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Latvia aFRR clearing prices

Automatically-activated Frequency Restoration Reserve (aFRR) energy clearing prices for the Latvian bidding zone. One value per 15-minute Market Time Unit, per direction (up or down). Sourced from Elering, refreshed hourly.

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Endpoints

Row schema

ColumnTypeUnitNullableDescription
mtu_start string (date-time) — no Market Time Unit start (ISO 8601 UTC). Each MTU is a 15-minute settlement interval.
direction string enum: up | down — no Activation direction: up = TSO buys energy from BSP, down = TSO sells back.
price_eur_mwh number EUR/MWh yes PICASSO marginal clearing price for activated aFRR energy in this direction. Null when no activation cleared.

Top-level response: { schema_version, generated_at, meta, rows: [...] }

Code samples

curl 
curl https://public-data.volton.energy/v1/afrr-clearing-price-lv/latest.json
DuckDB 
SELECT * FROM read_json_auto(
  'https://public-data.volton.energy/v1/afrr-clearing-price-lv/latest.json',
  records = false
);
Python (pandas) 
import pandas as pd

resp = pd.read_json('https://public-data.volton.energy/v1/afrr-clearing-price-lv/latest.json')
df = pd.DataFrame(resp['rows'])
R (jsonlite) 
library(jsonlite)
data <- fromJSON('https://public-data.volton.energy/v1/afrr-clearing-price-lv/latest.json')
df <- data$rows
JavaScript (fetch) 
const r = await fetch('https://public-data.volton.energy/v1/afrr-clearing-price-lv/latest.json');
const { rows, meta } = await r.json();
Excel Power Query (M) 
let
    Source = Json.Document(Web.Contents("https://public-data.volton.energy/v1/afrr-clearing-price-lv/latest.json")),
    Rows = Source[rows],
    AsTable = Table.FromRecords(Rows)
in
    AsTable

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.

Latvia joined the EU PICASSO platform on 10 April 2025, the last of the three Baltic states, a day after Estonia. Baltic aFRR clearing prices come from the cross-border PICASSO auction; aFRR capacity is procured jointly on the BBCM, live since 15 April 2025.

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?
Latvia 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.

License + citation

Source: Elering / Baltic Transparency Dashboard via Volton, CC-BY-4.0. CC-BY-4.0.

Volton Technology OÜ (2026). Latvia aFRR clearing prices.
CC-BY-4.0. https://public-data.volton.energy/afrr-clearing-price-lv/

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