Negative-price tracker · GB

Negative electricity prices in Great Britain

136.5

negative hours in 2026 (273 periods)

-99.01

all-time record GBP/MWh · Sep 6, 2025

11.0h

longest negative streak · from Jun 22, 2025

492

negative hours all-time (to 2015)

Monthly negative hours — last 21 months

2024-08: 70.5 negative hours (min -30.08 GBP/MWh) 08 2024 71 2024-09: 18 negative hours (min -25.71 GBP/MWh) 09 18 2024-10: 8.5 negative hours (min -9.74 GBP/MWh) 10 2024-11: 2.5 negative hours (min -4.11 GBP/MWh) 11 2024-12: 11.5 negative hours (min -12.27 GBP/MWh) 12 12 2025-01: 3 negative hours (min -14.33 GBP/MWh) 01 2025 2025-03: 12.5 negative hours (min -17.18 GBP/MWh) 03 13 2025-04: 24.5 negative hours (min -68.67 GBP/MWh) 04 25 2025-05: 36.5 negative hours (min -18.24 GBP/MWh) 05 37 2025-06: 57 negative hours (min -55.96 GBP/MWh) 06 57 2025-07: 12.5 negative hours (min -26.17 GBP/MWh) 07 13 2025-08: 32 negative hours (min -12.88 GBP/MWh) 08 32 2025-09: 51.5 negative hours (min -99.01 GBP/MWh) 09 52 2025-10: 14.5 negative hours (min -15.55 GBP/MWh) 10 15 2025-12: 0.5 negative hours (min -0.07 GBP/MWh) 12 2026-02: 2 negative hours (min -5.37 GBP/MWh) 02 2026-03: 19.5 negative hours (min -24.93 GBP/MWh) 03 20 2026-04: 40 negative hours (min -58.54 GBP/MWh) 04 40 2026-06: 32 negative hours (min -42.02 GBP/MWh) 06 32 2026-07: 38 negative hours (min -20.05 GBP/MWh) 07 38 2026-08: 5 negative hours (min -7.20 GBP/MWh) 08

Most negative days on record

2024-08-22

14.5 h

-19.09 GBP

2025-06-03

13.0 h

-35.62 GBP

2024-08-10

11.5 h

-30.08 GBP

2025-06-28

11.5 h

-50.65 GBP

2025-09-12

11.5 h

-12.50 GBP

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Negative prices are an opportunity — if you see them coming.

Our negative-price risk API gives P(price<0) per 15-minute period up to 14 days ahead, Brier-scored publicly. The negative_prices webhook fires seconds after the auction.

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Data: ENTSO-E Transparency Platform · SMARD.de, Bundesnetzagentur. Zone-local time (Europe/London). Updated 0 seconds ago.

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