Pillswood
One physical site, registered with the market as 2 balancing units, 100 MW in South Lancashire, Yorkshire and Humber. 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 | 100 MW |
| Balancing units | 2 |
| Storage duration | 2 hours |
| Charging zone | South Lancashire, Yorkshire and Humber |
| Ultimately | Harmony Energy Income Trust (assets under Foresight Group) probable |
| Traded by | BP Gas Marketing Limited |
What the site earned, all units together
| Line | 364 days to 27 September 2026 |
|---|---|
| Balancing mechanism, paid to discharge | £6.5m |
| Balancing mechanism, paid out to charge | −£3.6m |
| Response and reserve auctions | £2.1m |
| Capacity market | £1.1m |
| Three measured lines together | £6.2m |
Income per kilowatt across the whole site: £98.44/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 |
|---|---|---|---|---|---|
| E_PILLB-1 BP Gas Marketing Limited | 50 | £3.3m | −£1.8m | £1.1m | £555k |
| E_PILLB-2 BP Gas Marketing Limited | 50 | £3.3m | −£1.7m | £1.1m | £555k |
What it is built from
| Battery system | Tesla, Megapack |
| Entered operation | 2022-11 |
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. 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 PILLB, all 2 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