The next phase of SEE electricity trading will be shaped by battery dispatch. Until recently, intraday prices across the region were driven mainly by demand forecasts, hydrology, plant outages, wind and solar output, imports, and cross-border congestion. Those drivers still matter, but the arrival of utility-scale batteries in Bulgaria, Romania and Albania introduces a new variable: storage operators actively deciding when to charge, when to discharge and when to reserve capacity for balancing services.
This changes price formation. Solar growth is already creating lower-value midday periods in several European markets. As SEE solar capacity expands, the same pattern will deepen. Batteries can absorb part of that production, lifting low-price hours, but they can also compete aggressively to discharge into evening peaks, potentially reshaping scarcity pricing. The result is not necessarily lower volatility. It is more managed volatility, with stronger dependence on dispatch strategy.
Bulgaria is the leading case. Expected storage capacity of up to 3 GWh by the end of 2026 means battery behaviour will no longer be marginal. Projects by Enery, Sermatec, Sungrow, Sunotec and others can participate in energy and ancillary-service markets. That makes storage a price-setting participant rather than a passive grid-support tool.
Romania is following with solar-linked batteries, including PPC Renewables Romania’s storage retrofit at Colibași, while longer-duration projects are also being explored. Albania’s Fortis Energy project at Ersekë, combining 75 MW DC solar with 25 MWh of batteries, shows the same direction in the Western Balkans.
For traders, the practical implication is sharper forecasting requirements. It will not be enough to forecast solar production. Traders will need to forecast battery charging demand, discharge availability, balancing-market prices and state-of-charge incentives. The same megawatt-hour of solar output may have different market impact depending on whether batteries are full, empty or reserved for ancillary services.
Battery dispatch will make SEE markets more sophisticated. It will also punish traders who treat storage as a background technology rather than a front-line commercial actor.
