Great Britain · the operating fleet
Wilton BESS
One physical site, registered with the market as 3 balancing units, 150 MW in North East England. 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 16 October 2026.
The site
| Registered power, live units | 150 MW |
| Balancing units | 3 |
| Storage duration | 2 hours |
| Charging zone | North East England |
| Owned by | SEMBCORP (WILTON BESS) LIMITED |
| Traded by | Sembcorp (Wilton BESS) Ltd |
What the site earned, all units together
| Line | 364 days to 16 October 2026 |
|---|---|
| Balancing mechanism, paid to discharge | £540k |
| Balancing mechanism, paid out to charge | −£1.2m |
| Response and reserve auctions | £30k |
| Capacity market | £122k |
| Three measured lines together | not netted |
Income per kilowatt across the whole site: £4.63/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_LIONB-1 Sembcorp (Wilton BESS) Ltd | 50 | £188k | −£387k | £7k | £122k |
| T_LIONB-2 Sembcorp (Wilton BESS) Ltd | 50 | £181k | −£395k | £3k | — |
| T_LIONB-3 Sembcorp (Wilton BESS) Ltd | 50 | £171k | −£375k | £20k | — |
Grouped on evidence, not on a name: shared unit code stem LIONB, all 3 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