Romania’s battery storage sector has shifted from early-stage deployment to rapid commercial scale-up, with installed capacity tripling in the past 12 months and project structures becoming increasingly complex and finance-driven, according to James Spelling Senior Analyst at Baringa, în cadrul Energy Strategy Summit 2026, organizat de Energynomics.
“When I was here in Romania a year ago, we were looking at around 200 megawatts of batteries installed. I’ve come back 12 months later and we now have roughly triple that capacity operational in the market.”
Spelling described Romania’s energy storage market as having moved decisively into a scale-up phase, with battery capacity expanding rapidly from a small installed base to hundreds of megawatts in operation. He noted that battery projects have also evolved technically, increasing in typical duration from around two hours to four hours, which significantly broadens their ability to participate across multiple revenue streams. He attributed this acceleration to structural changes in Romania’s power system. The retirement of coal-fired capacity, the gradual decommissioning of aging gas units, and the planned addition of nuclear capacity are reshaping the generation mix. At the same time, a large pipeline of renewable energy projects is coming online, increasing volatility and strengthening the fundamental need for flexibility, which directly supports the case for storage.
He emphasized that batteries are no longer limited to energy arbitrage. They are increasingly active in ancillary services and system balancing functions, with potential future applications such as voltage control as market confidence and regulatory frameworks evolve. This expansion of use cases reinforces their economic role in the system. According to Spelling, Romania is following a similar development path to other European markets, but at a significantly faster pace. The market has progressed from an initial pilot phase, to early balance-sheet-funded projects, and is now entering a commercialization stage where larger assets require structured debt financing and higher levels of bankability.
He highlighted that this shift places new demands on project developers, including stronger business cases, more robust contractual frameworks, and greater reliance on offtake structures. Instruments such as tolling agreements, price floors, revenue sharing mechanisms, and optimization contracts are becoming central to making projects financeable, with varying degrees of risk transfer between asset owners and operators. Spelling also warned that the speed of market development introduces certain risks, particularly because financial and contractual structures are being introduced more quickly than in mature European markets, where participants had more time to test and refine them.
From a revenue perspective, he argued that arbitrage opportunities are likely to remain structurally supported over the long term due to continued renewable build-out, while ancillary service revenues may gradually face pressure as more battery capacity enters the market and competition increases. Finally, he underlined that storage economics depend heavily on system design. Short-duration batteries tend to maximize participation in ancillary services, while longer-duration assets rely more heavily on arbitrage. Mid-duration systems, around two hours, can flexibly participate across both categories. Ultimately, project viability depends not only on technology configuration but also on the quality of counterparties, optimization partners, and the financial structure used to manage risk and secure bankable cash flows.
Energy Strategy Summit 2026 was organised by Energynomics, with the support of our partners: Elektra Renewable Support, 4P Renewables, ABB, Alive Capital, Atmoce, Baringa, BCR, Big Store, Capalo AI, CBRE Romania, Distribuție Energie Electrică România, Eastship, Distributie Oltenia parte din Evryo, Eaton Electric, Electrica Furnizare, Electroalfa, Electroprecizia, EnergoBit, Enery, Enexus, Eurowind, Evryo, Exim Banca Romaneasca, Hagag Energy, KStar, LONGi, MBK Power Energy, MET Romania Energy, Monsson Trading, Nextpower, OX2, Romgaz, Schraubram, Sigenergy, Softenerg WEBUS 4 ENERGY, Solar Today, Sunotec, TBEA, Think Blu Solution, Transelectrica, Waldevar Energy, WTW Romania. Coffee Break Partner Enerta. Lanyard Partner Monsson Operation. Beverage Partners Aqua Carpatica, Alexandrion. Digital Partner Imsol. Mobility Partner BlackCab.