electrical

The US electrical grid depends on Chinese devices. And that worries their national security

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United States national security has always been measured on aircraft carriers, missiles and satellites. Today, however, a growing part of that security depends on something much more everyday: electricity. The grid that powers homes, hospitals, data centers and military bases is going through —despite political resistance from the Trump administration— an accelerated transformation towards renewable sources. But that transition, key to the country’s energy future, has introduced a silent vulnerability. The back door open. The expansion of solar energy has made the US electrical grid depend massively of inverters made in China, essential devices for converting solar energy into electricity usable by the grid. They are not simple pieces of hardware: they are digital systems, connected, with software, remote communication capabilities and, in many cases, manufactured by companies with direct or indirect links to Beijing. For years, this dependency was seen as an industrial or commercial problem. Today, for those responsible for national security, it has become something very different. The agency notice. The Cybersecurity and Infrastructure Agency (CISA), the National Security Agency (NSA) and the FBI published a joint notice in which they alleged that cyber actors sponsored by the People’s Republic of China had compromised and maintained persistent access to critical US infrastructure. The identified group, known as Volt Typhoonhad managed to infiltrate organizations in key sectors such as energy, water, transportation and communications. The objective was not to steal data or obtain financial benefits. According to the security agencies documentthe behavior detected “is not consistent with traditional espionage” and points, with “high confidence”, to a different strategy: enter critical systems, remain hidden for long periods and wait. Wait for a crisis or conflict scenario in which those same infrastructures may be interrupted or degraded. It’s exactly the scenario that FBI Director Christopher Wray has described before Congress warning that China is positioning itself to attack American civilian infrastructure as part of its strategic planning. From stealing secrets to preparing chaos. For years, cyber activities attributed to China focused on the theft of intellectual property and trade secrets. Today, according to security officialsthe objective is different: to create the ability to cause internal chaos in the United States and limit its room for maneuver in a conflict, especially in the Indo-Pacific. The systems attacked by Volt Typhoon—such as ports, regional power grids, or water utilities—have no immediate economic or political value. Precisely for this reason, experts conclude that the only reason to infiltrate them is to be able to sabotage them later. It is not necessarily about causing a national blackout. As government sources explainselective interruptions, cascading failures or highly visible incidents would be enough to generate social panic, put pressure on policy makers and condition decision-making. Towards the transition. The U.S. power grid is increasingly reliant on solar inverters and storage systems—so-called investor-based resources— which are not simple pieces of hardware. They are digital, connected systems that regulate the flow of energy, stabilize the frequency and constantly communicate with other elements of the network. According to the In Broad Daylight reportprepared by Strider Technologies, since 2015 China has exported nearly 2.68 billion kilograms of inverters to the United States, dominating two-thirds of the world market. To understand the scale of the phenomenon: 86% of electricity companies analyzed by Striderwhich represent about 12% of the installed capacity in the United States, use at least one Chinese supplier considered risky. Together, these devices are present in 5,400 megawatts of solar capacity spread across 22 states, enough electricity to keep more than a million homes powered for a year. The concern is not trivial. A Chinese manufacturer remotely disabled inverters installed in the United States and other countries amid a contract dispute, demonstrating that manufacturers retain operational control on already deployed equipment. Furthermore, research cited by The Washington Post reveal the existence of undocumented communication components in some inverters, capable of connecting to external networks without the operators’ knowledge. According to Striderthe problem is compounded because Chinese academic and military institutions have produced thousands of studies on foreign power grid vulnerabilities, many of them focused on deliberate disruption scenarios. China has come forward against the accusations. A spokesman for its embassy in Washington responded to Reuters and Washington Post rejecting that there is a security problem and denouncing what he described as a “generalization” of the concept of national security to discredit Chinese advances in energy infrastructure. Beijing has not announced technical reviews, external audits or changes to the control mechanisms of these devices. A dilemma without a simple solution. In the short term, US authorities have ordered electric companies to limit or monitor external communications from these devices. However, as officials recognizethe fragmentation of the electricity sector—with thousands of operators and unequal standards—makes a uniform response difficult. In the medium term, the dilemma is more complex. A massive recall of Chinese hardware could put energy supplies at risk at a time of strong demand growth. Maintaining it implies accepting a strategic vulnerability. In the long term, the consensus among analysts is clear: energy is no longer just an economic or climate issue, but a matter of national security. As Strider’s report concludesensuring the transition to clean energy without creating new strategic dependencies has become a defensive priority. The new dimension of national security. The US power grid does not need to be attacked tomorrow to become a pressure tool today. The vulnerability already exists, integrated in the form of everyday devices, invisible to the end user but critical to the functioning of the country. The question raised by the official documents themselves is not whether that capacity will be used, but in what context and for what purpose. Because, in the strategic competition of the 21st century, the control of energy can be as decisive as the control of territory. Image | Unsplash and freepik Xataka | The US and China are involved in a controversy over renewable devices: what we know (and, above all, what we do not know) so far

