SUSI Partners and Eelpower joint venture
Owns 5 batteries at 5 sites, 155 MW, which is 2 per cent of everything operating in Great Britain. It sells none of that power itself. The register names 2 other companies as the sellers: Habitat Energy Limited and EDF Energy Limited.
Who sells its power
The balancing mechanism register names the company allowed to sell each unit's power. That company is usually an optimiser or a supplier working under contract, which is why the registers cannot answer the ownership question on their own. Where the seller is one of the owner's own companies, the row says so.
| Seller | Batteries | MW | Of this fleet |
|---|---|---|---|
| Habitat Energy Limited | 2 | 86 | 55% |
| EDF Energy Limited | 3 | 69 | 45% |
What it was paid
The three published lines, added up across the fleet for the 364 days to 27 September 2026. Wholesale trading income is invisible for every owner, not just this one, and nothing here nets the cost of charging. The rate is per kilowatt of current capacity.
| Balancing mechanism, paid to discharge | £0 |
| Balancing mechanism, paid out to charge | £0 |
| Response and reserve auctions | £7.1m |
| Capacity market | £1.0m |
| Income across the fleet, per kilowatt | £53.00/kW/yr fleet 42.17 |
| Median battery, all three lines | £71.94/kW/yr |
What the fleet is made of
Duration, by megawatt
Region, by megawatt
Every battery it owns
| Battery | MW | Sold by | Grade | £/kW/yr |
|---|---|---|---|---|
| Fordtown North Scotland | 46 | Habitat Energy Limited | confirmed | 71.94 |
| Dunsinane Eastern Grampian and Tayside | 44 | EDF Energy Limited | confirmed | 44.75 |
| Halesworth Mid Wales and The Midlands | 40 | Habitat Energy Limited | confirmed | 12.31 |
| Rock Farm Mid Wales and The Midlands | 16 | EDF Energy Limited | probable | 98.11 |
| Winchester (WNCRB-1) Somerset and Wessex | 9 | EDF Energy Limited | probable | 92.10 |
One battery ran under an earlier registration for part of the year, EDFE-11. The money earned under the earlier code is in the book above; the capacity is counted once.
How we know
Confirmed means a control filing at Companies House, or the owner's own published statement, names the company. Probable means the evidence is strong and indirect. Named means the register leaves the owner blank, the balancing code carries the owner's initials, and a sibling unit at the same site is already settled. Each chain below is printed once, with the batteries it settles.
Confirmed Fordtown, Dunsinane, Halesworth
The SPV name carries the joint venture; EDF and SUSI releases describe the fleet. Source
Probable Winchester (WNCRB-1), Winchester (EDFE-11) (earlier registration)
EDF's release names the JV's Winchester battery in the Rownhams constraint zone; the pair is one site re-registered. Source
Probable Rock Farm
The register names no owner. The capacity market holds a Rock Farm agreement belonging to SUSI Storage Development UK Ltd 1.3 km away, and RCKF reads as Rock Farm. Source
Attribution. A battery belongs to whoever the documents name today, so a fleet that changed hands during the year credits the whole year to the current owner. Groups are joined only where a filing joins them; a company that holds through several vehicles appears once, under the name at the top of the chain. Directors and registered offices are never used as evidence on their own. Why the registers cannot answer this question