OctoTariffs

Negative-price history

Octopus Agile negative prices — South East England

A record of the half-hourly periods when Agile Octopus prices were below zero.

Below zero this month

At least 23.5 hours

Coverage is incomplete, so the real total can only be higher.

Below zero this year

At least 240 hours

Coverage is incomplete, so the real total can only be higher.

Below zero last year

144.5 hours

Most recent plunge

15.5 hours

25 October 2026, 00:00 to 14:30

The trend, month by month

How much time each month spent below zero.

Nov 2024Mar 2025Jul 2025Nov 2025Mar 2026Jul 2026Oct 2026
Negative-price duration by London calendar month. A month with no bar never went below zero.

Every day, two years

One cell per London calendar day. Darker means longer below zero.

LessMoreNo data
2024
MonTueWedThuFriSatSun
2025
MonTueWedThuFriSatSun
2026
MonTueWedThuFriSatSun

The biggest plunges

Open one to see the shape of the dip, half hour by half hour.

  1. Mean price: -3.517p/kWh

  2. Mean price: -0.180p/kWh

  3. Mean price: -2.445p/kWh

  4. Mean price: -0.030p/kWh

  5. Mean price: -0.270p/kWh

  6. Mean price: -1.813p/kWh

  7. Mean price: -2.935p/kWh

  8. Mean price: -2.819p/kWh

  9. Mean price: -2.862p/kWh

  10. Mean price: -0.304p/kWh

  11. Mean price: -1.406p/kWh

  12. Mean price: -0.346p/kWh