panels

The rain in Seville is wonderful and now it is also converted into energy with the new CSIC solar panels

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If there is a renewable energy that has emerged in recent years, it is solar, as can be seen in this graph of the International Energy Agency. However, solar energy still has its limitations: it requires space (hence there are projects in lakes and in the open sea) and of course, it depends on whether there is sun. Yes, putting batteries can cushion that irregular supply (here Spain is a powerhouse), but a research team from the University of Seville with the CSIC has given a twist to classic photovoltaic panels and now can generate electricity with rain. Context. Solar panels lose effectiveness when full sun does not fall on them, either because there are clouds or it rains. Therefore, the ideal scenario is midday on a sunny day, but spoiler: this happens less times than you need to plug something in. Not to mention devices that need continuous and autonomous energy supply, no matter what happens in the electrical grid. The battery option allows us to satisfy the supply on demand and although now They are at their minimum pricestill involves purchasing another component, considering its useful life and its management as waste. The invention. As explains the CSIChave developed a hybrid device that allows capturing energy from both the sun and rain, and also doing so at the same time. As? With a sheet thinner than a human hair (100 nanometers) superimposed on the solar cells. It works on two fronts at the same time: on the one hand as a protective encapsulant for perovskite solar cells, improving their durability in adverse conditions. On the other hand, as a triboelectric nanogenerator: it converts the impact of raindrops into electricity due to friction. Thus, it is capable of producing up to 110 volts, enough to light LEDs or power sensors. Why is it important. Because if this technology is commercialized, it will open the doors for completely autonomous electronic devices to function without batteries or plugs. This is the case of the implementation of IoT outdoors or in remote areas without access to the electrical grid. It serves as an example of use in applications in rural infrastructure or agriculture, such as environmental sensors, weather stations, urban signage or auxiliary lighting. The innovation is not only generating energy from rain, but integrating it all into a single thin layer that solves the main Achilles heel of perovskite: its environmental degradation. In fact, science had already proven with taurine from octopuses. How have they done it. To carry out this device, they used plasma technology to deposit plasma technology in a similar way to that implemented in mobile screens. For the base, perovskite cells, a material with better efficiency and lower cost than traditional silicon, but fragile under conditions such as humidity. The use of triboelectric materials is not new: a research team from the University of Hong Kong a few years ago something similar occurred to him: the generation of electricity by the simple friction of droplets upon impact, such as static electricity generated by rubbing a balloon. Yes, but. Although technically speaking they have generated electricity, the reality is that it is high voltage but low intensity, which in practice is not even useful for charging a mobile phone. And although the perovskite is reinforced with this sheet, in the long term it is still less durable than silicon, so it still has pending issues. Likewise, there remains the great challenge of leaving the laboratory and validating these experiments in real environments. If production can be scaled to an industrial level, another challenge would arise: keeping costs low. In Xataka | Europe produces more clean electricity than fossil electricity for the first time. The hard part starts now In Xataka | Solar panels have an invisible and very brief moment in which they do not work. And solving it is key to your future Cover | Lara John

We just discovered that silicon has an invisible bottleneck, and that has a direct impact on our solar panels

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You turn on a solar cell and wait for the electrons to flow. But there is a moment, invisible and very brief, in which a part of them simply stops. A new study published in Physical Review B just explained why. The discovery. Researchers from the Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanoscience) and the Max Planck Institute for Polymer Research in Germany (MPIP) have discovered that, in silicon, photoexcited electrons do not activate immediately when they receive light. For a few picoseconds (millionths of a millionth of a second) they become stuck in small traps of the material before they can circulate and generate current. The person responsible has a name: a phonon bottleneck. What are phonons and why do they matter? Silicon has a peculiarity compared to other materials: for an electron to be released when receiving light, photons are not enough. According to account IMDEA Nanoscience in its note also needs the collaboration of phonons, which are the vibrations of the crystalline lattice of the material itself. As has been discovered, when such timing vibrations are scarce, electrons become temporarily trapped in surface defects near the edge of the energy band. What no one expected to find. Enrique Cánovas himself, one of the authors of the study, recognize that the discovery was accidental. “What we observed was an accident. We expected an instantaneous response, but instead we saw the electrons take a breather,” he says. Until now, the phonon bottleneck was known in high-energy situations, when silicon was excited with very energetic electrons. This is the first experimental record of the phenomenon with low-energy excitations, which occur with near-infrared light, or even below, the absorption threshold of the material. Until now unexplored territory. Why it has practical relevance. Silicon is the heart of the vast majority of solar panels of the world. Any inefficiency in how your electrons respond to light has direct consequences on the performance of those photovoltaic cells. Understanding that this transient delay exists, and that it has an identifiable cause, opens the door to two possible paths: designing materials or structures that minimize this jam, or even taking advantage of it in a controlled way to improve the behavior of the device. It remains to be seen if the impact of this phenomenon is significant enough to justify redesigns in the manufacturing of solar cells and photovoltaic systems. Cover image | yue chan In Xataka | Imitating photosynthesis to transform CO2 into fuel was always a dream. One that has already come true

