Brentwood
One physical site, registered with the market as 2 balancing units over time, 1 live today, 52 MW in Essex and Kent. 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 | 52 MW |
| Balancing units | 2 |
| Superseded registrations | E_BRETB-1, last seen 2025-12-08 |
| Storage duration | 1 hour |
| Charging zone | Essex and Kent |
| Owned by | CARE POWER (BRENTWOOD) LIMITED |
| Ultimately | Voltwise Power (Sandbrook Capital) confirmed |
| Traded by | EDF Energy Customers Limited |
What the site earned, all units together
| Line | 364 days to 27 September 2026 |
|---|---|
| Balancing mechanism, paid to discharge | £199k |
| Balancing mechanism, paid out to charge | −£236k |
| Response and reserve auctions | £1.5m |
| Capacity market | £134k |
| Three measured lines together | £1.6m |
The sums include what the superseded registration earned before its handover. The old and new codes were never active at the same time, so nothing above is counted twice.
Income per kilowatt across the whole site: £35.35/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| E_BRETB-1 EDF Energy Customers Limited · superseded | 49 | £0 | — | £400k | — |
| E_BRETB-2 EDF Energy Customers Limited | 52 | £199k | −£236k | £1.1m | £134k |
Grouped on evidence, not on a name: shared unit code stem BRETB, 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