Coalburn
One physical site, registered with the market as 5 separate balancing units, 512 MW together 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 28 August 2026.
The site
| Registered power, all units | 512 MW |
| Balancing units | 5 |
| Charging zone | Lothian and Borders |
| Owned by | ALCEMI STORAGE DEVELOPMENTS 4 LIMITED |
| Traded by | Alcemi Storage Developments 4 |
What the site earned, all units together
| Line | 364 days to 28 August 2026 |
|---|---|
| Balancing mechanism, paid to discharge | £98k |
| Balancing mechanism, paid out to charge | −£177k |
| Response and reserve auctions | £0 |
| Capacity market | £0 |
| Three measured lines together | not netted |
Income per kilowatt across the whole site: £0.19/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 | £22k | −£29k | — | — |
| T_COALB-2 Alcemi Storage Developments 4 | 102 | £20k | −£35k | — | — |
| T_COALB-3 Alcemi Storage Developments 4 | 102 | £15k | −£35k | — | — |
| T_COALB-4 Alcemi Storage Developments 4 | 104 | £16k | −£39k | — | — |
| T_COALB-5 Alcemi Storage Developments 4 | 101 | £24k | −£39k | — | — |
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