There was a reason for airports to avoid solar panels, and Malaga has just dismantled it

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In our daily lives we are increasingly accustomed to seeing solar panels. on balconies either roofs. Even when we travel by car it is common to find plate-covered land either large wind turbines. However, there is one place where until now solar energy seemed out of place: airports. For years, sun reflection was an unsolved problem in the airport environment. The fear that a flash could affect a pilot on approach stopped any attempt to install solar panels. In Malaga, that fear is no longer an obstacle. In short. Malaga-Costa del Sol Airport sum for the first time self-consumption photovoltaic installations promoted by private companies. Europcar and Goldcar They were the first to take the stepwith a project developed by the Malaga engineering company Ubora Solar. As La Opinión de Málaga highlightsit is not a project promoted by Aena, but rather a direct commitment by private companies to generate their own clean energy in one of the most regulated and monitored spaces in the country. The big obstacle: glare. The main challenge of the project was not technical or economic, but rather air safety. The possibility that the solar panels generated annoying reflections or glare on pilots and controllers was a critical concern, also regulated by Aena regulations. The answer involved an exhaustive analysis of visual risk. Ubora Solar developed aeronautical glare studies following the standards of the Federal Aviation Administration (FAA) and the European Aviation Safety Agency (EASA), taking into account everything from the actual flight trajectories to the visibility from the control tower. All of this served to precisely define the orientation and inclination of the panels within the airport complex. The results were conclusive. Luminance values ​​were well below the European threshold of 20,000 cd/m², and any possible reflection coincided with the position of the sun, being “masked by its own brightness”, a phenomenon known as sun masking. In other words: the reflection exists, but it is imperceptible and does not pose an operational risk. In other countries it was already a reality. Although solar installations already exist in airports in other countries, the case of Malaga is especially relevant due to its private nature. In the United States and in different parts of Europeairport photovoltaics has been a reality for years, always subject to strict glare and air safety studies. The difference, as various media emphasizeis that in Spain this step had not yet been taken without a direct impulse from the airport manager. Málaga thus acts as a laboratory and precedent for a model that could be replicated in other airports in the country. A success that does not blind. For years, the sun was seen as a risk at airports. In Malaga, he has become an ally. The project shows that the greatest fear —the glare— it is not fought with prohibitions, but with rigorous studies, planning and technology. Málaga-Costa del Sol Airport not only manages takeoffs and landings. It has also opened a new path for the energy transition in one of the most complex environments that exists. And it has done so without losing sight of the most important thing: safety. Image | solar ubora and Unsplash Xataka | When the December sun surpasses that of April: the luminous paradox of a vertical panel on the balcony

The big problem with putting solar panels on crops is shade. The University of Jaén has found a solution

