Romania’s contract-for-difference scheme is the best thing that has happened to Romanian solar bankability. It hands developers a guaranteed price for 15 years, it cleared 2.75 GW of cheap solar and wind in a single auction round, and it is the reason international capital now treats the country as a serious market.<\/p>\n
It also, quietly, makes storing your own solar a money-losing decision.<\/p>\n
That is not a typo, and it is not a scandal. It is a design detail buried in the settlement rules, rarely spelled out in investment decks, and it is already changing how the most sophisticated developers structure their projects. If you are sizing a Romanian solar investment in 2026, this is the mechanic to understand before you draw the single-line diagram.<\/p>\n
Romania runs a two-sided, or two-way, CfD under Government Decision 318\/2024. A project bids a strike price in a competitive auction run by Transelectrica, and for 15 years the market operator OPCOM settles the difference between that strike price and a reference price.<\/p>\n
The reference price is the weighted average of Romanian day-ahead market prices for the relevant technology. The settlement runs both ways. When the reference price is below your strike price, you receive the difference. When it is above your strike price, you pay the difference back. That two-sided structure is what protects consumers and lowers the cost of capital, and it is why the scheme works.<\/p>\n
Two more rules matter here. First, for any settlement interval where the reference price is negative, the beneficiary receives no CfD payment at all. Second, beneficiaries must route all their CfD-backed output to the organised markets, except energy used for their own technological consumption. The negative-price rule is good design: it stops the state paying generators to flood a system that is already oversupplied. Keep it in mind, because it is where storage collides with the scheme.<\/p>\n
Here is the detail that reshapes the economics.<\/p>\n
According to the Energy Policy Group, electricity that is generated by a solar or wind plant, stored in a battery, discharged and then fed into the grid cannot be counted for CfD payments. The CfD settles on as-generated renewable output. The moment a megawatt-hour passes through a colocated battery, it loses its strike-price guarantee and becomes fully merchant.<\/p>\n
Now stack the rules on top of each other and follow the incentive.<\/p>\n
If you store midday solar and discharge it into the evening, you have moved that energy out of the CfD entirely. You have swapped a guaranteed 15-year price for a volatile market price, and you have paid a round-trip efficiency loss of roughly 10 to 15% for the privilege. Worse, on the two-sided settlement, discharging into higher evening prices is exactly when the reference price sits above your strike price, which is when you would be paying money back. And during the negative-price midday hours when a merchant operator would most want to store, the CfD already pays you nothing for that interval, so there is no CfD value to protect by storing.<\/p>\n
Put plainly: under the CfD, the rational move is to push every megawatt-hour onto the grid the instant the panels make it, even into a negative-priced midday, rather than store it for later. The scheme does not merely fail to reward storage. On contracted volume, it actively penalises it. Romania’s CfD pays you not to store power.<\/p>\n
This would be an academic quirk if Romanian solar rarely overwhelmed midday demand. That era is over.<\/p>\n
Romania’s installed solar passed 7 GW in 2025, with nearly 290,000 prosumers adding another 3.35 GW by late November. In early 2026, commercial solar output hit a record of around 2,048 MW, and the country recorded its first negative-price hours on the day-ahead market. Those episodes are no longer confined to sunny weekends. On one recent working day, prices were negative in five of the hours between 11:00 and 16:00, bottoming near minus 6 euros per MWh, while the evening peak with no sun spiked to about 198 euros per MWh.<\/p>\n
That intraday shape is the whole story. Across the EU, negative prices became structural in 2025, reaching around 6% of all hours in markets such as France, Germany, the Netherlands and Spain, according to the IEA. Analysis by Synertics covering eleven European markets found that while Romania’s share of negative-price hours is still lower than in Western Europe, the depth of those events is more severe, in the range of minus 7 to minus 10 euros per MWh, and that Romania tops the entire EU dataset for mean daily price spread. Its 2025 day-ahead average was about 110 euros per MWh, with a maximum daily spread near 168 euros per MWh.<\/p>\n
Read those two facts together. Every negative-price or curtailment hour is an hour when a merchant battery earns its best money and a CfD-locked solar megawatt-hour earns nothing. The gap between the two is not stable. It widens with every gigawatt of solar Romania adds.<\/p>\n
The sophisticated response is not to avoid the CfD, and not to avoid storage. It is to stop making them share a revenue line.<\/p>\n
The structure that is emerging separates the two logics cleanly. The solar, or a firm slice of it, goes under the CfD to capture a bankable 15-year floor on as-generated output. The battery sits outside the CfD perimeter as a separately metered asset, free to arbitrage the intraday spread and stack ancillary revenue without triggering clawback or losing eligibility. In practice that means not routing CfD-backed solar through the battery, letting the battery charge from the grid or from clipped and curtailed energy that would earn no CfD anyway, and discharging into the evening peak purely as a merchant asset.<\/p>\n
The reason the battery wants that freedom is in the numbers. DNV’s PLEXOS-based modelling of Romanian dispatch put total annualised battery revenue in the range of roughly 120 to 180 euros per kilowatt of installed capacity, driven heavily by the high daily spreads, with balancing markets adding materially on top. Average automatic Frequency Restoration Reserve prices sat near 9 euros per MW per hour, and Frequency Containment Reserve near 70 euros per MW per hour. None of that revenue is available to a battery whose output is swept into a two-sided CfD.<\/p>\n
