European electricity bidding zones
A bidding zone is the largest area within which market participants can trade electricity without allocated cross-zonal capacity — the unit a day-ahead price is quoted for. TradingSurv covers 31 of them across 23 EU and UK countries.
Why zones, not countries
Most European countries are a single bidding zone, so the two are often used interchangeably. Several are not, and the exceptions matter more than the rule: Norway splits into five, Sweden into four, Denmark into two, and Germany and Luxembourg share one. Within a zone there is a single price; across a zone border there is a price difference whenever the interconnection between them is congested.
That difference is the object of a good deal of surveillance interest, which is why coupling and neighbour topology appear on every zone page below.
All covered zones
Central Western Europe
Nordics
Baltics
Central Eastern Europe
South Eastern Europe
Iberia
Great Britain
What each zone page carries
The ENTSO-E EIC domain code used to query the Transparency Platform for that zone, the IANA timezone its delivery day is defined in, the currency its day-ahead price clears in, its directly interconnected neighbours, and which of TradingSurv’s data streams reach it.
EIC codes are worth stating plainly because they are what an API call actually needs and they are not memorable. Verify any of them against the ENTSO-E EIC registry before relying on it in production: some countries carry several aliased domains — bidding zone, control area and market balance area — and the right one depends on the query.