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In search of fulfilling the decarbonization goalswe are filling the field with solar panels. Giants like China can do it combining other activities well, but in the case of smaller countries, things change. Spain is an examplewith a field irrigated by crops that is also being plagued by panels. Now, a research team from the University of Jaén has found the key to continue deploying solar panels without interfering with crops. A panel with minimal shading that does not compromise its energy generation. The agrovoltaics. Different reports have pointed out how the temperature will increase by 1.5 to 3.2 degrees If we continue the same as until now. For this reason, the European Union marked the milestone of 30% of its energy comes from renewables by 2030 to, in 2050, achieve climate neutrality. Wind is important, but what almost all countries are embracing is photovoltaics. The price of the plates has fallen to the ground thanks to the China overproduction and it has begun to be deployed massively. The problem is what we mentioned: it takes up a lot of space, which opens a direct conflict with the farmland. There, agrovoltaics is becoming established as a solution to place panels that do not interfere with the cycle of some crops, and mixes with beekeeping and the livestock. But if we want to continue expanding photovoltaics, panels that provide less shade are needed. Panels and photosynthesis. That is where the solution devised by the University of Jaén comes into play. In a study Published in Science Direct, researchers detail a technology that allows a panel to efficiently generate electricity, while allowing crops to receive enough light to perform their optimal photosynthesis cycle. To do this, the team has taken into account two technical parameters: the average visible transmittance and the average photosynthetic transmittance. In practice, they indicate the amount of light useful to the plants that reaches them after passing through the panel, and they point out that different studies estimate that, for most crops, the minimum value should be around 60%. In that spectrum, plants produce normally. Status of the “transparent” panels“The photovoltaic industry has been working on this for some time. There are two approaches: Non-wavelength selective panels: They are those that absorb a large part of the solar spectrum and achieve transparency by reducing the color of the material or leaving gaps between the cells. With them, transparency is not adequate. Wavelength Selective Panels: They are those that absorb, above all, ultraviolet and near-infrared radiation, but allow a large part of the visible light to pass through. It is what the plants need and, in this case, the transparency of the panels is greater and more suitable for crops. RearCPVbif. In the two groups the industry is testing very different technologies, from polycrystalline silicon to organic cells and color-sensitized panels, but the Spanish team’s approach is somewhat different. The semi-transparent photovoltaic modules They are the STPVs, but what is proposed by the University of Jaén is a system called RearCPVbif, or “Bifacial Rear Concentrator Photovoltaic.” Unlike conventional semi-transparent designs, this technology concentrates and redirects reflected light towards the back of the bifacial cells, generating an increase in electrical production without reducing optical transparency, which is what allows light to reach the plants. It is an STPV, but with rear optical concentrators. In statements to PV-MagazineÁlvaro Varela-Albacete, co-author of the research, points out that STPV technology is being underused and that, with these rear concentrators, there is “a substantial increase” in energy generation without compromising optical transparency. “And how much is the transparency factor? 60%, according to the study, so it would be suitable for most horticultural crops. Next steps. In the study they also mention that they have taken into account that a crucial aspect for agricultural viability is thermal behavior, indicating that, in their tests, the cell temperature was below 70 degrees. This is important so that the panels do not create a “greenhouse” that affects crop patterns. And most importantly: this technology has already attracted attention. Numerous promising studies are published throughout the year, but their application is not always clear. In the case of this ReadCPVbif technology, the co-author of the study, Eduardo Fernández, points out that they are already engaging in conversations with different organizations to accelerate the development of the technology. Now, the route hour includes an evaluation of the benefits for crop growth, with different test campaigns on real crops. In any case, it aims to be a particularly relevant technology in the intensive horticulture that occurs in regions of Spain such as Almería, where apart from the sea of ​​plastic, also the photovoltaic sea is rising. If the two things can be combined, it would be a great step for both sectors. Images | University of Jaen, Σ64 In Xataka | Almería has been Europe’s great “sea of ​​plastic” for years. Now it wants to be another sea: that of solar panels

When the cold arrives and we turn on the Christmas lights, something worries those who have solar panels

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When Christmas approaches and the first waves of cold begin to seep through the buildings, Spain turns on its lights again. Streets, balconies and living rooms light up as temperatures drop in winter particularly unstable. But, along with this luminous ritual, a new question has arisen in many homes: can Christmas lights, climbing reindeer or LED garlands interfere with the solar panels that already occupy thousands of balconies and rooftops? The doubt is understandable. For years it has been repeated that shadows are the number one enemy of solar energy, leading to the belief that any object—no matter how small—could ruin production. But the reality is much less dramatic. The coexistence between self-consumption and Christmas decoration is today simple, safe and with practically no impact on the generation. “Lights bordering a solar panel are usually not a problem,” Alejandro Diego Rosell explains to Xatakaenergy consultant and professor specialized in photovoltaics. “The panel isn’t that picky… as long as you don’t cover their face.” A thin LED garland, a light cable passing over it or a spot light “generate minimal or directly negligible loss.” The only scenario to avoid is opaque, large or rigid objects that cast harsh shadows for many hours, or those that physically rest on the glass of the panel. Not due to electrical risk, but for safety and durability: wind, weight and scratches can damage the surface. Not even a slight shadow. To understand why these minor shadows are no longer a relevant problem, it is worth looking at how the panels have evolved. Héctor de Lama, technical director of the Spanish Photovoltaic Union (UNEF), He sums it up to Xataka like this: “A large part of the current panels are monocrystalline split-cell panels. This innovation allows that, if a part of the panel is covered, the performance of the entire module is not lost. In previous panels, if an area was covered, you lost almost all production.” In other words, modern modules work in independent halves and support partial shading much better, especially if they are narrow, discontinuous or moving shadows, such as those generated by LED strips or light decorations. Even so, de Lama clarifies that completely covering a panel can significantly affect “depending on how the circuits are connected and whether they contain optimizers.” In fact, Diego agrees with the idea, but takes it to everyday ground with humor: “Santa Claus hanging from the balcony, acrobatic reindeer, Three Wise Men rappelling… All of this falls into the category of emotionally necessary but technically harmless decoration.” And the invoice? A lot of noise, very little expense. Although many households associate Christmas lights with an increase in electricity consumption, the real impact is minimal. According to energy expert Iván Terrón, interviewed by El Españolthe cost is surprisingly low: “Even if they are on 24 hours a day, LED Christmas lights cost very little. All together they cost about the same as running a washing machine.” Starting from an average price of €0.14/kWh, Terrón estimates that keeping them on for a whole month is around 5 euros. The data from Selectra, a media specialized in energy consumption, offer an even more precise breakdown: 100 LED lights consume 5 W. In 33 days, at 6 hours a day, that is equivalent to 0.99 kWh, that is, about 0.10 euros. An equivalent incandescent garland – already rare – can reach 1.23 euros in the same period. Even in indexed or PVPC rates, where it is advisable to avoid the most expensive hours (between 6:00 p.m. and 10:00 p.m.), the impact remains symbolic. For those who want to optimize thoroughly, early morning usually offers the lowest prices; But in practical terms, the cost of Christmas lights is practically irrelevant. Christmas and self-consumption: coexistence without surprises. In a meteorologically hectic winter and with millions of households more attentive than ever to the price of electricity, any doubt about self-consumption generates concern. But in this case, the technical evidence is clear: the usual Christmas lights and decorations do not damage the solar panels, do not compromise the installation and have almost no economic impact. The final recommendation is as simple as it is poetic: let the lights illuminate your home and let the panels continue to see the sky. With common sense and modern technology, the magic of Christmas and the sun can coexist without a shadow of conflict. Image | Unsplash and FreePik Xataka | Vigo represents its consecration, but the journey of Christmas lights begins in another Spanish town: Puente Genil

