solar

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

Reopening nuclear power plants sounds very spectacular, but Google has a plan B in case it’s not enough: solar energy

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Data centers for are insatiable monsters those who are responsible for them must feed. OpenAI, Meta, Microsoft, xAI, Anthropic and Google are burning money riding colossal data centers for training and management of artificial intelligence. But these installations are not expensive to set up: they are also expensive to maintain. They require a considerable amount of energy to functionand Google has just received a ‘shot’ of renewables. All thanks to a direct connection to the largest system in the United States. Renewables to power AI. Google and TotalEnergies have just signed a agreement of energy purchases for 15 years. The contract stipulates that the energy company will deliver 1.5 TWh of electricity from its Montpelier solar plant, in Ohio, to Google. The plant is still under construction and they estimate that it will have a capacity of 49 MW, but the most important thing is that it will be connected directly to the electricity system. PJM. It is the largest network operator in the United States. It covers 13 states and data centers are representing a relevant portion of the operator’s pie: in its last annual auction, the load of these facilities PJM capacity sale triggered at 7.3 billion dollars, 82% more. Astronomical needs. In the statement from TotalEnergies, the company that this agreement illustrates its ability to meet the growing energy demands of the major technology companies. The problem is that it is not enough. If we focus on Google, the consumption of its data centers was 30.8 million megawatt hours of electricity. The company has been focused on AI for years, but the recent ‘boom’ has made it double what its centers consumed in 2020 (14.4 million MWh). Currently, data centers are estimated to account for 95.8% of Google’s total electricity budget. But it’s not just Google: the International Energy Agency esteem that global data centers consumed 415 TWh last year, representing approximately 1.5% of global electricity consumption. It seems little put in percentage, but Spain consumed in 2024 231,808 GWh, or 231 TWh, in 2024. The data centers of a handful of companies alone consumed twice as much as an entire country. And the estimate is that this data center consumption will double by 2030, reaching 945 TWh. Renewables are not enough. Now, although renewables are a support for the total energy required by data centerssolar and wind power have two limitations: intermittency and variability. Generation depends on weather conditions and time of day, meaning it fluctuates dramatically even throughout the same day. This instability clashes head-on with the high reliability and availability requirements of data centers. These are installations that must operate continuously and cannot assume cuts or Unforeseeable drops in supplysince AI or cloud storage would suffer the consequences. These renewables require backup batteries, but it is complicated and expensive to have such a large number of batteries just to power data centers. Pulling the gas and looking at the nuclear. That’s where other sources come into play. On the one hand, nuclear. In October 2024, Google signed the world’s first corporate agreement to acquire nuclear energy from SMR reactors. The first will come into operation in 230 and it is expected that, together, they will be able to satisfy the technology company with 500 MW of capacity by 2035. On the other hand, natural gas. In October of this year, the Broadwing Energy Center project began, a new natural gas power plant that will have a capacity of 400 MW and is scheduled to come into play at the end of 2029. Decarbonization and pressure. And the big question is… doesn’t the use of gas for AI clash with the technology companies’ objectives of achieving decarbonization percentages for both 2030 and 2050? We have already seen that oil companies have been getting off the renewables bandwagon because they have seen that fossil fuels are still relevant in the technology industry, but in the case of Google, they rely on the fact that projects like the Broadwing Energy Center They will have CCS systems. This means that it will have carbon capture system that will be able to permanently “sequester” 90% of the emissions. It means burying the problem, literally, since the CO₂ will be stored a mile underground. In 2020, before the AI ​​boom, the company established the goal of operating with carbon-free energy 24 hours a day, seven days a week by 2030. It will be interesting to see how they plan to offset these emissions thanks to renewables, but the IAE estimates that the demand for data centers will not stop growing in the short term and that adds another problem: a increased pressure on the electrical grid which is added as another element to manage. Because the big underlying problem is that the demand for energy is growing at a faster rate than the capacity to generate new electricity, and it is something that has an impact on companies’ bills, but also in homes. Images | Unsplash, Google Data Center In Xataka | China does not have a spending problem with AI. What it has is a huge income gap compared to its main rival

