Battery Index · GB
Battery revenue in Great Britain
On 25 October 2026, a 1 MW / 2 MWh battery trading the British short-term power market earned €295, deciding its schedule with the previous day's prices. Over the last 30 days it earned €4,430, and over the last 365 days €23,398 per MW.
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- Latest day
- €295
- Last 30 days
- €4,430
- Last 365 days
- €23,398
- Captured, 30 days
- 61%
Euros per MW, 1 MW / 2 MWh battery, market index prices. Prices below zero for 5 hours in the last 30 days; average daily spread between the four dearest and four cheapest hours €127/MWh.
Great Britain has no single day-ahead auction price in the public domain. The index uses Elexon's half-hourly market index price, a volume-weighted price of short-term trades, converted from pounds at the ECB reference rate of the day. The figures are therefore not directly comparable with the auction markets.
Daily revenue, Great Britain, last 90 days
Euros per day for a 1 MW / 2 MWh battery, market index prices. Red columns are days the schedule lost money.
Month by month
| October 2026 (25 days) | €3,406 |
|---|---|
| September 2026 (27 days) | €4,231 |
| August 2026 | €2,345 |
| July 2026 | €1,955 |
| June 2026 | €2,680 |
| May 2026 | €1,055 |
| April 2026 | €2,599 |
| March 2026 | €1,762 |
| February 2026 | €204 |
| January 2026 | €584 |
| December 2025 | €556 |
| November 2025 | €1,041 |
Year by year
| 2024 | €13,499 |
|---|---|
| 2025, 362 days so far | €19,241 |
| 2026, 293 days so far | €20,821 |
Questions
- How much does a battery earn in Great Britain?
- On 25 October 2026, a 1 MW / 2 MWh battery trading the British short-term power market earned €295, deciding its schedule with the previous day's prices. Over the last 30 days it earned €4,430, and over the last 365 days €23,398 per MW.
- How often were electricity prices negative in Great Britain recently?
- In the last 30 days, market index prices in Great Britain were below zero for 5 hours in total. The average gap between the four most and four least expensive hours of each day was €127 per MWh.
- How much of the possible revenue did the battery capture?
- Over the last 30 days the battery earned 61% of what a perfectly informed schedule would have made (€4,430 of €7,306).
The index counts one price series only and uses no foresight. How it is calculated.
Open data
Data for Great Britain
Daily figures since 2024. The last 90 days are free under CC BY 4.0; the full history and a daily feed are available on request.
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