panel

Silver is completely out of control, so the solar panel industry has decided something: go independent

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Solar energy, promised as the cheapest and most abundant source of electricity in history, has hit a geological and financial roadblock of critical proportions. The photovoltaic industry is suffering what the Financial Times has baptized like a Silver Squeeze (silver strangulation), a suffocating pressure derived from the dizzying rise in the price of this metal. Manufacturers, who have been fighting for years against slim margins, are now “feeling the heat” of a raw material that has become unaffordable, forcing them into a frenetic technological race to eliminate it from their products. This is not a simple market rally. What we are witnessing is a “perfect storm” where real physical scarcity threatens to slow down the energy transition. According to Bloombergthe rise in silver has hit some solar panel manufacturers that were already burdened by losses after years of brutal competition. After five consecutive years of deficit, silver is no longer just a safe haven asset to become the bottleneck of the green economy. The figures are dizzying. According to the Financial Timesthe price of silver has risen 300% in the last year, breaking the psychological barrier of $100 and currently standing at $112 per ounce. This increase is fueled by three fires: geopolitical fear of possible US military intervention, the voracity of the industry and the massive entry of retail investors, for whom silver is “the poor man’s gold.” This speculative appetite has skyrocketed prices by 60% since the beginning of 2026 alone. The magnitude of the increase in prices is such that from investment portals such as Investing News have reported record prices of $93.77 in mid-January, but market reality has exceeded forecasts in just weeks. But there are geopolitical actors pulling the strings behind this scenario. China, the largest global refiner, has imposed strict controls to export by 2026-2027, shielding its strategic resources for its own renewable energy and Artificial Intelligence industry. Added to this is that India and Russia are aggressively buying physical silver, draining inventories in London and Asia and causing real shortages in Western markets. Financial drain and existential threat The impact on the cost structure of a solar panel has been devastating. According to data from BloombergNEFsilver has gone from representing 3.4% of the cost of a module in 2023, to 14% last year, to an unsustainable 29% today. Silver has dethroned polysilicon and become the most expensive component in manufacturing. For the giants of the sector, this is raining in the wet. Titans like JinkoSolar, Longi and Trina Solar They are posting quarterly losses consecutive in the midst of a “vicious price war.” Factories operate at just 50% of their capacity and, in many cases, sell modules below production cost. Jenny Chase analyst cited by Financial Timessummarizes the situation without hot towels: “It is very painful for solar module manufacturers, who are already having a terrible time and are expected to report losses by 2025.” The problem is that companies have their hands tied in passing on these costs. As explained in PV Magazinedue to excess capacity and weak demand, it is “almost impossible” to pass on the entire increase in the price of silver to the end customer. Although Chinese manufacturers have recently tried to raise prices between 1.4% and 3.8%, these increases are minuscule compared to the 180% or 300% increase in raw material prices. The long-term consequence is what experts call “demand destruction.” If prices remain at these levels, silver use in the PV industry could fall by 20% this year, not only due to efficiency, but because the industry simply cannot afford it. The great substitution Faced with financial asphyxiation, the industry has accelerated what they call “thrifting”, a race against time to replace silver with cheaper metals. The favorite candidate is copper. According to Investing Newscopper is trading 22,000% cheaper than silver and is much more abundant, making it the great hope for saving profit margins. Faced with suffocation, the industry has accelerated the thrifting (material savings) to replace silver with copper, which is 22,000% cheaper. The large Chinese manufacturers already they have made a move. Longi Green Energy will begin mass production of cells using base metals (such as copper and aluminum) in the second quarter of this year. Trina Solar is developing copper contacts to reduce its dependence, and Aiko Solar has already begun producing completely silver-free cells. The Chinese industry, which is more intensive in the use of silver than the European one, lead this forced transition. However, the change is not easy. As they warn in PV Magazine warns that not all solar technologies are equally suited: while heterojunction (HJT) and back contact (BC) cells facilitate the use of copper, the current dominant technology (TOPCon) requires high temperature processes that make copper vulnerable to oxidation. Here lies the greatest risk of this flight forward. Copper oxidizes and degrades faster than silver. Bloomberg alert about danger of launching copper panels on the market without sufficient longevity tests. Customers demand 20-year warranties; If new panels fail within 10 years due to copper corrosion, manufacturers could face massive liabilities that would put them out of business. As one precious metals expert points out: “Going too far too fast can be risky.” A future of scarcity and recycling The pressure on silver doesn’t just come from the sun. At this point we introduce in the equation Artificial Intelligence. The data centers necessary for AI consume enormous amounts of energy, which triggers demand for solar installations and, therefore, money. It is a vicious circle where technology devours physical resources. Furthermore, the electric vehicle (EV) enters like another big predator: An electric car consumes up to 50 grams of silver, almost twice as much as a combustion car. It is estimated that demand from the automotive sector could triple by 2030. In this context of shortages, some companies are taking desperate measures. He Financial Times reveals that Samsung Construction and Trading has skipped the middlemen and signed a two-year direct agreement with a mining company to secure its supply. … Read more

