Slovenia opens EUR 10 million battery storage grant scheme

Slovenia’s electricity market operator Borzen has launched a EUR 10 million ($11.6 million) non-repayable grant program funded by Slovenia’s Climate Fund for legal entities installing battery energy storage systems (BESS), with applications opening in August.

The scheme, published earlier this month, provides support covering up to 45% of eligible investment costs, capped at EUR 225/kWh, under a de minimis aid classification. Eligible costs include purchase and installation of the storage system and hybrid inverter, associated electrical installation and equipment forming part of the building, and civil works required for installation.

Eligible costs may be incurred from Oct. 1, 2025, meaning installations already completed may qualify. Systems must be connected to the grid by July 31, 2026, before the application is submitted, and must hold a valid grid connection approval issued after Jan. 1, 2024.

Applications will be accepted through Borzen’s online platform from Aug. 4 to Oct. 31, 2026, or until funds are exhausted.

The scheme is open to legal entities and other public law entities, excluding direct state budget users.

Slovenia installed 146.5 MW of solar capacity in 2025, with hybrid solar-plus-storage systems accounting for a growing share of new installations. The Borzen grant scheme is the latest in a series of Slovenian support programs targeting battery storage alongside renewable energy deployment.