A family wanted to live with only solar panels, well water and a garden. Until Italy took away her children

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High in a forest in Abruzzo, Italy, a stone house now stands silent. Until just a few weeks ago, that place was the self-sufficient refuge of Nathan Trevallion, Catherine Birmingham and their three children. But a few days ago, a judge decided to remove them of family custody for living disconnected from the grid, without schooling and in an environment that he considered unhealthy. The resolution started a fire political and social in Italy. What for the family was a self-sufficient life project—solar panels, well water, compostable toilet, garden—has become a court case with enormous international repercussions. The story, however, goes beyond an Italian court order. It is the symptom of something bigger: a growing movement in Europe—and also in Spain—of families and communities seeking to get out of the urban grind, disconnect from the electrical grid and live self-sufficiently. How far does the freedom to choose that lifestyle go? And where does the State’s intervention begin, especially when minors are involved? The case that divided Italy. The family, of Australian and British origin, had been living in a forest in Palmoli since 2021. The house was precarious but, according to themenough: electricity with solar panels, well water and an outdoor composting area as a toilet. In autumn 2024, all were hospitalized due to accidental mushroom poisoning. That episode set off alarm bells for social services. According to Corriere della Seraa technical report described the home as “ruin” and “without adequate conditions for minors.” That’s when social services intervened. The lack of schooling of the minors, the absence of pediatric follow-up and the almost total isolation in which the family lived set off all the alarms. Following these reports, a court in L’Aquila ordered in November the withdrawal of parental authority and the transfer of the children to a center, where the mother could stay next to them. The decision has caused a real political earthquakewhere political leaders and several judicial associations denounced pressure from the Government. At the same time, more than 150,000 people signed online petitions demanding that minors return to their parents. Off-grid: from bucolic dream to global phenomenon. To understand the background, just open Instagram. As Ethic magazine explainsit is enough for the algorithm to detect a certain interest in self-sufficiency to fill the feed of videos of families drying their own food, women showing their renovated campers or couples who live half a year off what they grow and collect. life off-grid or “self-sufficient” has become an aesthetic, philosophy and even aspiration for emotional disconnection. But it is also political. The same medium reminds that a small part of the movement arises from groups “sovereign citizen“who reject the authority of the State. They are a minority, but they exist. The majority, on the other hand, opts for the off-grid for reasons of sustainability, teleworking, search for autonomy or reaction to the climate crisis. Also out of fear: there are communities —like the ecovillage of Tamera, in Portugal— that are preparing for a possible collapse of the current model. In Sweden and Finland, the governments have released official guides to prepare for extreme scenarios. Spain is not far behind. The movement off-grid It has also taken root. It is no longer a thing of hippie ecovillages of the 90s: today it is embraced by engineers, teleworkers, urban families suffocated by the cost of living and foreigners from northern Europe who seek autonomy and nature. In the Karrantza valley (Bizkaia), for example, a family left town to produce their own energy and grow their food, a model that is repeated in the Basque Country, Cantabria or the interior of Spain, where many opt for hybrid solutions—solar panels, wood stoves and water recovery—combined with public school and community life. At the same time, ecovillages such as Matavenero, Lakabe or Arterra Bizimodu, according to elDiario.esconsolidate rural repopulation based on sustainability and self-management. And adding to this trend is the arrival of new off-griders foreigners. As Euroweekly points outmore and more British, German or Dutch families buy farmhouses in Catalonia, the Alpujarra or Castellón to disconnect from the grid. Some stories border on the epic: an English couple built their life from scratch with yurts, dry toilets and rain catchers. What they are looking for – a lower cost of living, teleworking, autonomy or simply another way of living – comes with a price: living with wild boars, storms and no less bureaucracy. But legally how is the matter? The contrast with Italy becomes evident when Spanish regulations are analyzed. In energy matters, the framework is clear: Royal Decree 244/2019 It allows self-consumption and does not require contracting electricity supply. Living with isolated solar panels, batteries or small generators is perfectly legal as long as the installation meets safety standards and is carried out by a licensed professional. Legalization is not strictly mandatory, but it is advisable to access public aid, obtain certificates or take out specific insurance. Something similar happens with water. The Water Law establishes that groundwater is public domainso any well—with few exceptions—must have authorization from the corresponding Hydrographic Confederation. Drilling without a permit or extracting water from a protected aquifer can lead to significant penalties. In other words, you can live with your own well, but the collection must be regularized. The point that makes the difference. When it comes to housing, living in a remote area is not illegal as long as the construction has the necessary documentation: license, occupancy certificate and minimum health and safety conditions. But if minors live in that environment and the house presents risks to their well-being, authorities can intervene. However, the determining point is in education as in Italy. Unlike other European countries, Spain required by law that all minors between 6 and 16 years old are educated in recognized centers. He homeschooling is not regulated and, in practice, it is considered illegal. A family that decided to educate their children exclusively at home would face truancy proceedings, visits from social services and even judicial measures in serious … Read more

