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Markets

This section describes ETPA's short-term electricity markets, covering GOPACS, intraday (XBID) ex-post trading. These markets enable participants to adjust positions before, during, and after delivery, improving flexibility, liquidity, and imbalance management.

GOPACS​

GOPACS (Grid Operators Platform for Available Capacity Sharing) is a congestion management platform that enables market-based procurement of flexibility to relieve grid constraints. Through ETPA, participants can offer upward or downward flexibility that grid operators activate to resolve local congestion issues.

Key benefits:​

  • Support grid operators in resolving congestion safely and efficiently
  • Monetise flexible assets such as batteries, EV charging, and demand response
  • Contribute to a more reliable and balanced electricity system

Intraday Market​

The intraday market enables trading electricity on the same day as delivery. Participants can adjust their positions in real time through: Continuous trading: Buy or sell 15, 30 or 60-minute products up to shortly before delivery. Intraday auctions: Scheduled auctions during the day to provide additional liquidity. ETPA’s intraday trading connects to the European Cross-Border Intraday (XBID) platform, linking Dutch liquidity with other European markets.

Key benefits:​

  • Adjust to forecast errors and renewable fluctuations
  • Trade closer to delivery for greater flexibility
  • Access wider cross-border liquidity via XBID

XBID (Cross-Border Intraday)​

XBID integrates intraday electricity trading across Europe using a shared order book. Through XBID, ETPA connects Dutch participants to other EU markets like the German energy market, allowing continuous cross-border trades and price convergence.

Key benefits:​

  • Higher liquidity across borders
  • More efficient price formation
  • Seamless integration with European markets

Ex-Post Market​

The ex-post market allows trading after delivery, from the moment of physical delivery until the next trading day. Participants can correct imbalances between contracted and actual volumes, reducing imbalance settlement costs with TenneT.

Key benefits:​

  • Trade imbalances post-delivery
  • Reduce imbalance costs under dual pricing
  • Increase operational flexibility

References​

Please find more detailed information in our Knowledge Base: https://www.etpa.nl/knowledge-base/markets