As renewable energy reshapes Europe’s power system, the need for timely and reliable market data is increasing
The modernisation of the ENTSO-E Transparency Platform shows how critical digital infrastructure can be upgraded at European scale without interrupting access for users across the energy sector.
Why Transparency Matters to Europe’s Electricity Market
The European electricity market operates on a simple yet powerful principle: all market participants need equal access to the same information at the same time. This principle is embedded in European legislation. Specifically, EU Regulation No. 543/2013 mandates the publication of critical data regarding electricity generation, consumption, transmission, and market operations.
Transparency is not only a regulatory requirement. It supports fairer and more efficient market operations. Public access to essential data empowers better decision-making, helps reduce the risk of market manipulation, and enables robust regulatory oversight. Furthermore, open data fuels innovation, allowing researchers, analysts, and journalists to better understand how the European electricity system operates.
Building Europe’s Central Electricity Data Hub
To meet these rigorous legislative demands, ENTSO-E established a centralised solution: the Transparency Platform. This platform serves as a shared European data hub, collecting and publishing electricity market information in a structured format.
Today, a broad ecosystem relies on this infrastructure:
- Regulators monitor market developments and ensure policy compliance.
- Energy companies use the data to optimise operational and trading decisions.
- Analysts and journalists track market trends and system behaviour.
- The wider public gains open access, reinforcing transparency as a public value rather than a purely regulatory obligation.
Over time, the platform has moved beyond its original role as a publication tool. Today, it stands as a key reference point for information on the European electricity system.
Rebuilding Critical Infrastructure at European Scale
As Europe’s energy landscape shifts, data requirements are increasing. The volume of data has increased significantly, its structure has grown highly complex, and the market now expects near real-time availability. Static datasets have increasingly been replaced by continuous streams of operational information. Rapid digitalisation across the sector further accelerates both data generation and consumption.
After years of reliable service, the original platform reached its technical limits. Incremental upgrades were no longer enough to meet long-term requirements. ENTSO-E needed a fundamental transformation to guarantee long-term scalability, flexibility, and resilience.
Between 2023 and 2025, the platform underwent a complete technical overhaul. Rather than patching the legacy architecture, ENTSO-E worked with Unicorn Systems, its long-term technology partner, to deliver a large-scale IT transformation. The result was a new technical foundation designed to support future market developments.
The modernised infrastructure now supports substantial operational scale:
- Hundreds of thousands of incoming data messages are processed daily.
- Millions of user interactions are supported.
- The modernisation was completed with zero operational downtime.
Replacing critical market infrastructure requires a carefully controlled delivery strategy. To avoid disruptions, Unicorn Systems and ENTSO-E teams implemented a phased migration approach. The new solution was rolled out gradually alongside the legacy platform, taking over operations step by step. This controlled transition validated the new components under real operating conditions while ensuring uninterrupted data access for the entire European energy sector.
Supporting Europe’s Data-Driven Energy Transition
Today, the modernised Transparency Platform serves as a key piece of infrastructure within the European electricity ecosystem. By ensuring consistent, Europe-wide data availability, it supports the efficiency, stability and integration of Europe’s interconnected grid.
As the energy transition accelerates, the platform’s role becomes even more critical. The surge in renewable energy generation, rising system variability, and stronger cross-border interconnections demand immediate, trustworthy data. In this new reality, data transparency serves as an important enabler of grid coordination, stakeholder trust, and informed decision-making.
By delivering a unified, trusted view of the electricity system, the platform helps market participants respond to volatile conditions, supports policymakers in developing future frameworks, and gives analysts a clearer basis for understanding a more complex electricity system.
Further technical details are available in Unicorn Systems’ full case study on the ENTSO-E Transparency Platform.
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