Great Britain has 55 GW of batteries waiting on paper for every gigawatt that runs.
NESO’s connection register holds 426 GW of storage projects. The balancing mechanism register holds 7.8 GW of batteries that trade. This year’s reform gave every permitted megawatt to projects that were already protected, so the useful question is which of the 426 GW will never be built, and at which substation the capacity comes back.
One dot is one gigawatt. A hollow dot is a request on paper. A solid dot is a battery that runs.
Every dot is a gigawatt in the connection register; the solid ones are the batteries that trade today.
NESO connection register read 29 September 2026; running fleet from Elexon’s balancing mechanism register, 29 September 2026.
Open the Development AtlasOne market today, read the same way everywhere
The same method in each country: the connection register, the operating fleet and what the fleet is paid, all from published files, rebuilt on every refresh.
Great Britain
Registers read twice a week since August 2026Italy
First read October 2026Terna publishes the requests to connect to the Italian transmission grid every month, by municipality. On 8 September 2026 Italy signed the law that hands capacity to the projects that hold a permit and orders the applicants published by name. We are reading the register now and will publish once two monthly reads agree with Terna’s own totals.
Three products
The register is free because it traces to published files. The work we add sits behind a key.
The Fleet
Every operating battery: what it earns, who owns it, who trades it, and what it is doing right now, measured from settlement rather than modelled.
The Development Atlas
The connection queue on a map: what is contracted, what is likely to fail, where capacity comes back, and what changed since the last read. Who is really behind each project is the part we resolve ourselves.
The Forecast
Tomorrow’s price, published each morning before the auction, and the long term view drawn from every public report so a page never shows nothing.
Latest findings
Short pieces written from the data, each one traceable to the files it was read from.
The company that sells a battery’s power usually does not own it
We followed the control filings behind every operating battery in Britain. On 119 of the 184 we can name, the company selling into the market is somebody else entirely. Coverage stands at 87 per cent of operating capacity.
Read it →
120 GW of the queue is contracted at connection nodes with no published location
122 strategic connection nodes created by the connections reform hold 120 GW of contracted storage between them. No published source places any of them, and they hold not one megawatt of Gate 2.
Read it →
A battery in North Scotland is turned down 39 times as often as it is turned up
A full year of Elexon settlement data across the traded fleet shows a north to south gradient: the further north an asset sits, the more the system uses it as a sink and the less it earns. Two small English zones interrupt it.
Read it →
How it is kept honest
Every number traces to a published file or is labelled as inference. The three marks below appear on every map and every page.
How every number is worked out · What you may do with each layer
The Friday ledger
Every Friday, every change in the queue since the last read: new requests, withdrawals, dates that moved, capacity that came back. One email, no commentary you did not ask for.
Confirm by email, unsubscribe from any issue. We store the address and nothing else.
The ledger covers Great Britain today.