Asturias has the electrical network so saturated that a simple failure would be enough to put the supply in check this summer

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A year ago everything indicated that Asturias was going to become the new Spanish energy storage hub. But these plans, which were going to help integrate renewables, alleviate the grid and attract industry, collided with reality. Today, the panorama is very different. Not only has the region paralyzed new storage facilities, but an official report has just confirmed a more worrying diagnosis: Asturias is saturated with energy, but does not know where to put it. In short, the central area’s electrical grid is at its limit. The CNMC uncovers the problem. The trigger It is an apparently technical conflict between EDP (Hidrocantábrico Distribución) and Red Eléctrica de España for access to the Carrió substation. As local media have reportedthe distributor requested to replace two transformers to increase its capacity from 513 MW to 665 MW, but REE rejected it, arguing that the network could not supply so much simultaneous demand. This rejection took the case to the National Markets and Competition Commission (CNMC), which issued a resolution with a forceful message: the transport network in the central zone is saturated, it cannot grant new permits, there is “relevant overcapacity” and there is a “risk to the security of supply in the event of a simple failure, in the summer season.” Furthermore, the commission itself recognizes that the case dates back to 2007, when the separation between distribution and transportation occurred and assets were transferred to REE without documenting the guaranteed access capacities. As the official report explains, for years REE and EDP operated “as always”, but with opposite interpretations about how much capacity was really assured for the Asturian network. What does it mean to be saturated? Although it may seem like a technical concept, the CNMC has detailed in its report a more precise image of what is happening. To begin with, saturation means that the network cannot grant even one more access. The regulator detects a “total saturation of capacity, without the possibility of granting new access or connection permissions.” This means that no new industries, no renewable parks and no storage projects can connect: the grid is literally full. Added to this blockage is another underlying problem. The central Asturias network does not meet the minimum legal criterion known as N-1, which requires guaranteeing supply even if a key component fails. However, the CNMC itself confirms that this requirement is not met: If a transformer or main line falls, there is no alternative path capable of absorbing the energy, making any incident a potential risk. The situation is even more delicate according to the data. The regulator’s report indicates that two large electro-intensive consumers already absorb 686 MW, to which we must add the 200 MW that EDP needs to feed the distribution network. In total, more than 800 MW connected. The problem is that the safe capacity in summer – when the lines perform worse due to high temperatures – is 754 MW. In other words: there is more connected power than the network can safely support. And the room for maneuver is practically non-existent. According to the CNMC, if Cardoso’s 400/220 kV transformer failed, the entire area would be supplied only by a 220 kV line that does not support current consumption in summer. In practical terms, this means that any simple failure could trigger a real supply problem in the middle of the summer season. The point is that there is energy, but it cannot be moved. The paradox is evident: Asturias wants more renewables, it wants batteries, it wants to electrify its industry and it wants to attract new strategic projects. But all this growth requires a robust electrical grid with margin. And right now, that margin does not exist. Carrió’s transformers could handle more power, yes, but that is unimportant if the lines that connect them are already at their limit. Even the future conversion to gas of the Aboño thermal power plant —designated by the Principality as future relief— does not solve the current problem, because the bottleneck is in transportation, not in generation. How did we get here? In addition to the historical conflict between REE and EDP, a chain of factors have aggravated the situation. One of the most decisive is the increase in power assigned to some large industrial consumers. In 2022, Red Eléctrica granted an electro-intensive customer an increase of 132 MW, reaching 450 MW of power between Carrió and Tabiella. The regulator clarifies that this decision did not violate the regulations, but it does highlight the lack of coordination with EDP, which was not informed and saw how the capacity margin of the area was exhausted practically at once. Added to this problem is another longer-term problem. As El Comercio remembersthe necessary reinforcements for the central network have been planned for more than 20 years, but were never executed. The result is that Asturias faces industrial electrification and the growth expected for the coming years with a network that has not been updated at the pace of demand. The evolution of the local generation. The situation is complicated as cogeneration, a key technology for producing electricity and heat near industrial centers, has collapsed. According to figures published by El ComercioAsturias has lost 82% of cogeneration production in six years. This implies less energy generated at source and, therefore, more need to bring electricity from outside through a network that is already saturated. The economic and environmental impact is also notable: 60 million euros less industrial turnover and 230,000 additional tons of CO₂. And now what? The Asturian Government insists that the problem will be resolved with the 400 kV central ringa gigantic infrastructure included in the energy planning for 2030. This ring will double the electric transportation capacity in the metropolitan area and will allow it to absorb the planned industrial growth. For its part, Red Eléctrica you already have authorization for the new Cardoso substation, key to that ring, with an investment of 26.5 million euros. However, the CNMC warns that the problem is … Read more

