Estonia aFRR clearing prices
Automatically-activated Frequency Restoration Reserve (aFRR) energy clearing prices for the Estonian bidding zone. One value per 15-minute Market Time Unit, per direction (up or down). Sourced from Elering, refreshed hourly.
Last refresh: 28 Apr 2026, 22:15 UTC
Source: Elering / Baltic Transparency Dashboard via Volton, CC-BY-4.0.
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Concepts
Methodology
aFRR responds automatically to system frequency deviations within ~5 minutes — the middle reserve product between fast FCR (seconds) and slow mFRR (15 min). Activations clear at the marginal aFRR bid in the merit order, per 15-minute MTU and per direction.
Estonia joined the EU PICASSO platform on 9 April 2025; aFRR capacity procurement on the BBCM started six days later. Since then, Baltic aFRR clearing prices are derived from the cross-border PICASSO auction.
Prices may be null for an MTU when no activation occurred in that direction.
FAQ
- How does aFRR differ from mFRR?
- aFRR activates automatically within minutes via a continuous control signal (PICASSO). mFRR is manually-activated and slower — used to free up aFRR after a longer system imbalance. Both clear at 15-min MTU. aFRR typically settles in narrower price ranges than mFRR because activations are more frequent and smaller.
- Why might values be missing?
- Estonia joined PICASSO in April 2025; gaps before that mean the Baltic-only legacy market was active and the cross-border data is not in the same series. Within the live PICASSO era, missing MTUs reflect periods with no activation in that direction.
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