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Electricity Network Tariff Repository
ACER's first EU-wide tool for cross-border electricity network tariff transparency, launched 20 May 2026 to support interconnector spread price discovery.
Last refreshed: 22 May 2026 · Appears in 1 active topic
Key Question
Why did ACER launch a new tariff database the week TTF broke EUR 50?
Timeline for Electricity Network Tariff Repository
#1121 May
FR-DE day-ahead spread doubles to EUR 46.58
European Energy Markets#1121 May
Launched 20 May as first EU cross-border power tariff transparency tool
European Energy Markets: ACER builds enforcement stack in 48 hoursCommon Questions
What is the Electricity Network Tariff Repository and what does it publish?
The Electricity Network Tariff Repository is an ACER tool launched 20 May 2026 that provides the first EU-wide public database of cross-border electricity transmission tariffs, standardising data previously fragmented across national regulators.Source: ACER / european-energy-markets briefing
Why do electricity network tariffs matter for cross-border power prices in Europe?
Network tariffs are a major cost of moving electricity across borders; opaque or high tariffs reduce the arbitrage that should equalise prices across interconnected markets, contributing to price spreads like the France-Germany EUR 46.58/MWh gap.Source: ACER
When did ACER launch the electricity tariff transparency database?
ACER launched the Electricity Network Tariff Repository on 20 May 2026, as part of a wider package of energy market transparency measures.Source: ACER announcement
Background
ACER launched the Electricity Network Tariff Repository on 20 May 2026 as part of a 48-hour enforcement and transparency push that also included REMIT 2.0 action. The repository creates the first EU-wide public database of cross-border transmission tariffs, underpinning the market transparency ACER cited in its REMIT surveillance report.
How the World Sees Them
ACER
The repository is a core transparency delivery under the REMIT 2.0 and Energy Union regulatory programmes, providing regulators data to detect discriminatory tariff structures.
Cross-border power traders
The repository provides the structural cost layer beneath EPEX prices; traders can now benchmark tariff-related costs per interconnector and identify where tariff wedges suppress arbitrage.
National regulators (NRAs)
NRAs submitted their tariff data for the repository; publication creates accountability and benchmarking pressure on member states with above-average cross-border transmission charges.