OctoTariffs

Negative-price history

Agile negative prices — Yorkshire

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

Below zero this month

23.5 hours

Below zero this year

179.5 hours

Below zero last year

144.5 hours

Most recent plunge

30 minutes

12 September 2026, 15:00 to 15:30

The trend, month by month

How much time each month spent below zero.

Oct 2024Feb 2025Jun 2025Oct 2025Feb 2026Jun 2026Sept 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: -0.630p/kWh

  2. Mean price: -2.134p/kWh

  3. Mean price: -3.268p/kWh

  4. Mean price: -1.407p/kWh

  5. Mean price: -2.174p/kWh

  6. Mean price: -2.137p/kWh

  7. Mean price: -0.929p/kWh

  8. Mean price: -2.702p/kWh

  9. Mean price: -3.552p/kWh

  10. Mean price: -4.421p/kWh

  11. Mean price: -4.220p/kWh

  12. Mean price: -1.681p/kWh