Spain needs to modernize its electrical grid, so the remuneration rate has increased. The effect will be noticeable in the next five years

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Until now we have observed the electricity bill as has increased after the April blackout. But this time the focus is not on the receipt, but on a silent decision that the National Markets and Competition Commission (CNMC) has just made and that will determine how much it will cost to keep the light on in the next five years. Piecemeal. The CNMC has sent to the Council of State the circulars that establish how the transport and distribution of electricity is remunerated between 2026 and 2031, the so-called “network business”: the towers, cables and transformation centers that make it possible for energy to reach homes, factories and hospitals. The technical detail is a figure: 6.58%. This new percentage – up from 5.58% – is, according to the regulator, an update that better reflects current financial conditions, after a period of rising interest rates. However, the measure is far from the 7% or 7.5% requested by the large electricity companies grouped in Aelec (Iberdrola, Endesa, EDP and Naturgy) and that the small distributors represented by CIDE also claimed. And in the pocket? Good question. These circulars, which will come into force on January 1, 2026 if the Council of State does not introduce changes, define the remuneration criteria for the entire period 2026–2031. In the short term, the increase will not be directly noticeable on the bill, but it will influence the regulated costs that support the electrical system and that we all pay. According to CNMC calculationsthe impact of the change will be between 0.9% and 1.1% of the total annual costs of the system, depending on the level of investment. The purpose of this rate is to guarantee that companies that maintain and expand the electrical network receive a reasonable return on their invested capital. If the percentage is too low, investment is discouraged; If it is too high, the costs of the system and, in the long run, the consumer’s bill increase. The regulator look for a balance point: enough attractiveness for lines to continue being built and reinforced, but without transferring an extra cost to homes. A change in calculation. For the first time, historical data and future forecasts will be combined to estimate the cost of companies’ debt, rather than relying solely on past interest rates. New components are also incorporated: transaction costs (such as commissions for issuing debt), the so-called cost-of-carry (cost of maintaining financial positions) and a correction due to the European Central Bank’s bond purchase programs, which had artificially reduced the profitability of public debt and, therefore, the risk-free rate. According to the organizationthis is a “more realistic” methodology that incorporates recent market volatility. The change will be applied in a phased manner during the six years of the new regulatory period and expands the margin of recognized investment, including not only new infrastructure but also improvements and optimization of existing ones. The goal: keep bills contained while the network is modernized. The “K parameter”. Beyond the technicalities, what is at stake is Spain’s ability to electrify its economy without skyrocketing the bill. The CNMC has set it at 257 euros per connected kilowatt, compared to 232 euros in the previous draft. The companies maintain that the real cost is around 375 euros/kW, so the improvement falls far short. This parameter determines how many industrial projects, data centers or new homes can be connected to the network without the connection being economically unfeasible. According to the employerlimiting remuneration to that level “prevents connecting part of the new consumers” and can put the competitiveness of entire sectors at risk. This has been the response. Aelec expressed its “deep concern” and warned that the new circulars “compromise the electrification and industrial development of the country.” The employers insist that the rate is still below European levels – between 6.8% and 7.5% – and warns that “it discourages investment just when the country needs to deploy more electrical infrastructure.” More than 67 business and social associations have joined his call. In a manifesto cited by Aelec itselfwarn that, if conditions are not reviewed, “the Spanish electricity networks could collapse.” The employers’ association also criticizes that the CNMC has reduced the recognized maintenance costs by 37%, which, in its opinion, may deteriorate the quality of the service and stop the connection of new clients. For its part, the CNMC maintains that its obligation is to protect the consumer and guarantee the sustainability of the system. The organization seeks to “limit the impact of investments on customer bills” and remembers that everything that electricity companies invest in these networks is paid as fixed charges on the electricity bill. The balance, the regulator insistsconsists of remunerating the necessary investments without overloading the end user. A decision with long-term effects. Behind this technical dispute lies a fundamental question: can Spain electrify its economy at the necessary pace without increasing the remuneration of the networks? The Government has launched a plan to increase investment in networks by 62% until 2030, with around 13.6 billion euros to reinforce the national network, as El Economista recalled. However, Five Days points out that the new limitations of the CNMC could stop part of these projects and leave out consumers with higher connection costs. The electricity companies are now preparing allegations before the Council of State, while the regulator defends that its proposal offers stability and predictability for six years, a rarity in a context of financial and energy volatility. An invisible, but transcendental decision. The figure of 6.58% will not say much to the average consumer, but a good part of Spain’s electrical future depends on it. It defines whether there will be enough investment to connect the new factories, electric vehicle chargers or data centers that support digitalization, and also how much each family will pay to keep that network operational. You won’t notice anything on your next bill, but this decision determines how much you’ll pay—and how reliable your grid will be—over the next five years. Between containing prices and … Read more

