Romania has accumulated 143 battery-storage projects with a combined power capacity of 9,147 MW in advanced stages of development, based on information submitted to the energy regulator by transmission and distribution operators. The portfolio is being assessed against grid access constraints and expected merchant revenue opportunities.
Pipeline scale and commissioning timeline
Within the pipeline, 36 projects totalling 2,050 MW are scheduled to enter operation by the end of 2026. Romania had installed nearly 600 MW by the end of 2025. If the announced projects reach commercial operation on schedule, the market could more than triple within a single year.
The expansion is linked to price patterns between solar-rich daytime periods and the evening peak. Storage can charge when renewable output depresses market prices and discharge when demand remains high after solar generation declines. Batteries can also generate revenue through frequency response, balancing and reserve products.
Estimated battery revenue and limits of comparability
An ENTSO-E assessment estimates potential average daily battery revenue in Romania at approximately €792 per MW of installed capacity. The assessment ranks Romania fourth in Europe behind Hungary, Bulgaria and Greece. Annualised without adjustment, that level would equal almost €289,000 per MW-year.
The estimate reflects current scarcity conditions and is not presented as a stable long-term revenue forecast. The assessment attributes the level to limited interconnection, renewable volatility and insufficient flexibility. As storage deployment increases and participants compete for balancing and arbitrage opportunities, revenue per installed megawatt is likely to decline.
Headline pipeline statistics also omit duration. A 9.1 GW portfolio configured as one-hour batteries would represent a different investment profile and system resource than the same power capacity set up for two or four hours. Energy capacity, cycling strategy and connection rights determine how much of the pipeline can shift solar output into evening periods.
Renewables queue and grid-connection pressure
Romania’s wider renewable pipeline is part of the context for storage development. Approximately 1,530 renewable projects representing more than 91 GW of approved export capacity are seeking network connections. Operators expect 647 projects totalling around 30.4 GW to commission between 2026 and 2035.
The figures also indicate a credibility gap between announced volumes and system absorption capability. Romania’s electricity system cannot absorb every announced renewable and storage project without major transmission reinforcement, revised connection rules and disciplined handling of speculative capacity reservations. Some projects may be delayed, resized, sold or cancelled as grid constraints are addressed.
Co-location rules and financing selectivity
Co-located storage may have an advantage over standalone projects when it shares infrastructure with solar or wind generation and uses otherwise underutilised connection capacity. However, commercial arrangements need to specify whether batteries can charge from the grid. Charging rules also need clarification on whether charging counts against import capacity and how priority is allocated between generation and storage.
Financing is expected to become more selective across development stages. Early projects may capture stronger balancing revenue, while later developments may require diversified income streams, conservative spread forecasts and robust degradation modelling. Lenders are likely to differentiate between projects with secured land, construction-ready permits and binding grid agreements versus those holding only preliminary development rights.
The next phase for Romania’s storage market will determine which portion of the 9,147 MW pipeline represents deliverable infrastructure and which portion reflects competition for scarce grid capacity.
