Zero prices (overnight)
Fri 6 Oct · Sat 7 Oct
Research notes
Figures are for London unless they say otherwise.
What happened
- Fri 6 Oct: London reached 0p at 03:00 (1 hour at 0p in all); average 12.7p, peak 33.4p at 18:30; all 14 regions at 0p or below; lowest 0.0p in Eastern England.
- Sat 7 Oct: London reached 0p at 04:30; average 13.2p, peak 34.1p at 17:30; all 14 regions at 0p or below; lowest 0.0p in Eastern England.
Likely causes
- Fri 6 Oct, 03:00 (London's lowest half-hour): wind 15.4GW (59% of supply), solar 0GW, gas 3.6GW (14%), imports 1.3GW, total supply 26.2GW. Over the day wind averaged 15.8GW; the 2023 average was 9GW (29%). Source: NESO historic generation mix. (figures confirmed by source; link to prices is inference)
- Sat 7 Oct, 04:30 (London's lowest half-hour): wind 13.6GW (57% of supply), solar 0GW, gas 3.2GW (13%), imports 1.4GW, total supply 23.8GW. Over the day wind averaged 11.6GW; the 2023 average was 9GW (29%). Source: NESO historic generation mix. (figures confirmed by source; link to prices is inference)
- The low came overnight on Fri 6 Oct and Sat 7 Oct, when demand is at its lowest (total supply as low as 23.8GW, against a 2023 average of 31.3GW). (inference)
- Sat 7 Oct was at the weekend, when demand is lower. (inference)
- Elexon market index: Fri 6 Oct averaged £30.29/MWh with a low of −£73.24 at 04:30; Sat 7 Oct averaged £50.96/MWh with a low of −£0.66 at 12:00. Source: Elexon market index, Fri 6 Oct. (confirmed by source; a short-term index, not the day-ahead auction Agile follows)
Wider context that week
- Nothing notable found for that week.
Confidence
Low. Neither the grid figures nor any report found clearly explain this date.
Gaps
- No news report or official write-up found that ties this date to a cause; the causes above are from the data.