the architect of the chinese electrical empire

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On November 20th our Xataka NordVPN Awards 2025which you can follow from our website. In them we will reward, as always, the most important devices and technologies of this year. And of course, in its fourth edition, we will present the Xataka Leyenda award. This recognition, achieved by Pedro Duque in 2021, Margrethe Vestager in 2022 and Matt Mullenweg in 2023recognizes the journey and career of someone of great relevance in science and technology. Today we have the honor of announcing the fourth winner of this award: Stella Li, global executive vice president of BYDthe company that has transformed the automotive industry. Stella Li will join us during the Xataka NordVPN 2025 Awards gala in a few weeks (you can still get a ticket) and we will do an interview that you can see and read on Xataka. You can follow it live with us. Almost three decades of total transformation Li has been with BYD for almost thirty years. He joined when it was a battery manufacturer with two dozen employees that supplied Motorola. Today he directs operations in 88 countries of a company that is approaching a million workers and exceeds $100 billion in revenue. In 2024, BYD manufactured 4.27 million electric vehiclesmore than any other manufacturer in the world. At the beginning of the year she was appointed World Car Person of the Year 2025the first woman and the first Chinese to receive this recognition. His philosophy is direct: “Our common enemy is the internal combustion engine.” He does not see competitors in Tesla or Volkswagen, but rather allies against oil. A rare bird. The industry has been betting on specialization for years, but Li has promoted the opposite: BYD manufactures everything in-house, from screws to chips. When the 2021 semiconductor crisis paralyzed competitors, BYD accelerated. This integration allows BYD to sell the Seagull for 9,000 euros and a luxury Yangwang for 300,000 both models being profitable. With 110,000 engineers, the company registers 32 patents daily. Solid state batteries, your great future betare confirmed for 2030, with 10,000 engineers dedicated exclusively to its development. Execution speed The Brazil plant was announced in December and was already operational in March. The Spanish network has gone from zero to 65 dealers in a year and a half months. When Europe imposed 17% tariffs, BYD pivoted to plug-in hybrids within weeks and sales skyrocketed 892%. Pure speed. Li has not focused his strategy on exporting Chinese cars, but on something very different that explains his success: creating local ecosystems. Hiring in California, development of specific flex hybrids for Brazil, software adapted for each European market… One of its latest movements has been the announcement of 20,000 million euros in European investments and the creation of 10,000 jobs in Hungary. You still have time to get your tickets for the gala Xataka NordVPN Awards 2025 on November 20 in Madrid! Join us and discover the best technological products of the year in a free event full of gadgets, humor and surprises. Advice offered by the brand Despite his growing importance, Li does not have social networks. He gives interviews, but not many. Her public profile is inversely proportional to her impact: she has opened 230 stores in Europe in 12 months, she already has a presence in 88 countries and has multiplied the value of BYD by 20,000 since 2003. She herself was personally in charge of the openings of the first offices in Hong Kong, Rotterdam and Chicago. Three decades of institutional memory converted into the greatest competitive advantage. Stella Li has transformed the global automotive market without having to make media noisecombining strategic patience Zen and very high speed of execution. For all this journey she is the winner of the Xataka Leyenda 2025 award. In Xataka | Stella Li, vice president of BYD: “In five years we will be one of the three main manufacturers in the world, I am convinced” Featured image | Xataka

What are lightning bolts and how are they formed, the impressive electrical discharges that scare and fascinate in equal measure?

