Slovenia launches a subsidy program for energy storage systems

Slovenian energy market operator Borzen has published detailed guidelines for a new support program offering non-repayable grants for the purchase and installation of battery energy storage systems. The budget for the call amounts to €10 million (around $11.5 million), with funds coming directly from Slovenia’s Climate Fund. Businesses, public institutions, and other legal entities will be eligible to apply.

Strict criteria and funding limits

The program is designed to co-finance not only energy storage systems themselves, but also associated hybrid inverters and necessary electrical installations and equipment. However, a key requirement is that eligible costs must be incurred within a strictly defined timeframe—between October 1, 2025, and July 31, 2026.

Additional eligibility criteria require that the storage system be physically connected to the electricity grid between January and July of the current year, i.e., before the official submission of the grant application. Furthermore, each applicant must hold a valid grid connection permit issued after January 1, 2024.

Successful applicants can receive a non-repayable subsidy covering up to 45% of eligible investment costs. However, a cap applies: maximum support cannot exceed €225 (around $259) per kWh of installed storage capacity.

Reducing dependence on fossil fuels

The official application window will open on August 4 and run until October 31, 2026, or until available funds are exhausted. Applications must be submitted electronically via Borzen’s dedicated online portal.

In its official statement, Borzen emphasized that the primary goal of the program is to help legal entities reduce their dependence on fossil fuel-based energy sources. Additionally, investments in battery storage are expected to improve energy efficiency and, in turn, enhance the market competitiveness of Slovenian businesses and institutions.