China has a gigantic desert in Tibet with countless hours of daylight. And he’s filling it with solar panels

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A year ago we had in Xataka how a huge solar park in the Chinese province of Qinghai, in the heart of the Tibetan plateau, served as an ecological experiment: under the panels, the shade retained moisture and made vegetation sprout in the middle of the desert. Today, that same place – the Talatan Solar Park – has become something much greater. It is the largest clean energy facility on the planet, a “blue sea” of silicon that already covers more than 600 square kilometers at three thousand meters above sea level. Where before there was nothing, China is lifting an energy ecosystem without comparison in the rest of the world. The scale has multiplied. Where last year there was talk of a 1 gigawatt solar park, today a complex extends that reaches 15,600 and 16,900 megawatts and continues to expand. Its area – between 420 and 610 square kilometers – is seven times that of Manhattan. Furthermore, it is not alone since 4,700 megawatts of wind energy and 7,380 megawatts of hydroelectric dams are deployed around it, completing an unprecedented hybrid system. The result: enough renewable energy to supply almost all of the plateau’s needs, including the data centers that power China’s artificial intelligence. According to CleanTechnicaevery three weeks China installs as many solar panels as the entire capacity of the Three Gorges Dam, the largest hydroelectric project in its history. A global clean energy laboratory. The Tibetan plateau, with its pure, cold air, has become the most ambitious energy laboratory in the world. There, China is experimenting with an electricity production model based exclusively on renewables. Electricity generated in Qinghai—40% cheaper than coal, according to the NYT— powers high-speed trains, factories, electric cars and data centers. In fact, the region is home to new computing centers dedicated to artificial intelligence, which consume less energy thanks to the altitude and low temperatures. “Hot air from servers is used to heat other buildings, replacing coal-fired boilers,” explained Zhang Jingang, vice provincial governor. In the words of Professor Ningrong Liu, in his column for the South China Morning Post: “China is not only leading the transition to green energy; it is building the 21st century energy scaffolding that sustains its industrial leadership in electric vehicles, batteries and solar technology.” Three sources that beat in unison. The magnitude of the project is only possible thanks to centralized planning that combines three main sources: solar, wind and hydroelectric energy. During the day, Talatan panels capture more intense solar radiation than at sea level; At night, thousands of wind turbines collect the cold breezes that sweep across the plains. When both systems fluctuate, hydroelectric dams balance the grid. Also, from the New York Times They described a system reversible pumping: excess solar energy during the day is used to raise water to reservoirs located in nearby mountains, which release that water at night to generate electricity. And under the panels, life returns. The shade of the plates reduces evaporation and soil erosion. According to China Dailythis year the vegetation has recovered up to 80% and 173 villages have benefited from the associated livestock farming. A local shepherd, Zhao Guofu, said: “My flock has grown to 800 sheep and my income has doubled since I grazed between the panels.” The perfect geography for the sun. No other country has taken solar generation to similar altitudes. The altitude plays in favor of physics, at 3,000 meters the air contains fewer particles that block light and the low temperatures reduce the thermal loss of the panels. This efficiency is multiplied in Qinghai, one of the few areas of the Tibetan plateau with large plains, where it is possible to build without the limits of the mountainous relief. The Talatan Desert, once an arid and worthless land, has become an energetic jewel. local authorities offer symbolic leases and have developed roads and high-voltage lines connecting the plateau with the industrial centers to the east. That energy travels more than 1,600 kilometers to factories and cities. According to CleanTechnicaChina already operates 41 ultra-high voltage transmission lines, some longer than 2,000 miles and up to 1.1 million volts. The global scale: no one comes close. Other countries have tried to generate clean energy at altitude, but with modest results. Switzerland, for example, inaugurated a small solar park in the Alps, at 1,800 meters, with barely 0.5 MW. For its part, in the Chilean Atacama Desert, a 480 MW project operates at 1,200 meters. By way of comparison, the Talatan complex multiplies the capacity of the Bhadla Solar Park in India, and for more than seven that of the Al Dhafra Solar Park in the United Arab Emirates, which until recently held records. The superpower of clean energy. China produces and consumes more renewable energy than any other country on the planet. In 2024, was responsible of 61% of new solar installations and 70% of global wind power. That same year, it achieved the capacity targets it had set for 2030. In the first six months of 2025added 212 GW solar and 51 GW wind, and the country’s carbon emissions fell for the first time. In this context, Talatan Park is both a symbol and an infrastructure. China is exporting its renewable technology around the world, from Asia to Africa, following the logic of Belt and Road Initiative. For the academic Ningrong Liu: “China wants to stop being the world’s factory to become the engine of the world’s factory.” It is not just about manufacturing panels, but about selling the complete model: engineering, financing and know-how to build green networks in other countries. The less visible side of the miracle. It’s not all clean energy and pastoral harmony. In its report, The New York Times recalled that access to Tibet remains strictly controlled by the Communist Party, and that Western media were only allowed to visit Qinghai on a government-organized tour. There are also human and environmental costs. CleanTechnica documents how the giant power lines that transport energy from west … Read more

