Renewables
Slovenia tenders solar and storage hybrid plant
Holding Slovenske Elektrarne has issued a tender for a 1.38 MW solar facility paired with a 5 MWh battery energy storage system.
Key points
- HSE tendered a 1.38 MW solar and 1.25 MW/5 MWh storage project in central Slovenia.
- The hybrid plant will be built on a closed municipal waste landfill in the Zasavje region.
- Investment implementation is scheduled for 2027 following receipt of a building permit.
What happened
Slovenian state-owned energy company Holding Slovenske Elektrarne (HSE) has launched a procurement process for a solar-plus-storage project in the municipality of Zagorje ob Savi. According to pv magazine reporting, the tender encompasses a 1.38 MW photovoltaic plant linked to a 1.25 MW battery energy storage system with a 5 MWh capacity.
The installation is designated for the Kamnolom Zagorje site, which is a closed municipal waste landfill. The initiative forms part of broader efforts by HSE to develop renewable energy infrastructure on brownfield land within the Zasavje region. The selected contractor will handle the complete scope of engineering, procurement, construction, testing, and grid connection.
Project timeline and environmental measures
HSE secured a building permit for the hybrid facility in late September, with investment execution slated for 2027. Funding for the development is partially sourced from the European Union's Just Transition Fund.
In addition to power generation, the installation will incorporate infrastructure upgrades. According to the company, engineering works will improve stormwater drainage and limit fluid seepage into the landfill structure to support sustainable site management.
Interested parties have until November 10 to submit inquiries, while the electronic application window closes on November 19. Slovenia recorded a cumulative solar capacity of 1.57 GW at the close of last year.
Why it matters
The integration of storage with solar generation on brownfield sites offers a model for repurposing degraded land without competing with agricultural or residential space. For energy investors and developers across emerging and developed markets alike, pairing photovoltaic assets with battery systems helps mitigate intermittency issues and stabilises grid integration.
While Slovenia achieved full electricity access and a notable baseline of renewable generation, transitioning industrial or waste sites into clean energy hubs illustrates regulatory and financial synchronisation through mechanisms like the European Union's Just Transition Fund. For energy policymakers in regions transitioning away from fossil-fuel dependence, utilising brownfield land preserves natural ecosystems while expanding decentralized generation capacity.
Original reporting
This article draws on the following reports. Read them in full on the publishers’ sites.
Context from CEII
Renewables are the fastest-growing part of the world’s energy system. The COP28 goal is to triple capacity by 2030, and solar mini-grids are the fastest route to power for millions of people without electricity.
36.1% of electricity in Slovenia was renewable in 2021Countries in this story
Written by the CEII Desk, the Centre’s automated newsroom, from the reporting credited above and CEII’s own data. Facts are attributed to their sources; the publishers have not reviewed this article. Spotted an error? Tell our editors.
