Romania is emerging as a promising battery energy storage market, supported by new regulation, grid allocation reform, EU funding and growing market volatility. But bankability remains the key challenge.
There is a moment in every emerging energy market when a technology stops being discussed as an abstract policy objective and starts becoming a real investment category. For Romania, battery energy storage systems —.
The market has changed — but not yet enough
There is a moment in every emerging energy market when a technology stops being discussed as an abstract policy objective and starts becoming a real investment category. For Romania, battery energy storage systems — BESS — are reaching exactly that moment.
For years, storage was spoken about as something the Romanian power system would eventually need. It was the missing piece behind solar growth, grid congestion, balancing pressure, negative price intervals and the increasing difficulty of integrating intermittent renewable energy. But in practice, the legal and commercial framework lagged behind the technical need. Investors could see the opportunity, but they could not always see the route to bankability.
As of 20 May 2026, that picture is changing. Romania is no longer a market where storage exists only in policy presentations. Storage is now visible in primary legislation, in ANRE licensing rules, in the grid connection framework, in the upcoming capacity allocation mechanism and in public funding schemes. The question is no longer whether Romania recognises storage. It does. The real question is whether the framework is mature enough to support large-scale, privately financed battery deployment.
The answer is more nuanced: Romania is becoming attractive, but not yet fully de-risked.
From legal uncertainty to legal visibility
The most important legal development is that Romanian electricity legislation now recognises storage as part of the electricity market architecture. Under Law no. 123/2012, as amended, electricity activities such as production, storage, transmission, distribution, supply, trading and aggregation are carried out on the basis of licences, and ANRE may issue licences for both storage added to generation capacities and standalone commercial operation of storage installations. The law also allows ANRE to attach complementary rights to a licensed activity, which is particularly relevant for BESS because a battery rarely behaves like a single-purpose asset. It may charge, discharge, optimise, trade, support balancing, participate through aggregation or operate alongside a renewable plant.
This matters commercially. A bankable BESS project needs more than land, equipment and an EPC contract. It needs a legal identity. It needs to answer basic investor questions: what activity is being performed, what licence is required, who can trade the electricity, who bears balancing responsibility, what revenues can be contracted, and how the project interacts with the grid. Romania has now moved past the first stage of uncertainty by giving storage a clearer regulatory position.
The same evolution is visible in the grid connection rules. The Romanian connection regulation expressly covers new storage installations, production sites with storage, consumption and production sites with storage, and later modifications of existing sites by adding storage. The ATR is therefore no longer only a document for classic production or consumption sites; it can include the technical and economic conditions for connecting storage assets as well.
This is not a small change. In practice, the value of a battery is heavily dependent on its grid position. A battery located in the wrong node, with the wrong access rights or with unclear operational limitations, may look attractive in a spreadsheet and still fail in financing. In Romania, grid connection is becoming the central legal and commercial battleground for BESS.
The 2026 grid allocation reform: discipline or new friction?
The second major shift is the new capacity allocation regime. From 1 January 2026, Romania moves to an auction-based mechanism for allocating available grid capacity for production sites of at least 5 MW. Importantly, the methodology expressly captures production sites with storage, consumption and production sites with storage, and standalone storage installations.
This changes the investment conversation.
Until now, much of the Romanian renewables market was shaped by the race for ATRs. Grid capacity was often treated as an early-stage development asset. The new allocation framework tries to introduce discipline into that system by making grid capacity more transparent, competitive and economically priced. Available capacity is to be determined and published, applications are submitted by reference to network zones and commissioning years, and allocation is linked to auction mechanics.
From a policy perspective, this is understandable. Romania has suffered from speculative grid blocking, over-subscribed connection requests and an increasing mismatch between paper pipelines and real projects. From a business perspective, however, the new system creates a different type of risk. Developers will need to price grid access into the project model from the beginning. Investors will ask not only “does the project have an ATR?” but also “how was capacity obtained, what was paid for it, what is the maturity of the grid zone, and how defensible is the commissioning timeline?”
