Spain is a world power in wind and solar energy: the graphics say it where it fares quite well against much larger countries and also the records he is breaking year by year. None of the world’s major economies came close to level of integration of renewables like Spain and Portugal already in 2024. In fact, there is so much that it reaches unbalance the electrical grid and what has he done to him become an export power.
And yet, the blackout of April 28, 2025 He put Spain in front of an uncomfortable truth: I didn’t have enough batteries to accompany the boom of its renewables. So Spain is doing its homework: it is the second country with the most battery storage projects in the world, only behind the United States, according to this Ernst & Young report that analyzes the evolution and perspectives of the sector.
Why is it important. Because the implementation of enough BESS would end one of the big problems with renewables: they provide energy intermittently, not on demand. If there is no storage, the excess is wasted (exporting is an option, but France is in the middle). Batteries are what is missing for the energy transition to be a reality, a reality that implies achieving energy sovereignty.
On the other hand, with a storage system sized to the capacity, the batteries would function as a blackout-proof airbag in a matter of milliseconds in the event of possible failures. Finally, the possibility of being able to store energy when it is cheap (during very sunny hours) and release it would help alleviate electricity bills.
Brief notes on the BESS. Energy storage batteries for the electrical grid or BESS (Battery Energy Storage System) They are not just huge mobile phone batteries, but rather they are storage systems the size of industrial containers (such as those on ships) packed with electrochemical cells with integrated electronics to inject or absorb energy into the grid in real time.
They work as if they were a kind of shock absorber to store excess energy that is released later, when necessary. Inside there is a kind of management brain to control its status, power inverters so that the energy is usable on a domestic and industrial scale, and control software that decides when charging or discharging occurs.
It’s time. The 2025 blackout was a friendly reminder of the situation, but it also helps that the price of lithium-ion batteries has dropped drastically: from 2014 to 2024 it fell 73% and continues to plummet: now it is at a minimum of 78 dollars per megawatt-hour. This collapse in costs is working as a catalyst for investment.
The Spain of batteries, in figures. The EY report speaks of a planned business volume of 2,000 million euros in the form of projects under development until 2030 to store 16,000 MW. By then, the National Integrated Energy and Climate Plan hope to have 22,500 MW of storage.
The Expansion medium puts This data in perspective: those 16 GW represent a 29% share of everything projected on a global scale. Only the United States exceeds that figure. To make it possible, there is already a committed public investment: 750 million euros come from the Ministry for the Ecological Transition and the Demographic Challenge, which is added to the 699 million European funds.
The ball is in the Administration’s court. Everything mentioned so far are projects and not realities, that is, having these storage systems plugged into the electrical grid. Despite the volume of business and public aid, it is the economic viability that will make these projects go from paper to materialization.
More specifically, the sector is waiting for the Spanish Government to develop a regulatory framework on how payment will be for these infrastructures and the service they provide to the network. These rewards will define their long-term profitability and therefore, whether companies decide to execute them or not.
Cover | RawPixel
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