Serbia had around 2 GW of battery energy storage system projects covered by signed grid-connection agreements in September 2026, but the agreements do not show how much capacity will reach operation. EMS, Serbia’s transmission-system operator, updated its connection-request lists on 4 November 2026, providing a picture of the development pipeline and the connection process.
About 11 GW of wind and solar projects also remained in Serbia’s transmission connection process, according to the updated lists. The battery agreements mark development progress, not a forecast of near-term operating capacity, and the projects are part of a broader queue for grid access.
EMS has set out a clearer transmission connection procedure for standalone storage, including dedicated inputs for connection studies and a separate route for storage connection approval. Before the connection-contract process can advance, sponsors must provide a bank guarantee for construction within 60 days of delivery of a connection study. This increases the cost of holding speculative queue positions and makes sponsors’ balance-sheet strength more relevant.
Revenue certainty will shape financing
SEEPEX introduced negative prices in May 2026, recording its first negative day-ahead clearing price on 10 May. The price was minus EUR 0.01/MWh for the 14:00–15:00 hour, when 673.4 MWh traded. For 30 October 2026, SEEPEX baseload reached EUR 303.29/MWh and peakload reached EUR 331.30/MWh.
The combination of hours with surplus-price conditions and hours with scarcity-price conditions creates an opportunity for storage, but also increases volatility in the assumptions lenders use. Projects able to demonstrate a full revenue stack are likely to have better financing prospects than those relying almost entirely on future merchant spreads.
Potentially stronger Serbian projects may combine batteries with renewable portfolios, industrial supply, balancing capability or optimiser contracts, rather than rely solely on arbitrage. Financial close will require sponsor equity, credible engineering, procurement and construction and warranty packages, clear market-access arrangements, realistic degradation curves and revenue stress tests. Grid access is an entry requirement; bankability will determine which projects are built.
