Market dynamics
Article 2 of 20 · Energy markets and market dynamicsEPEX SPOT explained for businesses
Direct answer
EPEX SPOT is the European electricity exchange for short-term trading, where power for the next day and for the same day is traded, including for the Netherlands. Trading consists of a day-ahead auction and continuous intraday trading. Since October 2025 the day-ahead has priced per quarter-hour instead of per hour. This spot price forms the basis under dynamic power contracts.
- Clear definition
- Data-driven assessment
- Risks and opportunities visible
- Practical next steps
EPEX SPOT explained: scattered information versus Energy Intelligence
Businesses that deliver or consume power on the wholesale market do not trade directly with each other, but through an exchange. EPEX SPOT is that exchange for North-West Europe, the Netherlands included. It exists because electricity supply and demand must match at every moment, while output from solar and wind varies strongly. Think of a trader at an energy company buying in the afternoon for the next day. The outcome of that trading ultimately determines what you pay per hour or quarter-hour on a dynamic contract.
- The day-ahead is a daily auction where supply and demand for the next day meet; the last accepted bid sets the price for all transactions in that block.
- In intraday trading, parties buy and sell power continuously until just before delivery, to adjust their position after the day-ahead auction.
- Since October 2025 the day-ahead has 96 quarter-hour prices per day instead of 24 hourly prices; the intraday already worked with shorter blocks.
Insight
Traditional approach
Information is scattered across portals, documents, invoices or separate spreadsheets.
Modern approach
Data, context and interpretation are brought together into a clear decision picture.
Decision-making
Traditional approach
Choices are made based on averages, assumptions or occasional analyses.
Modern approach
Scenarios, KPIs and current measurement data make the trade-off more concrete and repeatable.
Follow-up
Traditional approach
Actions often stay non-committal or disappear into separate reports.
Modern approach
Follow-up actions, monitoring and reporting are linked to the same energy data.
How does the day-ahead auction work?
The day-ahead is the heart of the spot market. Once a day, buyers and sellers submit their bids for delivery on the next day. It is a blind auction: no one sees the other party's bids. Around midday the trading closes, after which all bids are combined into a supply and demand curve. Where those curves cross, the price is set. Everyone trading in that time block gets the same price, determined by the last accepted bid. Shortly afterwards the results are known. This price applies across the coupled European area, unless the cross-border connections fill up. Then prices can differ per country.
- Once a day, a blind auction for delivery the next day.
- Trading closes around midday; shortly after, the prices are known.
- All transactions in a time block receive the same price.
- The price applies Europe-wide, unless cross-border connections fill up.
Intraday trading and the shift to quarter-hours
After the day-ahead auction, reality still changes. Solar drops away, a power plant fails, consumption runs differently. On the intraday market, parties can therefore keep trading continuously, until just before the moment of delivery. This lets them adjust their position without immediately ending up in costly imbalance. The intraday had long worked with blocks shorter than an hour. Since October 2025 the day-ahead follows suit: it now prices per quarter-hour, so 96 blocks per day instead of 24. That finer division fits the fast swings of solar and wind better, and matches the quarter-hour on which the grid is settled.
- Intraday trading runs until just before delivery.
- Meant to adjust after the day-ahead, outside of imbalance.
- The day-ahead has priced per quarter-hour since October 2025.
- Quarter-hour blocks match solar, wind and the settlement of the grid.
What can you do with EPEX prices?
EPEX SPOT prices form the basis under almost every form of flexible power procurement. A dynamic contract passes the day-ahead spot price on to you per hour or quarter-hour, with surcharges and taxes added on top. If you know those prices in advance, you can shift consumption to cheap blocks: running a heat pump, charging points or a cooling installation earlier or later. Battery control also leans on these prices, by charging when power is cheap and discharging when it is expensive. Important to know: the spot price is a wholesale price. What you eventually pay is higher, because of grid charges, energy tax and VAT. And the price cannot be predicted; it moves with the weather and demand.
- A dynamic contract passes on the day-ahead spot price per hour or quarter-hour.
- Known prices make it possible to shift consumption to cheap blocks.
- Battery and appliance control use these prices as a signal.
- The spot price is wholesale; your final price is higher due to tax and grid charges.
Curious what this looks like with your own data?
In a no-obligation call, a specialist looks at your meters, sites and energy questions with you. Response within one business day.
Search the knowledge base
Find the answer to your question.
Search using your own words. Abbreviations and spelling variants are recognised, so EMS also finds the articles on energy management systems.
Topic