Australia’s idea to survive its own solar success

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In Australia, solar energy has gone from being the promise of the future to a problem of the present. There is so much sun, and so many panels, that the electrical grid is reeling from excess production. During the middle of the day, millions of rooftops feed electricity back into the system, generating more energy than the grid can absorb without losing stability. At that time, wholesale prices fall to zero and even negative values. The solution that the Australian government has found is as simple as it is disruptive: giving away electricity for three hours a day. The challenge of excess. Australia has been experiencing its particular energy paradox for years: the transition towards renewables has advanced so quickly that the system is beginning to suffer its consequences. More than four million homes —one in three— have solar panels on their roofs. This distributed generation already produces more electricity than all the coal plants still active. According to Reutersthe program, dubbed “Solar Sharer”, will allow millions of homes to access three hours of free energy a day, even those who do not have solar panels. “People who can move their electricity consumption to the zero-cost period will benefit directly, whether or not they have solar panels and are homeowners or tenants,” explained Energy Minister Chris Bowen. Energy for everyone. The plan is not optional for electricity companies: the Australian Government will require them to offer three hours of free electricity each day during the midday solar peak. The measure will start in 2026 in New South Wales, South Australia and southeast Queensland, and will be extended to the rest of the country if it works as expected. To make it possible, the Executive will modify the Default Market Offer (BMD)the benchmark fee that limits what retailers can charge. From now on, that rate will include a daily slot of zero cost, just when the grid is saturated with solar energy. Participating households must have a smart meter and reorganize their consumption: run the washing machine, charge the car or turn on the air conditioning when the sun is at its highest. A double objective. On the one hand, it seeks to relieve pressure on the grid and reduce emissions. According to the Financial Timesthe plan seeks to utilize excess solar capacity and rebalance the electrical grid to reduce dependence on coal and gas. Tim Buckley, director of the Climate Energy Finance think tank, called it an “obvious” measure, as it will create a “demand pool” in the middle of the day, helping to stabilize the system. The Australian Government has been committed to accelerating the energy transition for some time. In 2022, Bowen set a goal for 82% of electricity to come from renewable sources by 2030, as detailed by Reuters. Initiatives like the Solar Sharer They are added to the subsidy for domestic batteries, which will allow part of that free energy to be stored for night use. Not everyone is happy. The Australian Energy Council (AEC), the consortium that brings together the main electricity companies, criticized the Government for not having consulted the sector before the announcement. Its executive director, Louise Kinnear, warned that “Lack of consultation risks damaging sector confidence and generating unintended consequences.” Additionally, some companies fear the plan will increase network costs and force smaller retailers out of the market. According to FTemployers fear that the measure will distort competition, although defenders of the plan assure that the real risk is not acting in the face of a saturated network. Despite this, large players such as AGL Energy and Ovo Energy have shown willingness to collaborate with the Government to define the technical details. From Australia to Spain. The Australian proposal has sparked interest in other sunny countries, especially in southern Europe, where solar energy has also grown explosively. From there the inevitable question arises: can we replicate it in Spain? Being one of the largest photovoltaic powers in Europe and with negative price episodes In the electricity market, it is logical to consider this possibility. However, the Spanish electrical system goes through a phase of instability: while the south of the peninsula produces more solar energy than it consumes, the north continues to depend on gas plants, the only ones capable of providing the “inertia” necessary to stabilize the network. Although the hourly tariff system and smart meters would allow the Australian measure to be technically replicated, the European framework prevents offering free electricity directly. The price is set in the wholesale market, managed by OMIE, and the State cannot intervene except through subsidies or discounts. In short: Spain has the sun and the technology, but not the regulatory flexibility. As noted by analyst Joaquín Coronado“we have the generation of the future, but we continue to use the crutches of the past.” The global experiment. Giving away electricity to avoid a collapse of the grid may seem contradictory, but it contains a lesson about the energy transition: the problem of the 21st century will not be producing energy, but managing it. While Europe debates how to lower the bill, Australia has chosen to share its excess. If the plan works, it could become a reference for other countries with strong solar penetration, such as Spain or Italy. In the words of Minister Chris Bowen“the more people take advantage of the offer and transfer their consumption, the greater the benefits will be for everyone.” Perhaps the future of energy is not just about paying less, but about using light when the sun gives it away. Image | Unsplash Xataka | 75% of the universe is made up of unknown matter. Australia has gone down to look for him in a mine

