Great Britain · Elexon balancing mechanism
What the batteries that already exist actually earn
Every accepted bid and offer for 364 days to 2026-08-19, unit by unit. 97 of 123 registered battery units were called at all, and were paid £115.9m to discharge. Click a ring for one asset. Size is registered capacity, colour is what it earns for each kilowatt it has.
Where the money is, per kilowatt
Offer revenue only, meaning what the system paid the asset to discharge. It is not profit: a battery buys energy on balancing bids and sells it elsewhere, so the cost leg is here and the income leg is not.
The fleet, month by month
Per kilowatt per year, so a part month is not compared with a full one. Pale bars are part months.
A battery in Scotland charges eleven times as often as it discharges
Every unit, ranked
From the fleet that exists to the fleet that is drawn
Published fleet totals are larger than anything settlement data can show. Here is the whole chain, with each gap named.
Where each position came from
No warranty. Elexon settlement data is published as is. Offer revenue is one revenue line of three: ancillary services and wholesale trading are not included, and wholesale is not published for individual assets by anyone. Registered capacity is Elexon's generation capacity field, is not de-rated and says nothing about duration. Live positions are physical notifications, which are a statement of intent published ahead of time, not metered output.