Bulgaria Leads Balkans in Battery Storage Amid European Energy Strain

Bulgaria has doubled its battery storage capacity in the past year, rising from roughly 3 GW to about 6 GW. The growth was financed by €700 million in European Union grants and supported by regulatory changes that attracted private investment. According to the Association for Production, Storage and Trade of Electricity (APSTE), the country exported 3.5 terawatt-hours (TWh) of electricity in the latest reporting period—a 62 % increase over the previous year. The Electricity System Operator (ESO) reports that up to 50,000 megawatt-hours (MWh) per day leave Bulgaria, averaging around 2,000 megawatts (MW) each hour, a volume comparable to the output of the Kozloduy Nuclear Power Plant in north-western Bulgaria.

Bulgaria doubles power storage capacity as exports jump 62% Reuters

During the July-August heatwaves, the stored solar energy helped neighboring grids cope with peak demand. Exports to Romania, which shut a nuclear reactor in August because of low Danube water levels, allowed the Romanian system to reduce reliance on hydropower, preserving reservoir water. Eurostat data show that, in the first half of the year, household electricity prices were €0.1117 per kilowatt-hour in Bulgaria versus €0.1967 in Greece, underscoring the cost-saving effect of the battery-enabled exports.

Bulgaria doubles power storage capacity as exports jump 62%

Winter months will limit battery impact because shorter daylight reduces solar input, prompting reliance on conventional plants. Further expansion will require grid upgrades, and narrowing price spreads are eroding the financial incentive for investors. Government figures project an additional 5 GW of capacity by 2030, complementing the 1 GW expected by year-end.

Bulgaria doubles power storage capacity as exports jump 62%

“Battery storage is critical now. It’s not a nice to have, it’s a must have,” — Nikola Gazdov, chairman of APSTE

Bulgaria doubles power storage capacity as exports jump 62%