Romania’s battery energy storage sector is entering a new stage of development as investment shifts from ambitious project pipelines toward financed construction and large-scale deployment. According to the national energy regulator, 143 advanced battery storage projects with a combined capacity of 9,147 MW are currently progressing through development, while 36 projects representing approximately 2,050 MW are expected to become operational before the end of 2026. Installed battery capacity had already reached nearly 600 MW by the end of 2025, signalling the beginning of a rapid expansion that will gradually transform the country’s electricity system. As more projects move into operation, investors are increasingly focusing not only on deployment but also on how future market competition may affect long-term storage revenues.
Romania currently offers some of the strongest commercial opportunities for battery storage in Europe. According to an analysis by ENTSO-E, the country ranks as the fourth most attractive battery market on the continent, with average revenues of approximately EUR 792 per MW per day, trailing only Hungary, Bulgaria and Greece. These favourable market conditions are driven by significant intraday electricity price spreads, where abundant daytime solar generation pushes prices lower while limited storage capacity and cross-border transmission constraints create stronger prices during evening peak demand. Battery operators are therefore able to generate income through both energy arbitrage and balancing services, although increasing deployment is expected to gradually reduce these opportunities as competition intensifies.
Public funding continues to play a central role in accelerating storage deployment. Romania has committed EUR 250 million from the EU Modernisation Fund, including EUR 150 million dedicated to stand-alone battery energy storage systems and EUR 100 million for the nationwide rollout of smart electricity meters. Support for battery projects will be awarded through competitive tenders, with financial assistance capped at EUR 69,000 per MWh and a maximum of EUR 15 million per developer, targeting the installation of at least 2,174 MWh of new storage capacity. Meanwhile, the planned deployment of more than 800,000 smart meters will improve electricity settlement, network monitoring, loss management and create additional opportunities for demand-side flexibility.
Private capital and international financial institutions are also strengthening their presence in Romania’s rapidly growing storage market. The International Finance Corporation (IFC) has approved EUR 48.5 million to finance the second phase of Aukera Energy’s Gura Ialomitei project. The expansion will add 100 MW/200 MWh of battery capacity, increasing the project’s total size to 250 MW/500 MWh. At the same time, Nofar Energy has commissioned the 146 MW Ghimpati solar power plant and is integrating battery storage at the site. Across Romania, the company is developing a renewable portfolio comprising 849 MW of solar generation and 2.27 GWh of battery storage, supported by procurement contracts worth approximately EUR 80 million covering battery installations at the Ghimpati and Iepuresti projects with a combined capacity of 860 MWh.
Battery systems are also becoming an increasingly important component of integrated renewable energy developments. Tinmar Energy and EC Oltenia are planning battery storage alongside four solar power plants with a combined generation capacity of nearly 395 MW. The projects, valued at approximately EUR 243-260 million, will be financed through a combination of Modernisation Fund support, shareholder capital and commercial bank loans. Meanwhile, PPC Renewables is pursuing battery storage at its Fantanele-Vest wind farm, reflecting a broader trend among renewable developers to maximise the value of existing grid connections by combining generation assets with flexible storage capacity.
Romania’s renewable development pipeline continues to expand rapidly. The country currently has approximately 1,530 renewable energy projects, representing more than 91 GW of approved export capacity, awaiting grid connections. Transmission system operators estimate that around 30.4 GW of new renewable generation could enter commercial operation between 2026 and 2035. Under these circumstances, battery storage is no longer considered an optional technology but a critical element of future grid infrastructure, helping to manage transmission congestion, balance variable renewable generation and reduce the impact of falling electricity prices during periods of high solar production.
Despite the sector’s strong growth prospects, investors are becoming increasingly aware that today’s favourable market conditions may not persist indefinitely. Two-hour battery systems currently benefit from significant evening price spreads, but the continued expansion of storage capacity is expected to gradually reduce these price differences and compress merchant revenues. Consequently, successful long-term investment strategies will require careful consideration of declining arbitrage margins, balancing market saturation, battery degradation, augmentation costs and potential delays in obtaining grid connections. Projects that combine battery storage with renewable generation, secure advantageous grid locations, benefit from long-term capacity agreements or serve industrial electricity consumers are likely to remain more resilient than developments relying exclusively on short-term wholesale market volatility.