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

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

The Alhambra and its environment are a jewel of world heritage. Now a threat has emerged: solar panels

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For decades Granada can boast of having a world category jewel, the set formed by the Alhambra, Generalife and Albaicín, registered all three in The list Unesco World Heritage. Now the city sees how clouds loom About them. And for an unexpected azón: a photovoltaic plant that, according to icomos (An organism associated with UNESCO) threatens the environment. In fact advises “Slighted” that is paralyzed. What happened? That Icomos (The International Council of Monuments and Sites) has just yielded a jug of cold water on a project that It has been weating for some time Granada local policy: a photovoltaic plant of something more than three hectares that will be built in The Farguea neighborhood of Granada. What Icomos said is that, if carried out, the installation will negatively affect the Alhambra, the Generalife and the Albaicín neighborhood, three Historical jewels included for years in the Unesco World Heritage list. Beyond its content and arguments, the warning is important because Icomos is not any entity. The Council is associated with UNESCO and is dedicated precisely to ensure the “Protection and value” of heritage. Its report also includes some ears to the Spanish authorities and has served to enliven (even more) the debate that For months surrounds a plant that has encountered the opposition of politicians, neighbors and Ecologists. What would the installation be like? The plant is called San Gregorio I and, As needed The countryI would occupy about three hectares to produce 4.95 MW. It is actually part of a broader project that includes two others facilities, stadium plus i and sotoscuro i, of a size more or less similar. The key is where it is projected: The Fargue (Alquería del Fargue), an area of ​​Granada located in the district of Albaicín. In June the PSOE proposed In full paralyzing the macroplanta to “protect the landscape and cultural heritage of the city”, especially the surroundings of the Alhambra and the Darro valley, considered a good of cultural interest (BIC) Since 2024. It is not the only one. Neighbors and Ecologists in Action also mislead the impact that the project would have in the area. What has Icomos said? That criticisms are more than founded. In your report the agency concludes that the photovoltaic plant entails “a very high risk of negative impact” for the surroundings of the Alhambra, the Generalife and the Albaicín, a set including on the UNESCO heritage list. Hence, their authors “strongly advise the stoppage of the planned actions” and give a small touch of attention to the Spanish authorities, to which they warn that they must be “much more vigilant and careful” in the face of projects that affect the protected heritage. How would the plant affect? It depends on what we are talking about exactly. The effect would not be the same in all cases. If we focus on the Alhambra, Generalife and Albaicín the problem is the visual impact. “The Alhambra is more than the fortified monumental complex. The Alhambra territory includes the general’s past Point out in The country José Castillo Ruiz, professor at the University of Granada (UGR). Is it so serious? “The visual impact of an industrial element like this goes much further than a simple discordant element (…). They seriously alter the heritage values ​​of the Alhambra as a historical set, monument and world heritage,” insists The expert, who warns of the loss of centenary olive trees or the alteration of the environment, breaking “continuity” between the Alhambra, the city of Granada, the Valley and the rest of the environment. If we speak specifically of the Valle del Darro the report, in fact warns of a clear environmental impact. Things are very different for project promoters, which They assure that the final affectation will be “minimal” and already contemplate incorporating “corrective measures.” Does it say anything else? Yes. The report remember That San Gregorio I is only one of the three photovoltaic plants that you want to boost in the area, so it slides that its promoter seeks avoid An environmental impact statement (DIA). In total the three photovoltaic plants will approach (although staying below) of the ten hectares that would require activating that procedure. As for processing, icomos insists in which it does not arrive with opening a public exposure process “without effective advertising”. The ideal is to find a way to guarantee “a public participation” during the process, a “real nature”. Why is it important? The controversy around the plant It is not new. A months ago environmentalists and neighbors They already warned of their impact on the territory, the olive groves and holm oaks, biodiversity and even spoke of “disorder and speculation.” The Icomos report is relevant because it has fueled the debate and oxygen to critics, For whom The document “Raises Project death certificate”. Right now its promoters They are pending of construction permits (in which the City Council plays a key role) and the resolution of allegations. Their critics rely on the ICOMOS document for claim That the Alhambra Board or the rest of the institutions move token, which goes even to transfer their complaints to UNESCO itself. Images | Wikipedia (Jebulon) and Sharon Mollerus (Flickr) In Xataka | Mediterranean countries seemed ideal for solar panels. Until the dust storms arrived

