Serbia’s battery energy storage system (BESS) pipeline could increase competition in electricity arbitrage if a material share of projects enters operation. Reports in September 2026 pointed to around 2 GW of BESS connection agreements. The strongest projects are expected to combine market trading, balancing, renewable firming and industrial supply, rather than depend on a single merchant spread.
SEEPEX, Serbia’s electricity market exchange, recorded its first negative day-ahead price on 10 May 2026, at minus EUR 0.01/MWh. On 30 October 2026, baseload electricity reached EUR 303.29/MWh and peakload electricity reached EUR 331.30/MWh. The SEEPEX price data show the opportunity to shift electricity from lower-priced solar hours to more expensive evening hours, but do not guarantee a stable annual arbitrage margin.
Storage can serve several users and market activities. Wind and solar developers can use batteries to reduce imbalance and shape output for a bilateral buyer, while traders can manage positions across day-ahead and intraday markets. Industrial buyers can use storage to limit exposure to short scarcity periods, and batteries that qualify for balancing services can add another revenue stream. Combining these revenue sources is expected to make projects more bankable than reliance on a single merchant spread.
Serbian BESS projects should be financed as flexibility platforms, rather than as single-spread trades. A battery’s value comes from deciding when to buy or sell electricity, reserve capacity or protect another asset’s revenue. Projects financed in the current market should assume lower future spreads than those recorded during tight-market episodes in 2026.