Grid-scale

Bulgaria inaugurates 496 MWh battery system, announced as EU’s largest

The large-scale system was built in just six months, with support from local authorities.

By

Tristan Rayner

May 26, 2025

Bulgaria has inaugurated a 124 MW / 496.2 MWh battery energy storage system (BESS) in the town of Lovech, described by the Ministry of Energy as the largest such installation currently operating in the European Union. The system is made up of 111 battery containers and was developed by Advance Green Energy AD, a company owned by brothers Kiril and Georgi Domuschiev.

Energy Minister Zhecho Stankov said the project is “the first step” toward a national goal of reaching 10 GWh of battery storage within the next year. A recent call for capacity awarded close to 9,713 MWh in new projects.

The system was completed in six months, with Georgi Domuschiev crediting local authorities in Lovech for accelerated permitting.

Until now, one of Bulgaria only other significant BESS was a 25 MW / 55 MWh system commissioned by Renalfa IPP in 2024.

The “largest in the EU” label appears to refer specifically to total energy capacity, with the sizing metric one that can vary depending on whether comparisons are based on power rating, duration, or other factors.

Written by

Tristan Rayner

Tristan is an Electrical Engineer with experience in consulting and public sector works in plant procurement. He has previously been Managing Editor and Founding Editor of tech and other publications in Australia.

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Herby Weerakoon

May 31, 2025

Good job, can you share about your battery type and model. I’m really interested of the great job. My planing is to introduce you to our solar system development please.

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