In his career for the total domain of the solar panels, a rival has come out: the Spanish Perovskita

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The sun will continue to shine, but the way we take advantage of it is changing at vertigo speed. While China and other countries are focused on improving the efficiency of Perovskita solar panels, Spain has set the point of solving another great challenge: stability. And he does it with a clear message: say goodbye to the silicon. Jubilating the silicon. Until now, talk about solar energy It was talking about silicon. Today, that equation begins to break through the Perovskita. In Madrid, an Imdea Nanocencia team has achieved that a cell reaches 25.2% certified efficiency, almost matching The world record of 26.7%. With this, Spain enters the first line of the race for the solar future. Not only that, they have also manufactured a mini-modulus of 25 cm² that maintains an efficiency of 22.1% and extraordinary stability, something that historically has been the Achilles heel of this technology. “These cells already exceed the commercial silicon, which barely reaches 18% efficiency, and open the door to the next generation of solar panels,” explains Nazario Martín, principal researcher of the project. The jump is not only academic. In research, Published in Advanced Materialsthey explain that Perovskita promises to reduce costs, be flexible, light and recyclable, in front of the silicon, whose production process is expensive and controlled almost exclusively by China. But the essential here is not so much efficiency and durability. The cells developed with the new PTZ-FL material maintain 95% of their performance after 3,600 hours of tests in demanding conditions (ISOS-D-1 protocol). In other words, we do not talk about fragile laboratory prototypes, but of devices capable of resisting the passage of time under sun, humidity and heat. The fund of the project. The advance is based on the design of molecules called Spiro-Fenotiazines, which act as “hollow transporters”, an essential layer in the solar cell. The PTZ-FL compound prevents lithium-ion migration, which is usually one of the main causes of degradation. In the words of the researchers, it is about building a “compact interface” that protects the material and improves its efficiency. In practical terms, it means that Perovskita modules are not only more powerful, but also much more resistant. China takes the lead. As he advanced above, China has focused its efficiency efforts. A study by the Huazhong University and Technology achieved a 28.8% record With a tandem cell totally from Perovskita, without silicon. This type of advance, such as Spanish, confirm that Perovskita can not only compete with silicon, but to overcome it in scenarios where it never shone: facades, windows, offices or even portable devices. There are very specific challenges. Beyond laboratory records, the great challenge is to bring this technology to the market. Today, the European Union depends largely on China to manufacture solar panels, According to an Ember report. Projects such as IMDEA not only seek efficiency, but also reduce this strategic dependence. In addition, the most expensive component of a solar panel is no longer silicon or glass, but aluminum frames, which represent 14% of the total cost. A reminder that the transition to Perovskita will require innovations not only in laboratories, also in factories and supply chains. Forecasts The solar future is no longer written with silicon. Perovskita has gone from being a fragile promise to real candidate for the market. The question is not whether it will come, but how and from where. Spain, with the advancement of IMDEA nanocencia, wants part of that response to have European seal. Image | Freepik Xataka | India needs more crops and solar energy than any other country. So you are installing solar panels in height

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