Italy prepares for a major storage procurement round
Italy is moving toward one of its largest storage market steps yet, with energy regulator ARERA giving a favorable opinion on a proposal to target 16 GWh of storage capacity in the 2029 MACSE auction. The plan comes from the Ministry of the Environment and Energy Security and grid operator Terna, and it points to the scale of balancing capacity Italy expects it will need as the power system changes.
The endorsement is significant, but it is not a blank check. ARERA also urged caution on the final volume put to auction, arguing that procurement should account for how much storage may already be online or secured through other mechanisms by the time the auction is actually held.
The policy signal is strong even with caveats
A 16 GWh target is a large figure in practical grid terms. It indicates Italian planners see long-duration flexibility and system balancing as central infrastructure, not an edge case. Storage is becoming the connective tissue between renewable generation growth, network reliability, and market design. By attaching that view to a formal auction structure, Italy is giving developers a clearer policy signal than simple political rhetoric would provide.
At the same time, ARERA’s warning highlights a common problem in fast-moving electricity markets: planning windows are long, but capacity pipelines evolve quickly. A storage auction designed on one set of assumptions can overshoot or undershoot actual need if projects come online faster than expected, or if separate support tools procure overlapping capacity.
Why ARERA wants flexibility on auction volumes
The regulator’s reasoning is straightforward. Between publication of a projected storage need and publication of actual auction volumes, the market may change materially. Projects could already have been procured through Italy’s capacity market. Other storage assets may reach commercial operation on their own. If policymakers ignore those shifts, the auction could buy more capacity than the system needs on that timeline.
That is why ARERA endorsed the overall approach while still pressing for prudence. The message is not that storage demand is uncertain in the long term. It is that procurement should remain responsive to evidence rather than locked to an early headline number.
In other words, Italy is trying to avoid two policy failures at once: moving too slowly on storage and buying inflexibly in a market that is still taking shape.
Storage is moving to the center of energy planning
The broader implication is that storage has become a core market category in Europe’s energy transition. For years, renewable deployment debates centered on generation targets. Now the conversation is shifting toward how those electrons are moved, shifted, and stabilized over time. Auctions such as MACSE are part of that next phase.
Italy is a useful case study because it combines strong solar growth prospects, a need for grid reinforcement, and a policy system that increasingly has to coordinate among transmission planning, market incentives, and resource adequacy tools. A storage auction at this scale reflects the fact that batteries and related technologies are no longer simply pilot assets or merchant-market experiments. They are being treated as strategic national infrastructure.
What developers should watch
For developers and investors, the most important detail may be ARERA’s insistence on adjusting final volumes to reflect real pipeline conditions. That creates some uncertainty around how much capacity will ultimately be offered, but it also suggests a regulator trying to preserve market discipline and avoid distortions.
If the final auction design is well calibrated, that could be positive. Oversized procurement can depress returns, create stranded expectations, and undermine confidence in future rounds. Undersized procurement can leave reliability gaps and push balancing costs higher later. The regulator’s intervention suggests Italy is aware of both risks.
The timeline also matters. A 2029 auction target means market participants have a long runway, but it also means assumptions about costs, technology mixes, and competing revenue streams could change before procurement is finalized. That makes the policy architecture as important as the target number itself.
A cautious push, not a hesitant one
Italy’s latest move should be read as a serious commitment to storage deployment, tempered by an attempt to stay grounded in market reality. The 16 GWh target establishes ambition. ARERA’s caveat establishes discipline. Together, they show an energy system trying to scale flexibility without losing sight of timing, overlap, and evolving supply.
That balance may prove more valuable than the headline alone. Power markets increasingly need institutions that can move decisively while revising assumptions as conditions change. Italy’s storage push, at least on the basis of this proposal, looks like an effort to do exactly that.
If the eventual auction volumes reflect both the system’s need and the pipeline’s progress, the MACSE framework could become a meaningful template for how European markets procure storage at scale. The next phase will show whether that regulatory caution sharpens the market or slows it. For now, the direction is unmistakable: Italy is planning for storage as a pillar of the grid it expects to run at the end of the decade.
This article is based on reporting by PV Magazine. Read the original article.
