Combining renewable energies with battery storage systems It has ceased to be a niche experiment in Europe and has become a central component of energy planning for the next decade. Recent analyses point to a quantitative and qualitative leap in these types of projects, in a context of high price volatility and increasing grid saturation during peak green energy generation hours.
According to a report by the consulting firm Aurora Energy ResearchThe installed capacity of renewable energy projects co-located with batteries could grow by more than 450% by 2030. This represents an increase from approximately 6,3 gigawatts (GW) currently to nearly 35 GW by the end of the decade, driven primarily by the development of solar energy supported by storagewhich already represents more than 60% of these hybrid facilities on the continent.
A 450% increase to address renewable energy surpluses
Europe is heading towards a massive expansion of projects that combine renewable generation and batteriesIn an attempt to solve one of the main headaches of the energy transition: what to do with surplus electricity when production far exceeds demand. The phenomenon is especially visible on sunny and windy days, when installed solar and wind power capacity floods the wholesale markets.
According to the data analyzed, the co-located renewable capacity It would reach 6,3 GW in 2025, then accelerate to approximately 35 GW in 2030. This increase of more than four and a half times in just five years reflects both the need to better manage generation and the improved profitability offered by storing energy instead of selling it off cheaply during periods of peak demand.
The main driver of this boom is the solar energy with batterieswhich accounts for more than 60% of European hybrid installations. The drop in the cost of photovoltaic panels and batteries has led many developers to opt for integrated solutions, capable of shifting part of their production to peak pricing hours.
This co-located project model allows generators conserve energy when the market crashes and release it when the price signal becomes attractive again. Compared to the traditional approach of feeding all electricity into the grid in real time, combining it with storage provides flexibility that is better suited to an electrical system dominated by intermittent sources.
The impact of negative prices on European electricity markets
The strong focus on batteries cannot be understood without the phenomenon of negative prices in wholesale marketsDuring 2025, countries such as Spain, Germany and the Netherlands recorded more than 500 hours with prices below zero, a clear indication that renewable supply at certain times far exceeds available demand.
In those scenarios, many producers are forced to sell energy at a loss or even pay by keeping their generation connected to the grid. The problem is not only economic: it also highlights the limitations of an infrastructure that cannot always absorb all the green electricity produced, especially during off-peak consumption hours.
Batteries are presented as a key tool to take advantage of those surplusesInstead of shutting down turbines or disconnecting solar plants, storage allows us to capture energy that would otherwise be lost or sold under very unfavorable conditions, and then inject it when demand and prices rebound.
Meanwhile, concern is growing about the increase in so-called restriction or renewable dischargeThat is, the energy that must be limited to protect system stability when supply exceeds grid capacity. The Aurora report estimates that this wasted energy could increase from just over 10 terawatt-hours (TWh) in 2024 to around 33 TWh in 2030, strengthening the argument for deploying more distributed storage.
The combination of negative prices, increasing spills, and volatility in electricity markets is leading regulators and companies to rethink business models of renewable generation. For many players, integrating batteries is no longer an optional addition, but a way to protect income and extend the economic life of their assets.
Germany leads the way, with Spain and other markets gaining prominence
The analysis by Aurora Energy Research places Germany as the most attractive country Europe is leading the way in developing hybrid renewable energy projects with batteries. Several factors explain this leadership: a rapid expansion of wind and solar capacity, a highly volatile wholesale market, and return on investment expectations that are particularly attractive to developers.
Behind Germany come United Kingdom and Bulgaria as markets with significant growth opportunities. In the British case, the combination of a liberalized electricity system, high renewable energy penetration, and the need to strengthen security of supply creates a favorable environment for the deployment of energy storage. Bulgaria, for its part, benefits from expanding renewable energy potential and increasing attractiveness for foreign investment in energy infrastructure.
The report also highlights Spain, Hungary and France as countries to watch closely in the coming years. In these markets, ongoing regulatory changes and market design reforms may open the door to new revenue models for co-located projects, making it easier for batteries to participate in both energy markets and ancillary services markets, as well as other flexibility mechanisms.
In the Spanish case, the strong development of solar photovoltaics in the last decade has resulted in Frequent episodes of very low or negative prices during peak solar radiation hours. This reality, coupled with the increasing electrification of the economy, is pushing industry players to seriously consider integrating storage into new plants and existing facilities.
Aurora's study encompasses the 20 main electricity markets in EuropeThis allows us to draw a fairly complete map of where investment opportunities are likely to be concentrated and which regulatory frameworks will be most decisive in accelerating or slowing down the wave of hybrid projects.
Energy storage as a central element of the energy transition
For years, the conversation about the energy transition in Europe focused almost exclusively on increase installed wind and solar power capacityThe objective was clear: to replace fossil fuel generation with clean sources as quickly as possible. However, as the share of renewable energy grows, the challenges associated with grid balance and managing an increasingly variable supply become more pronounced.
In this new scenario, battery storage has gone from being an interesting complement to become a structural component of the electrical system. Its ability to respond in a matter of seconds, shift energy to different time slots, and provide auxiliary stability services makes it especially valuable in systems with a high penetration of intermittent technologies.
The rise of integrated projects that combine renewable generation, storage and smart demand management It is also attracting growing interest from investment funds, utilities, and new players specializing in flexibility. These projects allow for diversification of revenue streams, for example, by participating in both the day-ahead market and the capacity or balance services markets.
In addition, the continuous battery cost reductionDriven by technological improvements and global economies of scale, its adoption is becoming increasingly competitive from an economic standpoint. What was once perceived as a risky bet is now, in many cases, seen as a way to ensure the long-term viability of projects.
This change of focus is part of a broader transformation of electrical systems, where the flexibility and resilience They become as important as installed capacity. In a context of increasing electrification of sectors such as transport or certain industries, having distributed storage capacity will be key to avoiding bottlenecks and making the most of available renewable generation.
A benchmark for other markets beyond Europe
The path that Europe is following in terms of hybrid renewable energy projects with batteries It is being watched with interest from other regions of the world. Economies such as the United States and China, as well as several Latin American countries, have already begun to deploy similar schemes to improve the profitability of their renewable energy parks and alleviate pressure on their electricity grids.
In all these cases, the common denominator is the combination of falling costs of storage technologies and the need to address increasingly volatile energy markets. Batteries offer a relatively quick-to-deploy tool for managing production peaks and preventing investment in renewable generation from being underutilized.
As decarbonization and electrification progress, most countries face the same dilemma: how to integrate large volumes of clean energy without compromising the stability of electricity systems. European experience with negative prices, plant constraints, and the rapid increase in co-located projects offers insights. valuable lessons on regulatory design, price signals, and investment frameworks.
In this global context, the development of batteries associated with renewable energy installations has not only a technological or economic dimension, but also a strategic one. It allows states reduce their dependence on imported fossil fuelsto better manage international price risks and move towards more autonomous energy systems that are more resilient to external shocks.
The trajectory indicated by data from Aurora Energy Research suggests that, between now and 2030, European renewable energy projects with batteries They will move from being an emerging option to becoming a standard feature of the energy landscape, with Germany, the United Kingdom, Bulgaria, and markets like Spain gaining increasing importance. The anticipated significant increase in co-located capacity, the response to negative prices and curtailments, and the evolution of regulations are shaping a scenario in which storage will cease to be a complement and will instead take center stage in energy planning and investment in Europe.
