Can I compare the British and Danish prices directly?

Not as like for like. Great Britain’s figure is an imbalance price, Denmark’s is a day-ahead auction price and Australia’s is a real-time dispatch price; each answers a different question.

Why do the U.S. rows show only demand?

The board publishes a price only from a source whose licence allows republication. For the U.S. grids it shows EIA-930 demand, which is public data.

What does a dash mean?

The market does not publish that figure, or not in a form we may republish. It is not a zero.

Why do the rows show different times?

Each source publishes on its own schedule: every five minutes in Australia, every half hour in Great Britain, hourly with a delay in the U.S. Every row shows its own as-of time.

Grid recap · Saturday 31 October 2026 (UTC day)

Published 00:30 UTC on 1 Nov 2026 from data as then available; later operator revisions are not applied.

Electricity used on 31 Oct, by market

TW666,573D MWh 36.7D %
GB600,193D MWh 33.1D %
NSW154,783D MWh 8.5D %
QLD140,798D MWh 7.8D %
VIC105,614D MWh 5.8D %
DK102,806D MWh 5.7D %
TAS22,507D MWh 1.2D %
SA21,301D MWh 1.2D %

Partial day, not in the totals: PJM 88D %, MISO 88D %, ERCOT 88D %, SPP 88D %, ISO-NE 88D %.

Cheapest hour SA 15:30–16:30 ACDT · −277.03D AUD/MWh

Most expensive hour GB 18:00–19:00 GMT · 257.68D GBP/MWh

Below zero VIC 7 h 50 minD · SA 7 h 45 minD · TAS 6 h 50 minD

What happened on 31 October

3 markets spent time below zero on 31 October: Victoria for 7 h 50 minD, South Australia for 7 h 45 minD and Tasmania for 6 h 50 minD. The longest unbroken run was in South Australia, 3 h 05 minD from 15:25–18:30 ACDT; the lowest price there during the day was −A$403D/MWh. The run spanned both daytime and evening hours local time. This site does not publish a generation mix for the NEM regions, so the solar and wind share in those intervals is not shown. Great Britain spiked to £258/MWhD (about 345D USD/MWh) in the hour from 18:00 GMT, above our fixed threshold of 300 USD/MWh.

Of the grids where we meter the generation mix, Denmark ran on the highest renewable share, 28.0D % over the day, with wind at 16.5D % and solar at 11.6D %. Great Britain followed at 26.8D % renewable with wind 10.8D % (transmission-metered; solar on local networks is not in this data). Taiwan followed at 14.8D % renewable with wind 4.9D % and solar 8.2D %. Across the 8D markets with a full day of metered demand, 1,814,576D MWh was used, Taiwan the largest at 36.7D % of it.

Time below zero across all markets added up to 22 h 25 minD, less than the 24 h 20 minD on 30 October. New South Wales and Queensland stayed above zero this time. Electricity used rose most in New South Wales (+4.0D %) and fell most in South Australia (−26.4D %). Denmark's renewable share fell by 10.9D points, from 38.9D %. Great Britain's renewable share fell by 6.6D points, from 33.4D %. Taiwan's renewable share fell by 2.1D points, from 16.9D %. The cheapest hour anywhere cost about −195D USD/MWh, against −47D on 30 October.

How to read this. The 31 October recap covers 15D markets (8D with a full day of demand) and was frozen at 00:30 UTC on 1 November; later operator revisions are not applied. A D badge marks a number we calculated from the operators' metered data, an M badge one published as is. Durations add up priced intervals below zero, clock times are each market's local time, and shares are energy-weighted over the day. Definitions and limits are in the methodology.

ⓘ How this recap is made

Built once after the UTC day ended, then frozen. Electricity used is the metered demand of each market added up over the day (Great Britain: transmission generation); only markets with at least 95 % metered coverage of the day are added up. Hours are UTC hours priced as the mean of the source periods. Below zero is the sum of priced intervals under zero. Nothing is estimated or filled in.

ⓘ Sources & licences

Source: Australian Energy Market Operator (AEMO), NEMWEB (licence); Source: U.S. Energy Information Administration, Hourly Electric Grid Monitor (EIA-930) (licence); Contains BMRS data © Elexon Limited copyright and database right 2026 (licence); Source: Energinet (www.energidataservice.dk); Taiwan Power Company 2026 台灣電力公司各機組發電量即時資訊(含外購電力) / 台灣電力公司今日系統供需狀況 — Open Government Data License: https://data.gov.tw/license. Derived numbers and charts: CC BY 4.0, SolarCostData Data Desk. Source data keeps its own licence.

Not for trading or operational decisions. Provisional data.