Madrid consumes more and generates less energy than anyone else. And their neighbors are also refusing to install solar panels.

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Between the grain fields and the family housing estates of eastern Madrid, the residents of Villalbilla and Torres de la Alameda live a battle that is repeated in many corners of Spain: that of a territory that wants clean energy, but afraid of losing his identity. In short. On the banks of the Viso, a residential and natural area closely linked to family life, a macro photovoltaic solar plant is planned of 70.8 megawatts promoted by Envatios Promotion XXIV SL, a subsidiary of the Swiss multinational Smartenergy. The project, known as “Envatios XXIV – Phase III”, would occupy about 335 hectares of agricultural and natural land, the equivalent of more than 470 soccer fields, between both municipalities. The resolution that grants the declaration of public utility was published in the Official State Gazette, a step that paves its execution. However, the approval has set off alarms in the area: Neighborhood platforms and associations have begun to mobilize to stop what they consider a threat to their environment and quality of life. The spark of conflict. The Platform for the Defense of Visibility complaint the “lack of transparency and absence of participation” in the processing of the project. They claim that Villalbilla City Council was not even formally notified during the process, a defect that could have legal consequences. The macro project, they explainwill cause possible environmental and social risks: local increase in temperature due to the reflective effect of the plates, noise pollution, loss of vegetation and risk of fires. At the information meeting held on October 7, the technicians and neighbors summarized their position in a phrase that has become the movement’s motto: “We are not against solar energy, but rather its poor location. Energy yes, but with common sense.” A wave of institutional opposition. Neighborhood rejection has found a political echo. Villalbilla Town Hall approved a motion against the project with the support of 17 councilors from different parties. The decision reflects the concern shared by residents and municipal representatives regarding the environmental and landscape impact. A few days later, the council announced that it will present an appeal to the Ministry for the Ecological Transition (MITECO). It has also maintained contacts with the Government Delegation in Madrid and has requested a review of the process. On his Facebook page, the mayor, José Luis Luque Lorente, qualified the situation: “The plant is located in Torres de la Alameda. In Villalbilla no permanent facilities are implemented, only some plots will be temporarily affected as accesses during the works.” Even so, the council has joined the mobilizationarguing that any large energy infrastructure must be done with planning and consensus. ANDon the other front. The promoting company has with the favorable environmental impact declaration and that its capacity—70.8 MW—could supply the annual electricity consumption of some 90,000 homes. Some landowners have already signed rental contracts with the developer. “The project is unstoppable, and it is better to make a profit,” one of them explained to Infobae. The debate has even divided the municipalities themselves: while Villalbilla and Torres prepare legal appeals, Mejorada del Campo has chosen for negotiating with the company. This last municipality has achieved reduce plant size by 40%, establish a local employment plan and compensation of 3.8 million euros. Even within the regional administration itself there are divergences: the General Directorate of Environmental Quality of the Community of Madrid issued a favorable report, while the General Directorate of Agriculture considered it unviable for affecting woody crops and recommended finding another location. The dilemma of the landscape. The Platform for the Defense of Viso insists that the problem is not solar energy itself, but the model of massive implementation without territorial planning. As we well knowthe debate is not new. In a forum for El País, energy expert Eloy Sanz warned that “rejecting almost any renewable development is a mistake,” and that “the less renewables, the more fossil fuels.” But he also criticized the use of the term “macro” as an emotional label: “The prefix ‘macro’ is key on an emotional level, regardless of the actual size of the project.” The dilemma extends throughout Spain. The motto “Renewable yes, but not like this” has caught on in rural areas of Andalusia, Aragon and Galicia. In Jaén, neighbors and farmers oppose an installation that would involve cutting down more than 100,000 olive trees. In Galicia, the Supreme Court provisionally suspended a wind farm for failing to evaluate its cumulative impact on the territory. The conflicts share a pattern: rural communities that support the energy transition, but demand order, transparency and balance. It will have to be distributed. The point is that the case of Villalbilla and Torres de la Alameda has an additional paradox: it occurs in one of the regions that produces the least energy and consumes the most. The Community of Madrid generates only 4.8% of the energy it usesbut it concentrates 11% of national demand. Meanwhile, other areas of the country—Extremadura, Aragón, Castilla-La Mancha or Andalusia— support the thickness of electricity generation. This shows that the background is the same: an energy transition that advances at an uneven pace and with little territorial planning. As the country seeks to meet 2030 climate goals, local communities are demanding a say in how and where their environment is transformed. “We want a just transition.” That is the phrase most repeated by the residents of Viso. His message coincides with that of many citizen movements that have emerged throughout Spain: support for renewables, but with respect for the territory. Maybe the key is in what pointed out Eloy Sanz: “The dilemma is not between progress or landscape, but between doing it well or doing it badly.” Between climate urgency and fear of change, Villalbilla and Torres de la Alameda embody a question that Spain has not yet resolved: how to achieve clean energy that is also fair? Image | Unsplash Xataka | The Altri megaplant has caused an enormous social response in Galicia. And now the Government has given … Read more