For BESS, this is especially sensitive. A battery is not simply another generator asking for capacity. It is also a flexibility resource. A well-placed battery can reduce congestion, absorb excess renewable production, support balancing and improve the use of existing infrastructure. If Romania’s grid allocation regime treats BESS only as a user of capacity, it risks missing half of the commercial and system value of storage.
The market signal: volatility has become an investment thesis
The legal framework would not matter without a revenue case. Here, Romania is becoming one of the more interesting markets in Southeast Europe.
The country has high wholesale price volatility, increasing solar penetration, grid constraints and growing balancing needs. These are exactly the conditions in which battery storage becomes commercially relevant. According to DNV’s February 2026 assessment, Romania’s day-ahead market recorded an average electricity price of around €110/MWh in 2025, while the maximum daily price spread reached around €168/MWh, creating a strong foundation for merchant arbitrage revenues. DNV also points to ancillary-service opportunities, including aFRR and FCR, although market depth and available volumes remain critical constraints.
This is where the business story becomes compelling. Romania may not yet offer the kind of long-term capacity-style revenue certainty seen in some other European markets, but it has something else: volatility. For sophisticated operators, optimisers and traders, volatility is not only risk. It is also product.
A BESS project in Romania can potentially build a revenue stack from day-ahead and intraday arbitrage, balancing services, ancillary services, co-located PV optimisation, reduced curtailment exposure and structured route-to-market contracts. But that stack is still difficult to finance on a purely project-finance basis unless revenues can be contracted, modelled and stress-tested in a way lenders understand.
This is the key difference between a profitable asset and a bankable asset.
Public support is arriving — but it is not a complete market design
A major step came on 5 March 2026, when the European Commission approved a €150 million Romanian State aid scheme to support standalone battery storage. The scheme is designed to support the installation of at least 2,174 MWh of new electricity storage capacity and is financed through the Modernisation Fund.
This is an important signal. It shows that storage is no longer only a private merchant play; it is recognised as system infrastructure. It also helps bridge the financing gap for projects that are economically justified but still difficult to underwrite because of revenue uncertainty.
However, grants do not replace market design. They can catalyse early deployment, but they do not by themselves create a mature investment framework. Romania still needs clearer rules for long-term flexibility procurement, transparent balancing-market access, predictable treatment of network tariffs, bankable curtailment provisions and more standardised route-to-market structures.
The updated Romanian NECP also gives investors a policy direction. According to a 2025 European storage-sector assessment of NECPs, Romania’s latest plan includes a target of 1.2 GW of battery storage and 800 MW of pumped hydro storage by 2030, while also referring to one-stop-shop permitting simplification. The European Commission’s Joint Research Centre similarly identifies Romania as having a BESS target of at least 1.2 GW / 2,400 MWh by 2030, increasing toward approximately 2 GW by 2035, together with an 800 MW pumped hydro target.
The direction is right. The execution is the issue.
Romania versus the region: promising, but not the most bankable yet
Romania should not be analysed in isolation. Investors looking at BESS in Southeast and Central Europe are comparing it with Greece, Bulgaria, Hungary and Poland. Each market offers a different balance between legal clarity, public support, grid availability, merchant exposure and bankability.
Greece is more advanced in dedicated storage support. Over 900 MW of standalone BESS projects were awarded availability-style contracts under a national tender supported by EU funding, with projects expected to be commissioned between 2024 and 2026. This gives Greece a stronger bankability profile because storage revenues are not left entirely to merchant volatility. For lenders, that matters.
Bulgaria has taken a different path: a very strong grant-led approach. Under the RESTORE programme, Bulgaria approved around €587 million for 82 standalone BESS projects, totalling approximately 9.71 GWh. That makes Bulgaria highly attractive on paper, but execution risk remains: project maturity, grid connection delivery, procurement timing and compliance with recovery-fund deadlines will determine whether the pipeline becomes real capacity.
