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 pipeline is being assessed against grid access constraints and the potential for merchant revenues.
Within the portfolio, 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, so the market could more than triple within a single year if the announced projects reach commercial operation on schedule.
Storage revenue linked to solar-day and evening price spreads
The expansion is associated with a widening gap between solar-rich daytime prices and the evening peak. Storage operators can charge during periods when renewable output depresses the market and discharge when demand remains high after solar generation ends. Batteries can also generate revenue through frequency response, balancing and reserve products.
An ENTSO-E assessment estimates potential average daily battery revenue in Romania at approximately €792 per MW of installed capacity. On an annualised basis without adjustment, that would equal almost €289,000 per MW-year. The assessment indicates that the figure reflects current scarcity conditions rather than a stable long-term forecast.
The same assessment frames the revenue level as a market signal tied to limited interconnection, renewable volatility and insufficient flexibility. As storage deployment increases, revenue per installed megawatt is expected to decline as participants compete for balancing and arbitrage opportunities.
Pipeline statistics omit duration and affect system value
Duration is not included in headline pipeline statistics. A 9.1 GW portfolio configured as one-hour batteries would represent a different investment profile and system resource than the same power capacity configured for two or four hours. Energy capacity, cycling strategy and connection rights are described as factors determining how much of the pipeline can shift solar output into the evening.
The wider renewable queue is also cited as strengthening the case for storage. 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.
Connection limits and co-location models shape deliverability
The figures point to a credibility gap between announced projects and system absorption capacity. Romania’s electricity system cannot take in every announced renewable and storage project without major transmission reinforcement, revised connection rules and disciplined handling of speculative capacity reservations. Some projects are expected to be delayed, resized, sold or cancelled.
The role of co-located storage is highlighted relative to standalone projects that share infrastructure with solar or wind generation while using otherwise underutilised connection capacity. The commercial model is described as needing clarity on whether batteries can charge from the grid, whether charging counts against import capacity, and how priority is allocated between generation and storage.
Lenders differentiate projects by permits, grid agreements and site readiness
Financing is expected to become increasingly selective across development stages. Early projects may capture stronger balancing revenue, while later developments are described as requiring diversified income sources alongside conservative spread forecasts and robust degradation modelling. Lenders are likely to distinguish 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 is described as determining which part of the 9,147 MW pipeline represents deliverable infrastructure versus which part reflects competition for scarce grid capacity.
