Balance area
A balance area is the geographic scope within which the TSO settles imbalances against each BRP's schedule. Estonia is a single balance area under Elektrituruseadus and the Konkurentsiamet-approved Bilansi tagamise eeskirjad — every metering point in the country rolls up to one Estonia-wide imbalance settlement under Elering.
A balance area (bilansipiirkond) is the geographic scope within which the TSO settles imbalances against each BRP's schedule. It is the legal frame for every balance agreement and every imbalance-energy invoice in a given country.
Estonia: a single zone
Estonia is treated as a single balance area under Elektrituruseadus and the Bilansi tagamise eeskirjad (Konkurentsiamet-approved 6 November 2025). Every metering point in the country, regardless of which DSO it is connected through, rolls up to one Estonia-wide imbalance settlement under Elering. There is no internal sub-zone splitting. This is operationally simpler than countries with multiple control areas (Germany has four, Italy six).
Why it matters for portfolios
Because Estonia is a single balance area, an aggregator running a portfolio of distributed assets (batteries, demand response, behind-the-meter solar) can net imbalances across the entire country. A solar park overproducing in the south offsets a load underconsuming in the north within the same settlement period — a netting effect that materially reduces overall imbalance cost. In a multi-zone country the same portfolio would face zone-by-zone settlement.
Cross-border
Estonia does not couple its imbalance settlement with neighbouring countries. The day-ahead and intraday markets are coupled with FI, LV and SE4 via SDAC/SIDC and physical interconnectors, but imbalance settlement happens nationally per balance area.