Coalburn
One physical site, registered with the market as 5 balancing units, 512 MW in Lothian and Borders. The market settles each unit on its own; this page adds them back up. Everything is read from published data for the 364 days to 27 September 2026.
The site
| Registered power, live units | 512 MW |
| Balancing units | 5 |
| Charging zone | Lothian and Borders |
| Owned by | ALCEMI STORAGE DEVELOPMENTS 4 LIMITED |
| Ultimately | Copenhagen Infrastructure Partners (Alcemi develops) confirmed |
| Traded by | Alcemi Storage Developments 4 |
What the site earned, all units together
| Line | 364 days to 27 September 2026 |
|---|---|
| Balancing mechanism, paid to discharge | £629k |
| Balancing mechanism, paid out to charge | −£2.9m |
| Response and reserve auctions | £0 |
| Capacity market | £0 |
| Three measured lines together | not netted |
Income per kilowatt across the whole site: £1.23/kW/yr on the three measured lines, before charging costs and before wholesale trading, which nobody publishes. Each unit's own page carries its estimate and its percentiles.
The units
| Unit | MW | Discharge | Charge | Standing ready | CM |
|---|---|---|---|---|---|
| T_COALB-1 Alcemi Storage Developments 4 | 103 | £148k | −£607k | — | — |
| T_COALB-2 Alcemi Storage Developments 4 | 102 | £109k | −£573k | — | — |
| T_COALB-3 Alcemi Storage Developments 4 | 102 | £114k | −£599k | — | — |
| T_COALB-4 Alcemi Storage Developments 4 | 104 | £126k | −£585k | — | — |
| T_COALB-5 Alcemi Storage Developments 4 | 101 | £131k | −£551k | — | — |
What it is built from
| Battery system | Canadian Solar e-STORAGE, SolBank |
| Entered operation | 2026-08 |
| Connection voltage | 400 kV named in the connection site |
From published documents, not from any register: supplier and contractor project pages, owner announcements and the trade press. Confidence: confirmed. Checked 2026-08-30. source 1 · source 2. Fields not shown are not published anywhere we have found, and we do not guess them.
Grouped on evidence, not on a name: shared unit code stem COALB, all 5 units within 0.1 km. Portfolio families that share a code stem across distant sites, such as an aggregator's fleet, are never grouped. Methods