the luminous paradox of a vertical panel on the balcony

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Last month, Alejandro Diego Rosell – energy consultant, professor and analyst with more than a decade in the photovoltaic sector – discovered something that does not fit with what we all believe about solar energy: his balcony produced the highest generation day of the year and also a day of absolute zero. Same month, same installation, but opposite results. The paradox is not a flaw: it is exactly how a solar balcony works in a real city. And what his case reveals dismantles many of the myths of urban self-consumption. The solar balcony phenomenon. The explanation begins with a phrase that Diego repeats in the interview he gave us in Xataka: “The real performance depends more on the angle, shadow and geometry of the building than on the calendar month.” Its panels are installed almost vertically, an unusual orientation on roofs but very common in Spanish apartments. And this completely alters the classic pattern of solar production. Record day: 2.35 kWh on a cold, clear day in November. Zero day: November 15, with 0% apparent production. And why? It is precisely because of the combination of verticality and battery. Your installation now works with plug-and-play batteryand that introduces a little-known phenomenon: “The battery needs a minimum current to start charging. If the output is too low, it does not accept it and does not send anything to the microinverter either.” In other words, some energy is generated, but it is so little that the battery does not activate and the system does not account for it. That minimum production is left out of the records, which causes some days to appear as “zero” even though they really are not. Position matters. Alejandro Diego’s experience uncovers several lessons that almost no one knows before installing one of these kits. On the one hand, a vertical panel performs better in winter. “In winter the sun is so low that it looks at you from the other side of the street,” says the energy analyst. And it makes physical sense because the sun, being low, affects almost perfectly on a vertical panel and the cold makes for better performance. In fact, this idea is not anecdotal, verticality is beginning to be adopted even in professional installations, as is the case of the company Over Easy Solar in the Valencian Community. On the other hand, shadows are the great invisible enemy. “Shadows travel,” insists the energy consultant. A railing that barely touches the glass panel in June can ruin 20% of the day in January. A neighbor’s awning can cut entire hours of production. And tall buildings create cast shadows that move like clockwork. The batteries and the fine print. Here we come to the kit question: “It’s not plug and play.” The Master in Renewable Energies (MERME) professor details that Plug-and-play domestic batteries help—they shift consumption, allow prolonged injection, improve peak utilization—but they also bring surprises: very low production simply does not enter the system, there are efficiency losses in the charge-discharge cycle, and they weigh more than people imagine. In a market where Ikea, EcoFlow, Zendure or even electric ones are launching batteries “for everyone”, this clarification matters. Urban photovoltaics are unpredictable. If there is one thing that Diego is clear about after almost a year measuring every watt that enters his balcony, it is that photovoltaics in the city do not follow the rules that one imagines from the outside. In its installation, the data changes abruptly depending on the angle of the sun, the presence of shadows or even the type of cloud cover. And there is no need to go into theories: you see it in your daily life. In December, For examplehas reached more than 2 kWh in a single day. It seems counterintuitive—especially considering that December is one of the months with the fewest hours of daylight—but the explanation is simple: the low sun hits a vertical panel almost head-on and the cold improves the electrical performance of the module and the microinverter. However, in April – with longer days and clear skies – there were days that did not even reach 1.5 kWh. “The angle of the sun changes everything,” he explains. In spring the sun begins to rise, hits the panel from above and the verticality penalizes more than intuition suggests. The clouds also influence. This opens another chapter: even small passing clouds can reduce production in a matter of seconds, because they block direct light—the one that really triggers the generation—and leave only the diffuse light, much less usable in such an angle-dependent installation. When the sky is completely covered, the situation is even clearer: production usually sinks to 5–10% of the daily potential, figures that the consultant has seen repeated over and over again. These same extreme oscillations are common in the thousands of solar balconies installed in Germany: very good days, very bad days and a performance that depends more on urban physics – shadows, orientation, tall buildings that cut off the sun at different times – than on the calendar or the general weather. The conclusion, in Diego’s own words, is that a solar balcony is educational, useful and surprisingly efficient for its size, but not magical. It produces, yes, but it produces according to the physical reality of the building, not according to the mental idea that many have before installing one. The real barriers to installing one. In Spain there is a particular ecosystem: plug-in kits are limited by law to 800W, neighborhood communities may require permission if they are on a façade or railing and the regulations require electrical protections and, sometimes, a bidirectional meter. Alejandro Diego had no problems with his community—”from the street you can hardly see it”—but he admits that in other buildings it can be a bottleneck. On the other hand, in countries like Germany, the regulation explicitly protects the right to install them. The result has been more than 1.5 million of kits operating and half a million installed in just one … Read more

In the Tiktok era, our laptops are still horizontal. Lenovo’s idea: a rotating panel