Hungary has also used State aid aggressively. The European Commission approved a €1.1 billion Hungarian scheme to support electricity storage facilities, targeting at least 800 MW / 1,600 MWh of new storage. Hungary therefore offers a more policy-supported investment environment, although market liquidity, grid access and operational rules remain essential.
Poland is different again. It benefits from a capacity-market structure where storage can participate, creating a more institutional revenue layer. The European Commission’s earlier State aid approval for the Polish capacity market noted that the mechanism was open to different technologies, including demand-side response and storage. More recently, Polish utilities have announced large BESS investment pipelines, with Reuters reporting that Enea plans 866 MW of battery storage projects for commissioning in 2027 as part of a wider 1,386 MW storage pipeline.
Against that regional background, Romania’s position is clear: it is one of the most interesting upside markets, but not yet the most de-risked. Greece offers more structured support. Poland offers a stronger capacity-market angle. Bulgaria and Hungary offer large public funding schemes. Romania offers volatility, renewables growth, grid need and a developing legal framework — but investors must still work harder to build a bankable revenue case.
What Romania still needs
The next phase of Romanian BESS regulation should not be about proving that storage is useful. That debate is over. The next phase should be about converting usefulness into investability.
First, Romania needs clearer revenue visibility. Merchant arbitrage may support equity appetite, but lenders need more predictable cash-flow structures. That does not necessarily mean a full capacity market for storage, but it does mean clearer procurement of flexibility, more transparent ancillary-service volumes, standardised route-to-market contracts and better data for revenue modelling.
Second, grid access needs to become more sophisticated. Batteries should be assessed not only by the capacity they request, but also by the flexibility they provide. The system should reward storage where it reduces congestion, supports renewables integration or defers grid reinforcement. Locational signals would make the market more efficient.
Third, permitting must become more standardised. Large-scale BESS projects raise questions around fire safety, environmental screening, construction permits, land use, battery container classification and local authority practice. Investors do not need zero regulation; they need predictable regulation.
Fourth, Romania needs a more practical aggregation and VPP framework. Romanian law recognises aggregation and gives market participants involved in aggregation rights to enter electricity markets, while also making them responsible for imbalances or allowing them to delegate balancing responsibility. But practical implementation remains critical: metering, baselines, settlement, access to balancing products and the treatment of distributed batteries will decide whether aggregation becomes a real market or just a legal definition.
Finally, Romania must avoid overburdening serious projects while trying to eliminate speculation. Financial guarantees, capacity payments and strict milestone rules can clean the grid queue, but if poorly calibrated, they may also penalise serious developers facing delays outside their control, particularly in permitting, grid works or public-authority approvals.
Conclusion: Romania has entered the BESS race
Romania is no longer a passive observer in the European battery storage market. It has the legal recognition, the renewable pipeline, the system need, the volatility and now the first serious layers of public support. In many ways, the fundamentals are stronger than the regulatory comfort level.
That is exactly why the market is interesting.
For investors, Romania is not yet a “plug-and-play” BESS jurisdiction. It is a market where legal structuring, grid due diligence, revenue modelling, licensing, permitting and route-to-market strategy can materially change the value of a project. The winners will not simply be those who buy batteries. The winners will be those who understand where batteries sit in the Romanian power system — legally, technically and commercially.
The best summary is this: Romania has moved from legal uncertainty to legal visibility. The next step is bankability.
And that is where the real BESS market begins.
Related reading and services
For investors assessing Romanian BESS, the wider legal context sits in our Energy Law in Romania practice, our renewable energy legal services and the Romanian renewable projects map.
For primary legal context, see Romania's Electricity and Natural Gas Law no. 123/2012 and the European Commission approval of Romania's EUR 150 million battery storage scheme.
Related analysis: cross-border coordination and BESS growth, hybrid renewable and storage projects in Romania, standalone BESS permitting and grid issues and what an ATR means in Romanian energy projects.