The energy transition in Serbia is evolving with the establishment of a significant solar and battery platform led by Elektroprivreda Srbije (EPS). This initiative aims to create a hybrid generation and flexibility portfolio that stabilizes the existing coal-heavy energy system while facilitating Serbia’s integration into European Union electricity and carbon frameworks.
Currently, Serbia’s energy landscape is primarily reliant on lignite-fired power plants, especially from the Kolubara and Kostolac basins, which contribute over 60-65% of the country’s electricity generation during typical hydrological years. While this framework provides a reliable baseload, it also faces challenges from rising carbon costs, operational inefficiencies, and increased maintenance capital expenditures. Additionally, fluctuations in hydropower generation complicate balancing efforts that traditional generation methods cannot adequately address.
In response to these challenges, EPS has adopted a dual-track strategy focusing on the rapid implementation of utility-scale solar projects alongside the development of battery energy storage solutions. The current solar project pipeline is estimated at 1-2 GW, with clusters in central and eastern Serbia ranging from 100 MW to 300 MW. These projects are being structured as either EPC-led developments with international contractors or through public-private partnerships involving strategic partners.
The estimated capital expenditure (CAPEX) for solar assets in Serbia ranges between €600,000 and €800,000 per megawatt, influenced by factors such as grid connection complexities and land configurations. A 1 GW solar portfolio could require approximately €700 million in investment, while a full rollout of 2 GW could approach €1.4 billion.
However, relying solely on solar energy does not fully address system constraints due to Serbia’s load profile, which features winter peaks and increasing intraday volatility. This necessitates the inclusion of battery storage systems. EPS is exploring projects that would provide between 500-1,000 MWh of storage capacity across key substations and generation sites.
The current CAPEX for battery storage is between €400 and €600 per kilowatt-hour, suggesting that investments could range from €200 million to €500 million based on final configurations. These systems are intended not only for energy arbitrage but also for multiple services such as frequency regulation and peak shaving.
Financially, incorporating storage into solar projects significantly affects their economics. Standalone solar initiatives can achieve internal rates of return (IRRs) of around 8-10%, assuming average captured prices of €60-75/MWh. With battery storage capabilities allowing for peak-price capture and ancillary services, IRRs could rise to between 11-14%, depending on market conditions.
Grid integration remains a critical factor influencing project viability. The transmission system operator EMS is currently managing an influx of connection requests in areas with limited grid capacity. This situation creates locational pricing dynamics and potential curtailment risks that must be accounted for in project planning. Expected curtailment levels could reach 5-15% in constrained nodes without necessary grid upgrades.
To mitigate these issues, investments in transmission infrastructure are essential. Planned upgrades include enhancements to substations and new 400 kV corridors, with total CAPEX potentially exceeding €500-800 million by 2030.
The strategic role of the EPS platform extends beyond domestic needs as Serbia aims to align more closely with EU electricity markets. The ability to export renewable energy during peak pricing periods—particularly to neighboring Hungary and Romania—could create additional revenue opportunities while enhancing project bankability.
Financing structures for these initiatives are adapting as well. While EPS remains the primary entity involved, there is an anticipated increase in participation from international lenders, export credit agencies, and development banks. Debt financing may reach leverage levels of 60-70%, with debt service coverage ratio (DSCR) targets in the range of 1.3-1.5 to reflect both market risks and changing regulatory environments.
Despite potential execution risks related to procurement timelines and regulatory changes that could impact project delivery, Serbia is clearly advancing towards establishing a hybrid energy system where solar power and storage play pivotal roles. This transformation signifies a fundamental shift in electricity production, trading, and valuation within the country, reducing reliance on carbon-intensive sources while aligning more closely with European market dynamics.
