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.
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.
Get this data
JSON download and stable URL pattern available on the developer API page.