Estonia Begins Construction on 100 MW Battery Energy Storage System in Valga County
Diotech OÜ and Transcom AS will start building a 100 MW / 200 MWh battery energy storage system in Tsirguliina, Valga County, in February 2026. The Zirgu project, the largest Estonian capital-based battery park, aims to stabilize the electricity market and address price volatility in Estonia and the Baltic region. The project is expected to be completed by March 2027 and could expand to 200 MW and 800 MWh based on market demand.
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The construction of a 100 MW / 200 MWh battery energy storage system (BESS) in Tsirguliina, Valga County, will commence in February 2026, led by Diotech OÜ and Transcom AS. The Zirgu project aims to mitigate price volatility in the Estonian and Baltic electricity markets.
The initial investment of approximately 35 million euros has been secured, with potential for expansion to 200 MW and 800 MWh, making it the largest battery facility in the Baltics. Completion of the first phase is targeted for March 2027, with technology provided by LG Energy Solution. The project emphasizes local ownership and aims to retain economic value within Estonia.
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