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The good news is that the chance of being struck by lightning this year is less than one in a million. Even better news is that 90% of people struck by lightning survive. Even so, it is always advisable to avoid risks when we are talking about atmospheric phenomena as violent as these. Lightning strikes cause both fear and fascination, a fascination that sometimes leads us to ask questions about the nature of these immense electrical columns. What is lightning Lightning is an electrical discharge (each lightning can generate several discharges), generally of very high power, that occur in clouds. These are meteorological phenomena that, although they have its origin in the atmospheresometimes they reach the surface of the Earth. We usually associate lightning with storms and cyclones, but these discharges can occur in other contexts, for example during volcanic eruptions, during fires of a certain intensity or when nuclear weapons are detonated. How lightning is formed Lightning usually occurs in stormy conditions and, the truth is that we do not fully know how. We know that under certain conditions, clouds can go accumulating electrical charges both positive and negative. In these cases, the air acts as an insulator between areas of positive or negative accumulation, as well as between these areas and the Earth. At a certain point, the accumulation of these charges exceeds a threshold that causes this insulating capacity of the air to give way. So all that accumulation of charges generates an electric current capable of traveling long distances (even several hundred kilometers). The discharge allows the electrical charge to balance, but the charges can accumulate again until the next lightning strike. What remains a mystery to us is the beginning of this process, how positive or negative charges accumulate in certain regions. The main hypothesis suggests that the origin of this accumulation is in tiny hail particles (also called graupel) that grow as they encounter supercold water droplets (in a liquid state but with temperatures below freezing). In thunderstorms, these icy particles would frequently collide, colliding with other icy particles. These collisions would cause the charges of the different particles to gain charge of one sign or another. Difference between lightning, thunder and lightning Electrical shocks are usually invisible to the human eye and they also do not generate noise, but this is not the case with lightning. Lightning generates not only a flash of intense light, but also a significant roar. We call the zigzag luminous path of lightning lightning. As it passes through the atmosphere, the electrical discharge causes the air to heat up to exceed temperatures of 27,000º Ceslius, a temperature higher than that observed on the surface of the Sun. This causes the air to become incandescent, generating lightning. Such rapid and intense heating of the air has another effect, making it “explode” outwards. This rapid movement of air is responsible for the second element that makes up lightning, sound or, in other words, the thunder. Light and sound move through the atmosphere at very different speeds. This is what makes us see lightning even seconds before its sound reaches our eardrums. This gap gives rise to an old trick to measure the distance at which the storm is from us. If we count the seconds of lag between light and sound and divide the result by three, we can estimate the distance in kilometers at which the lightning occurred. Types of lightning Cloud flashes and cloud-to-cloud Among conventional rays we can distinguish various types depending on the location of the points they join. The first of the groups that we can distinguish is that of the cloudy flashes. Most lightning strikes never reach the ground, in fact it is common for them not to even escape the cloud in which they occur. These rays are also often called intra-cloud rays. Within the category of lightning that never reaches the ground, there are some whose path partially escapes the cloud and even some that start in one cloud and reach another different cloud. Cloud-to-surface We distinguish these cloudy flashes and rays from those that do manage to reach the Earth’s surface. These types of discharges occur from the top down, at least when they happen naturally. The rays that join cloud and surface can be both negative and positive depending on where the respective negative and positive charges are located. Negative rays are the most common rays (they represent around 95% of impacts). In these rays, the clouds accumulate a negative charge and the Earth has a positive charge. When lightning opens the channel, the negative charge moves from the cloud to the ground, hence the name. The positive rays They are less frequent but at the same time more powerful. The reason is that these originate in higher areas of the cloud, so they must travel further. This in turn means that they accumulate more energy before discharging. Other unique events However, there is a different category that we call transient light events, or TLE (transient luminous events). These phenomena are much less frequent, more difficult to observe and, as a consequence, much more mysterious. How powerful is lightning? The strength of lightning can vary considerably depending on atmospheric conditions and the Earth’s surface. As explained According to the United States National Weather Service, a “typical” lightning strike can discharge about 30,000 amperes with 300 million volts. However, we pointed out before that a positive ray can transport much more energy. According to NOAA (National Oceanic and Atmospheric Administration), the organization on which the American meteorological service depends, these types of discharges can be an order of magnitude higher, discharging 300,000 amperes with 1,000 million volts. Many will wonder Why don’t we take advantage of this energy? and the answer is that, today, there are too many difficulties to make this technology a reality. First, we must keep in mind that lightning is a transitory phenomenon that can occur in different places: to obtain its energy we would have … Read more

Aerothermal energy is the heating of the future, but the electrical installation is stuck in the past

