Slovenian power utility HSE has secured a construction permit for a solar and battery project at the former Kamnolom Zagorje municipal landfill in Zagorje ob Savi.
The site is scheduled for redevelopment in 2027 with a 1.38-MW solar plant and a 1.25-MW/5-MWh battery system. Annual electricity production is estimated at 1,437 MWh.
The four-hour battery will store part of the solar output for later release, improving the project’s interaction with the distribution network and adding flexibility to local generation.
The development also includes drainage works intended to improve rainwater management and reduce infiltration into the former landfill body.
Part of the investment is expected to be financed through Slovenia’s Just Transition Fund.
The project is small in power-market terms but combines three policy objectives: new renewable generation, electricity storage and the rehabilitation of degraded land. For HSE, former industrial and municipal sites offer a route to expand renewables without competing for undeveloped land—a constraint likely to become more important as Slovenia’s solar pipeline grows.