What if we have made a mistake with the orientation of the panels? Two projects in the Valencian Community are testing it

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For decades, solar panels have looked to the sky with an almost religious inclination. But, what if the error was precisely that? What if the future of solar energy lies in putting them on their feet? Position is everything. The Norwegian company Over Easy Solar and its Spanish partner Albricias Energía have installed the first two vertical solar systems in the Valencian Community: one in the Elche business park and another on the roof of a residential building in Bétera. The idea of ​​raising the panels is not only aesthetic: it responds to a practical need. In cities there are more and more flat roofs and fewer sloping roofs, and in the countryside, agrivoltaics seeks to free up soil for crops. In this context, verticality is becoming a solution that is as logical as it is efficient. The logic behind the vertical panel. Its promise is as simple as it is disruptive: assembly in 15 minutes per kWp, without tools or ballasts, and with a design that does not pierce the roof or alter its tightness. The panels, manufactured with heterojunction (HJT) cellsreach an efficiency of 22% and a bifaciality of 92%, that is, they capture solar radiation on both sides. In addition, being in a vertical position, they dissipate heat better, which translates into better thermal performance. At the Elche facilitythe modules were placed with an east-west orientation, so that one side receives the morning sun and the other the evening sun. That generates two daily production peaks —one around 10:00 and another around 8:00 p.m.—, just when domestic electricity demand is usually highest. While traditional panels reach their maximum at noon and fall when more energy is needed, the vertical ones fill those production “valleys”, reducing dependence on batteries or the electrical grid. Production curves of the Elche facility Source: Over Easy Solar Beyond the angle. Furthermore, their shape and geometry make them almost immune to dirt, hail or wind, and as they do not require screws or ballasts, they can be easily dismantled if the roof requires maintenance. The Fraunhofer ISE Institute has endorsed that this configuration does not compromise structural stability, which reinforces its technical feasibility. According to Over Easy itselfvertical solar installations are becoming a value option for both urban rooftops and large-scale or agrivoltaic projects, and offer competitive capture rates and payback periods compared to conventional photovoltaics. The vertical spin expands. It is not an isolated idea. In California, the Sunstall company has developed Sunzauna system of vertical bifacial panels designed to combine agriculture and energy. The project, installed in a vineyard in Somerset, uses modules that generate electricity on both sides and allow cultivation under partial shade, reducing UV stress on the plants and taking advantage of the land for both uses. The principle is the same: more usable surface area, less heat, less maintenance and a more stable production curve. And, furthermore, with added value: keeping the land available to produce food. In urban environments, verticality also makes its way. The Canadian Mitrex SolarRail has launcheda bifacial solar railing system that turns balconies into small energy generators. With transparent and opaque versions, these modules integrate photovoltaics into the architecture without altering the design of the building or taking up additional space. The technology that makes it possible. With twist or without it, all recent proposals point in the same direction: bifaciality. HJT (heterojunction) cells combine crystalline and amorphous silicon to make better use of reflected light and reduce temperature losses. This symmetrical structure allows energy to be generated from both the front and rear of the panel, something essential for vertical systems or systems integrated into facades. And it doesn’t stop there. New advances, such as bifacial perovskite panels developed by the Indian Institute of Technology (IIT) Dharwad, could make these solutions even cheaper and better. Will the future be vertical? Verticality does not seek to replace traditional photovoltaics, but rather to complement it. It allows energy to be produced when it is needed most, reduces the visual footprint and increases generation on already saturated roofs or in buildings without inclination. In the words of Pablo Sánchez-Roblesfounder of Albricias Energía: “Over Easy systems can complement already executed installations, increasing generation without changing the inverter.” Maybe in a few years we will look at the sloping roofs and think that the panels always wanted to be standing. After all, the sun rises in the east and sets in the west. Image | Over Easy Solar Xataka | Quantum find in Cambridge points to solar ‘Holy Grail’: single-material solar panels