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“Winter is coming”, read the iconic phrase of the Stark family in Game of Thrones. There are less than two months until the official arrival of winter and, with it, the time to see how our energy bill trembles as much as we do. Search formulas to heat the house becomes prevalent in this final stretch of the year, especially when heating continues to be one of the main reasons why electricity consumption skyrockets. Every season new technological promises appear to maintain comfort without emptying your pocket, and aerothermal energy has become one of the most popular.But the key question arises: can all homes really benefit from it? The rise of aerothermal energy. This technology It works in a very simple way: Harnesses the energy already in the outside air to heat or cool the house and produce hot water. Instead of generating heat by burning gas or consuming large amounts of electricity, this system “extracts” it from the environment and multiplies it. In practice, this means that for every kilowatt of electricity it needs to operate, aerothermal energy can produce up to five of useful heat or cold. While a radiator or boiler converts energy into heat directly, aerothermal energy does something more intelligent: it extracts heat from the air and multiplies it. According to the architects consulted by Arquitectura y Diseño They calculate that, in a medium-sized home, this difference can translate into savings of up to 35% annually, as long as the house is well insulated and the climate is favorable. For the pocket, it translates into about 100 to 130 euros less on the annual bill. So aren’t all houses ready? Although it sounds like a perfect technology, architects warn that not all homes can take advantage of aerothermal energy on equal terms. In fact, there are multiple factors that reduce its effectiveness: the type of home, its insulation, the location and the specific energy needs. In Mediterranean climates, for example, where passive design allows thermal comfort to be achieved without active systems, “it does not make sense to use aerothermal energy as the main heating or cooling system.” In other words, installing aerothermal heating without previously evaluating the home can be like buying an electric car without having a plug at home. Experts in sustainable architecture insist that energy demand must first be reduced and housing optimized before betting on advanced technologies. The state of the electrical installations is another of the great brakes on the electrification of the residential park. The Observatory of Electrical Rehabilitation of Housing warns that 80% of the houses have technical deficiencies, and that only 22.4% were built after the 2002 Technical Regulation. This makes it clear that the majority of homes continue to depend on old networks, poorly prepared to assume new energy demands such as those required by aerothermal energy or solar self-consumption. The signs to know if your home is suitable. Before considering installing aerothermal, technicians recommend doing a prior evaluation. OK with the expertsthese are the main technical requirements: Have a ventilated outdoor space, free of obstacles, to place the outdoor unit. Have a modern electrical installation and sufficient contracted power. Check the thermal insulation and carpentry: without a good envelope, the efficiency of the system drops. Adapt the existing heating system (for example, replacing conventional radiators with underfloor heating). Carry out a climate feasibility study: in very cold or hot areas, you may need support from another system. In short, aerothermal energy is not installed, it is prepared. A well-insulated house with modern electrical installation can convert air into free energy; An old home, on the other hand, can make it an expense that is difficult to amortize. Furthermore, if it is found that the initial investment It can exceed 8,000 euros for an 80 m² apartment. What if it is combined with solar energy? Where aerothermal energy deploys its full potential it is when combined with photovoltaic solar energy. This synergy multiplies performance and reduces dependence on the electrical grid. The energy generated by the plates can power the heat pump, achieving an almost self-sufficient system with an emissions balance close to zero. Furthermore, it has already been applied in real projects such as Casa Gualba, designed by Slow Studiothis formula allows the production of up to 17 MWh per year thanks to the integration of tiles and photovoltaic panels on the roof. In short, aerothermal energy and solar energy form an efficient tandem, as long as the home is prepared for it. Efficiency, yes, but with preparation. Aerothermal energy is here to stay. It is a key piece on the path to decarbonized homes, especially now that the European Union banned at the beginning of the year subsidize gas boilers. But, like all technology, it only works well when the environment supports it. Investing in aerothermal energy without first checking the electrical installation, insulation or orientation of the home can translate into frustration rather than savings. For this reason, it is advisable to do a good check and thus the air can become our best ally against the cold. Image | FreePik and FreePik Xataka | Resolving one of the great debates in all kitchens: whether it consumes more to turn on the oven or the air fryer

Data centers do not want to depend on the conventional electrical grid. Solution: build your own plants

