Provisional — figures revise at settlement runs
Every figure on this page is computed on initial-settlement data on basis published-2026Q2 and revises at later settlement runs; the settled quarterly report is the record.
What this is: the CE GB BESS Index between quarterly reports — trailing-30-day and calendar-month revenue per MW for the behaviour-gated GB battery fleet, per stream and per duration class, computed by the published quarterly conventions on open Elexon & NESO records. What it is not: not the settled record (the quarterly report is), not a forecast and not an appraisal — to model a site forward, open the New Site appraisal in the app. This monthly series is ex-Capacity-Market, on the floor-basis wholesale convention and carries no reserve split; the quarterly report's bridge section lists, leg by leg, what our conventions account for against the regulated benchmark's — a CE month is never to be set beside a benchmark month.
Basis published-2026Q2 — the quarterly index's published conventions with the behavioural gate computed on each point's own window; initial-settlement basis, refreshed at least monthly. Totals here are the three measured monthly streams (wholesale floor + BM + FR): the Capacity Market stream settles on an annual basis with no monthly settlement, so it is excluded from this series — the settled quarterly report's headline total includes its window-basis CM line.
Loading the provisional series…
Settled vs provisional: the settled quarterly report is the record — this series is computed on initial-settlement data and revises at later settlement runs. Provisional points are never restated silently: each refresh re-emits the full series with its computation date, and the settled quarterly report supersedes this page. Basis: the series follows the quarterly index's published basis; when the index re-bases, the outgoing basis is published beside the re-based one for at least four quarters and a basis switch appears above — every view names the basis it shows.