ProductBE
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.