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AI data centers have sparked a new fever: the so-called “bring your own power.” The demand and consumption The pressure these plants impose is so enormous that they do not want to depend on external sources. The solution is theoretically simple, and we are already seeing how when a new data center is built, it is normal for some type of power plant to be built next to it. We are seeing it now. The data centers that OpenAI and Oracle are building in West Texas are accompanied by the creation of a natural gas-based power plant. Both xAI’s Colossus 1 and Colossus 2 in Memphis take advantage of gas turbines. And as they also indicate in The Wall Street Journalmore than a dozen Equinix data centers across the US are powered by stand-alone fuel cells. If the conventional electrical grid cannot be used, nothing happens: you create a power plant and that’s it. The US has an electrical problem. The technology giants would prefer to connect to the conventional grid, but bottlenecks in the supply chain, bureaucracy – permits, licenses – and the slowness in building the necessary transmission infrastructure prevent this. According to the ICV firmThe United States would need to add about 80 GW of new generation capacity per year to keep pace with AI, but right now less than 65 GW per year are being built. There is another direct consequence of this problem: the rise in the electricity bill. Data centers that look like cities. The needs and ambition of AI companies has made data centers become calculation and resource consumption monsters. One can only consume as much electricity as 10,000 stores in the Walmart electronics chain, WSJ estimates. Before 2020, data centers represented less than 2% of US energy consumption. By 2028 they are expected to represent up to 12%. A 1.5 GW data center, for example, would have consumption similar to that of the city of San Francisco, with about 800,000 inhabitants. China has a lot of advantage over the US in this. While the US deal with that lack of powerChina does not stop investing in new energy generation. According to data According to the National Energy Administration, the Asian country added 429 GW of new energy generation in 2024, while the US only added 50 GW. It is true that China has four times the population, but its centralized planning is helping to avoid problems that affect the US electrical grid. The white knight to the rescue. Faced with this shortage, natural gas has become the preferred resource for on-site energy generation. Although large turbines have long delivery times, smaller turbines or fuel cells that use natural gas are being used because of their rapid availability and installation. Renewables lose steam. Meanwhile, things are not promising for renewable energies (solar and wind, especially). There are about 214 GW of new generation theoretically in projectbut spending on such technologies could decline due to the potential loss of tax credits: the Trump administration criticizes that those clean energies do not provide a constant flow necessary for AI. The nuclear alternative. Faced with this apparent decline of nuclear energy, there is a growing interest in compact nuclear reactors (SMR), which allow us to provide the advantages of this type of center and a flexibility that can be very interesting for AI data centers. amazon, Google, Goal either Microsoft They are betting part of their future on nuclear powerbut that It doesn’t mean there aren’t challenges to overcome.. Image | Wolfgang Weiser In Xataka | World record in nuclear fusion: the German Wendelstein 7-X reactor has broken all records

Europe needs tungsten for its electrical future. A Swedish mining company knows where to find it: Ourense

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In the parish of Pentes, in the Ourense municipality of A Gudiña, the excavators have already begun to remove earth. There, on a slope where until recently only the mountain wind could be heard, the Swedish mining company Eurobattery Minerals AB has launched the work to extract tungsten – also known as tungsten –, a strategic metal for the European energy and technological transition. Galicia thus joins the small group of regions on the continent with active exploitation of this critical mineral. A strategic mine for Europe. The company, through its Galician subsidiary Tungsten San Juan, has launched its San Juan project while preparing its application for the second call for Strategic Projects under the European Regulation of Critical Raw Materials (CRMA), to open in January 2026. The first earthworks and the construction of a service warehouse are already visible in the area, as confirmed by the Vigo Lighthouse. When it is at full capacity, this will be the second active exploitation of tungsten in Spain, along with that of Barruecopardoin Salamanca. More in depth. The San Juan project will be an open pit mine with a goal that goes beyond local production: to provide European tungsten to the continent’s new industrial ecosystem. The company has begun improving infrastructure and constructing a pilot plant with gravimetric technology, while estimating reserves of 60,000 tons of ore with a grade of 1.3% WO₃. These are modest figures on a global scale, but significant for a Europe that seeks to reduce its dependence on Chinese imports of this critical metal. It has not been a short road. The procedures began in 2016 with geological studies, surveys and the construction of accesses, all under the supervision of the Xunta de Galicia. “Our goal is to produce tungsten responsibly and efficiently within Europe,” explains Agne Ahleniusgeneral director of Tungsten San Juan and former head of the Barruecopardo mine. “With this project, Galicia and Spain reinforce their role in the European supply chain of critical raw materials.” The metal that supports the energy transition. Few materials concentrate as much strategic value as tungsten. Its density, its resistance and its very high melting point make it a key resource for modern industry: from wind turbines to defense, including semiconductors and electric cars. But behind its technical brilliance there is a global conflict. China controls more than 80% of production and, in recent months, it has further limited its exports. The result: skyrocketing prices, uncertainty in the markets and a new reminder of how dependent Europe continues to be. To break this cycle, Brussels has launched the Critical Raw Materials Act (CRMA), a plan to guarantee access to critical minerals within European territory. According to the European Commissionthese initiatives not only seek economic stability: they also aim to reinforce the industrial autonomy of the continent and reduce its vulnerability to geopolitical tensions. Spain, a mining window. The start of the San Juan project is not an isolated event. It is part of a larger movement: the rediscovery of Spain’s mining potential. The country has projects of copper, tungsten, vanadium, graphite and cobalt, in addition to new deposits of rare earths in Estremadura and Gran Canaria. The European Union has set clear goals. It wants to stop depending on third countries for its supply of raw materials, and the new Critical Raw Materials Regulation (CRMA) mark the way: By 2030, at least 10% of critical minerals must be extracted within Europe, 40% processed on EU soil and 15% from recycling. Furthermore, no external country may concentrate more than 65% of the supply. On this map, Spain appears as a key piece: with Galicia, Castilla y León, Andalusia and Extremadura at the forefront, the country could become one of the gateways to the new European green reindustrialization. European autonomy is in Galicia. The roar of the excavators in A Gudiña not only marks the beginning of a new mine, but also the symbol of a change of era. Europe wants to leave decades of dependence behind and build a more sovereign and sustainable industry. From a Galician hillside, a small tungsten mine has become part of that strategy. What begins in Pentes may be, deep down, one more piece of the new energy and technological map of Europe. Image | Unsplash Xataka | The price of silver is exploding to levels not seen since 1980. The reason: we need too much