The deal flow is already following this logic. Standalone batteries are advancing at scale, such as El-Mor’s BRADU project of 203 MW \/ 800 MWh in Arge\u0219 and its sister BRAZI project in Prahova. Hybrids are being built with the battery ring-fenced from the solar’s route to market, as in RGreen Invest’s 230 MW project pairing 150 MW of solar with 80 MW of storage. Renalfa acquired a 365 MW solar plant alongside a 400 MW \/ 800 MWh standalone battery with the intent of merging them into a single cluster. European Energy, builder of Romania’s largest solar plant in 2025, has said batteries will be standard on all its Romanian projects. The common thread is a battery that keeps its commercial freedom rather than surrendering it to the CfD.<\/p>\n
Romania has spent the past year removing the frictions that used to make the merchant-storage leg hard to bank, which is precisely the leg the CfD leaves out.<\/p>\n
In July 2025, ANRE eliminated the double taxation of stored electricity. Energy cycled through a battery and returned to the grid is now exempt from the transmission extraction tariff, the distribution tariff, the system services charge and the green-certificate obligation. Only the battery’s own consumption and losses remain subject to standard tariffs. ANRE’s chairman framed it bluntly, saying the country cannot build a resilient system with rules that penalise innovation. From 1 January 2026, Romania also moved grid capacity allocation for sites of at least 5 MW to an auction-based process that explicitly recognises standalone storage and storage paired with generation, which makes ring-fenced structures cleaner to permit. On top of that, a 150 million euro state aid scheme approved by the European Commission in March 2026 supports at least 2,174 MWh of new standalone battery capacity.<\/p>\n
The pattern is consistent. Romania is actively de-risking merchant and standalone storage at the same time as its CfD keeps that storage at arm’s length. For an investor, those two facts point to the same structure.<\/p>\n
A few caveats keep this honest.<\/p>\n
The CfD is not broken. It has deployed gigawatts of cheap renewable capacity, and the negative-price rule that helps create this puzzle is sound consumer protection, not an error. The flaw is narrow and specific: stored energy is excluded from CfD payments. It is also not unique to Romania. First-generation two-sided CfDs across Europe are wrestling with the same tension between rewarding as-generated output and rewarding the flexibility the grid needs, which is why the United Kingdom’s market reform and the EU’s electricity market design process are both circling the issue. Romania sits on that frontier, and it has already shown a willingness to fix adjacent barriers, as the double-taxation reform proves.<\/p>\n
There is also a real risk in the structure itself. Keeping the battery merchant means accepting merchant volatility and grid-node dependency, with no long-term contracted floor for storage, because Romania does not yet have a dedicated storage revenue mechanism. The split protects the solar’s bankability, but it leaves the battery exposed to market cycles and to the quality of its grid position. And the calculus could shift again: if Romania follows the Energy Policy Group’s suggestion and lets colocated storage opt into or retain CfD eligibility, the optimal structure would change. Investors designing projects today should keep that optionality open.<\/p>\n
We think the flaw is real, and we think it is best read as a signpost rather than a warning.<\/p>\n
The CfD is telling you, in the plainest possible terms, where each kind of value lives. Contracted, bankable revenue lives in as-generated solar. Flexibility value lives in the merchant market. The winning project structure does not fight that division. It builds along it, putting the solar under the CfD floor and letting the battery chase the spread.<\/p>\n
What makes Romania compelling is that it is arguably the best place in the EU to run exactly that split. You get a bankable CfD floor for the solar, and you get the highest intraday spreads in the EU, on Synertics’ data, for the merchant battery, plus a wave of reforms, from the removal of storage double-taxation to storage-aware grid allocation to grant support, that de-risk the merchant leg the CfD ignores. It is unusual to find a contracted floor and best-in-class merchant upside available in the same market, structured through the same project.<\/p>\n
We would pair that with realism. This is engineering, not alchemy. It takes careful metering and perimeter design, an honest view of merchant risk on the battery, and discipline on the grid node. Get the structure wrong and you either forfeit CfD value or strand the battery. Get it right, and few markets in Europe offer this combination.<\/p>\n
So do not read “Romania’s CfD pays you not to store” as a reason to stay away. Read it as the instruction manual for how to build here. The smart money already has.<\/p>\n","protected":false},"excerpt":{"rendered":"
Romania’s contract-for-difference scheme is the best thing that has happened to Romanian solar bankability. It hands developers a guaranteed price for 15 years, it cleared 2.75 GW of cheap solar and wind in a single auction round, and it is the reason international capital now treats the country as a serious market. It also, quietly,… Romania’s CfD Pays You Not to Store Power. The Single Biggest Design Flaw in the Scheme Is Reshaping How Smart Money Structures Solar<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":2652,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[43],"tags":[],"class_list":["post-2651","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/posts\/2651","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/comments?post=2651"}],"version-history":[{"count":1,"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/posts\/2651\/revisions"}],"predecessor-version":[{"id":2656,"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/posts\/2651\/revisions\/2656"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/media\/2652"}],"wp:attachment":[{"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/media?parent=2651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/categories?post=2651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/momentumgroup.ro\/en\/wp-json\/wp\/v2\/tags?post=2651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}