Serbia’s planned 660 MW Bistrica pumped-storage hydropower plant is progressing towards financing, with geological investigations, environmental approvals and land acquisition remaining key requirements. State utility Elektroprivreda Srbije (EPS) is advancing project preparations, while the government aims to sign a loan agreement with the Japan International Cooperation Agency (JICA) by mid-2027.
The Serbian Energy Ministry said on October 22 that discussions with JICA had resolved most outstanding technical questions. Additional laboratory results expected in the coming weeks will determine whether modifications to the dam’s engineering design are necessary.
The project’s environmental and social impact assessment is expected to be submitted to JICA in December 2026. No financing agreement has been signed, and the timetable remains conditional on technical, environmental and financial approvals.
Engineering and Environmental Requirements
Planned in western Serbia near the existing Uvac hydropower system, Bistrica is designed to store electricity by pumping water into an upper reservoir during periods of lower demand or prices, then generate electricity when demand and prices increase.
The final technical configuration remains subject to the design and financing process. Geological conditions could influence foundation design, excavation, underground structures, construction costs and project scheduling. Lenders may require further investigations and independent technical reviews before accepting the proposed budget and timetable.
Environmental requirements represent another financing milestone. The assessment must address potential effects on water systems, habitats, land use and communities, alongside applicable mitigation and monitoring measures. Submission to JICA will not itself constitute project approval. Meanwhile, EPS has started land-expropriation activities. However, the completion of land acquisition and resolution of ownership or compensation issues remain important to construction readiness and contractor access.
JICA Loan and Investment Risks
JICA’s involvement could provide long-term development financing, but loan conditions have not been finalised. The project’s overall investment requirement also depends on the final scope, including civil works, electromechanical equipment, transmission connections, land acquisition, environmental measures and contingencies.
For EPS, the central financial question is whether Bistrica’s expected economic benefits can justify its capital cost and long-term debt obligations. Any significant design changes could affect construction expenditure, procurement and the financing timetable.
Storage Economics and Renewable Integration
Bistrica could support Serbia’s expansion of wind and solar generation by absorbing electricity during periods of surplus supply and generating during higher-demand periods. Its economic value would depend on electricity-price differences, storage duration, round-trip efficiency and revenues from balancing and reserve services.
For illustration, buying electricity at €50/MWh and selling it at €150/MWh, assuming 75% round-trip efficiency, would produce an estimated gross energy-arbitrage margin of approximately €83.30/MWh generated before network charges, operating expenses and financing costs. These figures are illustrative, not forecasts for Bistrica.
Battery storage, demand response, flexible thermal generation and cross-border electricity trading are alternative sources of flexibility. Bistrica’s investment case will depend on whether its system benefits justify its cost compared with these options.
Electricity Imports and Regional Trading
Serbia’s electricity market is influenced by regional generation conditions and cross-border trading with Hungary, Romania, Bulgaria, Bosnia and Herzegovina, Montenegro and North Macedonia. Price differences could create trading opportunities, although transmission constraints and market arrangements would affect potential revenues.
Market estimates indicated that Serbia’s net electricity imports during the first 22 days of October 2026 reached approximately 515 GWh, with an estimated value of €107.6 million. These figures are market estimates rather than independently audited EPS financial results. Bistrica could help reduce electricity purchases during expensive periods, but pumped storage consumes more electricity than it generates over a complete cycle. Its value would come from shifting electricity availability rather than creating additional net supply.
Mid-2027 Financing Target
The government’s target of signing a JICA loan agreement by mid-2027 depends on the geological findings, engineering design, environmental assessment, land acquisition and agreement on financing conditions.
Independent engineering oversight would be important in assessing construction costs, procurement, technical interfaces and commissioning requirements, including equipment performance, grid-code compliance and control systems. The project remains in preparation, with financing unsigned and key technical and environmental requirements outstanding. Its investment viability will depend on a reliable engineering design, a credible construction budget and realistic projections of future electricity-market revenues.
