh | 400 kV, ridge interconnector | Commissioning 2026 |
| Anvil North | 2.0 GWh | 400 kV, new bay | Planned 2027 |
Grid operators and developers
Send the single-line diagram
Have a bay with spare capacity?
Send us the single-line diagram and the last twelve months of nodal prices. We reply within a week with a hall size, a duration and a revenue floor.