single material solar panels

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At a time when renewable energy is beginning to gain a lot of strength, achieving solar panels light, efficient and cheap It is undoubtedly the “Holy Grail” of current scientific research. Now some researchers from the University of Cambridge They just unlocked a quantum secret buried for more than a centurywith results capable of completely transforming how we capture and convert sunlight into electricity. Unexpected. The advance arises from a observed quantum phenomenon in an organic material called P3TTM, a spin radical moleculethat is, it has a solitary and unpaired electron from the rest, which we can say is “antisocial.” This material is typically used in organic light-emitting technologies (such as LEDs) for its intense luminosity and chemical stability. What is surprising in this case is that when many of these molecules are grouped together in a thin film, their unpaired electrons interact with each other in a very particular way. And instead of ignoring each other, they align in an alternating pattern (up-down), a quantum behavior known as that of a Mott-Hubbard insulatorsomething that until now was mainly associated with inorganic metal oxides. Biwen Li, the principal investigator of the Cavendish Laboratory, describes it as “true magic.” Upon absorbing light, one of these electrons jumps to a neighboring molecule, instantly creating a positive and a negative charge. Those separate charges are, in essence, electricity ready to be harvested. The revolution. Most of today’s organic solar panels work like a sandwich. They need two different materials: one that “gives” electrons when light hits it and another that “accepts” them. This union, or heterojunction, is essential, but it is also a source of inefficiency since it greatly complicates the manufacturing of the equipment. The Cambridge discovery changes everything. The P3TTM performs the entire process itself. He doesn’t need a partner. Charge separation occurs between identical molecules, a process called “homojunction,” which opens the door to that efficiency that was the goal of much energy research. How it works. If we look at the technical part, we can know that P3TTM films are manufactured using thermal evaporation techniques and are encapsulated for protection. Timed spectroscopic analyzes show two emitters: one at 645 nm due to the exciton of the radical, and another with late emission and red shifted (~800 nm), attributed to the recombination of separated charge pairs after the charge transfer process. The collection efficiency under reverse polarization reaches 100%, indicating that practically every photon is converted into an electron usable to generate current, something never before achieved in organics. The test. To test it, the team built a solar cell with a thin layer of P3TTM and, by illuminating it, achieved a charge collection efficiency close to 100%. This means that almost every photon of light that hit the material was converted into useful electrical current. The story. The theory on which this discovery is based, which is the Mott-Hubbard theory of insulators, was developed by Sir Nevill Mott, a giant of condensed matter physics. Now this Cambridge work is published just on the 120th anniversary of Mott’s birth, paying tribute to the legacy of the man who laid the foundations for understanding the electronic phenomena in semiconductors that we will now be able to use. The future. This is not just a small advance. It’s a paradigm shift. “We are not simply improving old designs,” says Professor Bronstein. “We are writing a new chapter in textbooks, demonstrating that organic materials can generate charges on their own,” he points out. The implications we will see now could be enormous. We could be witnessing the birth of a new generation of solar technology: panels made of a single, low-cost, light and flexible material that could be integrated into any surface, from windows to clothing. There is still a way to go to reach a commercial product, but the quantum secret that they have revealed in Cambridge has just illuminated a much brighter and simpler energy future. Images | American Public Power Dynamic Wang In Xataka | Clean energy has made the electricity market cheaper. But what we pay for is no longer energy: it is stability

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