Voltage problems have returned to the Spanish electrical system and the big question is what have we been doing these last six months

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The ghost of big blackout has returned to the fray: the Spanish electrical system has voltage problems. Serious problems, indeed. So serious that Red Eléctrica has had to ask for permission to take action on the matter. It goes without saying, but uncertainty spread like wildfire. Six months after the great blackout, Spain is living a little déjà vu. Are there reasons to be alert? What has happened? Electrical Network just notified to the CNMC which, for a couple of weeks, has observed sudden variations in voltage in the peninsular system. As he explained, this could compromise the security of supply and urgent measures would need to be taken to solve it. That includes temporarily modifying various operating procedures to stabilize the system while underlying problems are found. What do these modifications consist of? The proposals go from allowing technical adjustments to be applied directly during daily programming to giving the operator more room to act quickly if it detects a risk of instability, even before the operating day begins. In addition, it adopts stricter control of the automatic instantaneous balance mechanism and tightens the reactive voltage control. In summary, what has been notified is an express adjustment of the country’s electrical operations to contain the ups and downs in voltage that have been recorded. And all of this, to be implemented in five days. The big question is “now?” Because as Javier Blas pointed out“for months, the Spanish electricity grid operator (and the government) have been putting off the country’s electrical problems” and now, suddenly, a whole series of urgent measures are required. Red Eléctrica’s response. Given the concern generated by the request, the operator had to leave in passing, clarifying that there has been “no talk of a risk of imminent or widespread blackout”, that the voltage variations “have not posed a supply risk because they have been within the admissible limits”. However, the truth is that no one is too calm. As Blas said“The urgent request adds up to an additional $1 billion cost for Spanish customers as the grid operator is operating the system in what it calls a “boosted mode” since April 29 (in effect, operating gas-fired power plants more intensely and reducing solar and wind power).” If under these conditions the entire series of measures that have been requested are needed, there is some underlying problem. Or, at least, that’s what it seems: that the symptoms of stress in the system are clear and it is not at all clear that a handful of temporary measures are the solution we need. Image | Anton Dmitriev In Xataka | Harvest wheat or kilowatts? The new account that many farmers in Spain make

Madrid plays 23.4 billion with data centers. The risk of losing them is in the electrical infrastructure

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Madrid has managed to position itself as The great HUB Digital of Southern Europe For the data centers industry, but the electrical infrastructure of the twentieth century cannot support the growth of the 21st century. Why is it important. The Community of Madrid leads Spain in data centers with 23.4 billion euros in investments planned until 2028. But 82% saturation This leadership puts this leadership against other European regions. In figures: Madrid concentrates 54.8% of the national capacity of data centers with 216 MW in operation. The forecasts point to 522 MW when the works under construction and up to 1.7 GW in 2030. The sector has grown 33% last year and will generate 35,000 jobs in six years. The threat. Ayuso is preparing allegations against what he considers A “over -regulation” of the Ministry of Ecological Transition, but the real problem is on the network. Electric distributors denied six out of ten access requests last year. Without immediate improvements, Spain would have already lost 60,000 million in investments, according to the employer’s calculations, Spain DC, collected by Digital economy. Between the lines. The Madrid paradox is evident: The region produces just 1,334 GWh … … but consume 27,487 GWh per year. It is an energy black hole that works because Spain exports electricity and technological ones sign long -term contracts. But that does not solve the saturation of the distribution network. What is happening. The Government He has put a Royal Decree until September 15 which will force data centers to report their environmental footprint, energy consumption and water use. Madrid considers that it can subtract competitiveness, but it is a minor problem compared to the lack of electrical capacity. Deepen. Spain DC claims an urgent modernization plan, and The electric ones ask the CNMC to raise the remuneration rate of 6.46% to 7.5% To invest in a network. The cost will be paid by consumers at the light bill, but without that investment Madrid will lose the train centers train against Frankfurt, Amsterdam or Paris. In Xataka | Emptied Spain has been filled with solar mills and panels, but waste energy for a simple reason: there are no cables Outstanding image | Community of Madrid

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