Below zero this month
At least 27 hours
Coverage is incomplete, so the real total can only be higher.
Octopus Agile negative electricity prices
When there is more wind and sun on the grid than the country can use, Agile prices go below zero. Use power then and the unit rate is credited to you instead of charged. It is rare, it is measurable, and this is every time it has happened.
The record
-12.831p/kWh
at 12:30, in Northern Scotland
On a 7kW car charger, that half hour paid you about £0.45 to plug in.
Measured since .
How a negative half hour is counted
A half hour counts once nationally if Agile was below zero in any of the 14 regions. It is not counted again for each region that saw it. National totals are therefore neither sums nor averages of the regional ones — they are a different measurement, and comparing them directly will mislead you.
Below zero this year
At least 248.5 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
Every day, two years
One cell per London calendar day. Darker means longer below zero.
LessMoreNo data
MonTueWedThuFriSatSun
MonTueWedThuFriSatSun
MonTueWedThuFriSatSun
The biggest plunges
Open one to see the shape of the dip, half hour by half hour.
Deepest in Northern Scotland.
Deepest in East Midlands.
Deepest in Northern Scotland.
Deepest in East Midlands.
Deepest in East Midlands.
Deepest in East Midlands.
Deepest in East Midlands.
Deepest in Northern Scotland.
Deepest in Northern Scotland.
Deepest in Northern Scotland.
Deepest in East Midlands.
Deepest in East Midlands.
Which regions go negative most
Regional totals never sum to the national one — a half hour negative anywhere counts once nationally.
- East MidlandsAt least 416.5 hours (incomplete)
- LondonAt least 416.5 hours (incomplete)
- YorkshireAt least 416.5 hours (incomplete)
- Eastern EnglandAt least 413 hours (incomplete)
- West MidlandsAt least 413 hours (incomplete)
- North East EnglandAt least 413 hours (incomplete)
- North West EnglandAt least 413 hours (incomplete)
- Southern EnglandAt least 413 hours (incomplete)
- Southern ScotlandAt least 413 hours (incomplete)
- Merseyside and North WalesAt least 408 hours (incomplete)
- South East EnglandAt least 408 hours (incomplete)
- South WalesAt least 408 hours (incomplete)
- South West EnglandAt least 402.5 hours (incomplete)
- Northern ScotlandAt least 397.5 hours (incomplete)
Complete-month Agile research
The evergreen research report compares negative-price time and regional monthly averages only after two full periods pass every completeness gate. Read the Octopus Agile price report.
Know when it happens next
A double-opt-in email when published Agile rates in your region go below zero.
What these figures coverRead more
The record-low search is measured from to . Totals, trends, events and regional comparisons cover the 24 calendar months from to . Where coverage is incomplete a figure reads “at least”, because a gap can only ever make the real total higher.
Why this page can go unavailableRead more
National results use the bounded aggregate maintained alongside the tariff ingest. If that upstream aggregate is temporarily unavailable, this page fails closed rather than reconstructing national results inside the web application — a reconstructed total would be a different measurement wearing the same label.
Why Outgoing Agile has no negative pricesRead more
Every negative rate in the database belongs to Agile import. Outgoing Octopus Agile is half-hourly too and has rate history back to 2018, with no negative row at all — the export price is floored at zero. A plunge page for it would be a claim the data does not support. About Agile Octopus.