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There are countless vertical content that we see daily on horizontal screens. This text, without going any further. Also a Tiktok video They share us by WhatsApp, a short, an article, a book or a PDF. The programming too It is very grateful for a vertical screen. The problem is that if we use a laptop, we have no option. The screen is horizontal yes or yes, and it does not seem viable or makes a lot of sense to make a vertical laptop. Well, Lenovo has had an idea of ​​the most peculiar: a laptop with a screen that rotates. This is the Lenovo Thinkbook Vetiflex Concept in vertical mode | Image: Xataka Lenovo Thinkbook Veriflex Concept. That is the name that receives this peculiar device that the company has taught during its conference in IFA and that from Xataka we have had the opportunity to try. The device, at first glance, is a conventional laptop, but if we throw up the upper right corner we can pivot the 90 degree screen and put it vertically. The Windows interface, of course, adapts to the new format as it does on tablets. How it works. Between the rotating screen and the rear support there is a hinge. Unlike other devices, such as the roller laptop (which we have also been able to throw the glove) or the TV Samsung the serothe mechanism is manual. It does not turn automatically. To my surprise, the turn is very, very fluid and soft. Another thing is that it transmits rigidity, which does not do so. To turn the screen you have to pull this corner | Image: Xataka On the other hand, the hinge does not support several positions (for the cover photo I had to make some juggling). The screen can only be put in vertical or horizontal, not in intermediate positions. Something that, everything is said, has all the meaning of the world because why we would like to have an inclined panel 45 degrees. It shows that it is a concept. The hinge is perfectly exposed to the outside. It is not seen with the naked eye, but the mechanism can be seen if we look from above or on the lid when we pivot the screen. That is something that, if you want to launch it commercially, would have to change. It would be enough to accumulate some dust inside to cause a failure. For that same reason, folding mobiles have a kind of cap protecting the hinge. This is how the hinge area is seen from behind | Image: Xataka The thickness of the screen is similar to that of a conventional laptop | Image: Xataka Another aspect that seemed curious is that the screen cannot be pivoted with one hand. By pulling the upper right corner, we have, in turn, to hold the laptop chassis with the other hand so that it does not move. Surely here you have to make concessions in one or another address: or a resistant hinge that endures long -term or a lighter hinge that allows the operation with one hand. The idea is very cool. The Lenovo Thinkbook Vrtiflex Concept has a 14 -inch panel, weighs 1.39 kilos and I must recognize that it feels surprisingly natural. The feeling has been like the first time I opened a folding mobile (curiously, Motorola Razr It’s now … Six years, my God, how time passes). At first it is strange, but when you have done it a couple of times and you have lost the “fear of breaking”, it is natural. As much as changing any vertical to vertical tablet. Moreover, I find it more natural than folding a convertible, without going any further. Horizontal, the laptop passes through a normal and current laptop | Image: Xataka Personally, I can imagine using such a laptop. For productivity, I think the horizontal format serves me better, but if I am working on a topic and I have to read documentation, or it is good for me to have more text on the screen or, simply, the new chapter of One Piece has just left and I want to read it in conditions without changing the device, it sounds good to turn to turn the portable screen. Will you see the light one day? From Lenovo they have insisted that it is a concept and, as such, leaves several unknowns on the table. The first is its durability. From the firm they have not confirmed what expectations have in the hinge because, after all, it is a device fresh out of a laboratory. The second is if it will be launched at some point. Folded, again, it’s like any other laptop | Image: Xataka Lenovo invests 2,000 million dollars annually in R&D. Some of the products you develop never see the light. Others are prototypes or concepts that feel the bases, which are the seed, of products that are then launched. And I know well because I had in my hands the first folding portable concept quite a while before Light saw in the form of a final product. We do not know if we will see this implementation in a product at some point, but it must be said that it could make sense in certain cases of use. Be that as it may, I have no doubt that Lenovo has a job ahead, starting to hide the hinge better and remove such a delicate mechanism from dust and/or the inclement ones to which a laptop can be subjected when we carry it in the backpack. Images | Xataka In Xataka | Lenovo is clear about its strategy to connect its products: obsession with the AI ​​ecosystem

For the price it has, few teles interest me as much as Xiaomi’s. It comes with Fire TV, 75 -inch qled panel and Alexa

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A few years ago I bought a Xiaomi TV. Although I do not have to change it, there is another of the same brand that attracts my attention: the Xiaomi TV F Pro in its 75 -inch configuration. It has a good size, it is quite complete and its price is not very high. The brand’s official store has this model by 799 euros instead of the official price that reaches 999 euros. Xiaomi TV F Pro (QLED, 75 inches) * Some price may have changed from the last review A TV with Fire TV, Alexa and FilmMaker mode The particularity of the Xiaomi TV F Pro It is like a kind of revision of the Xiaomi TV A Pro, but with an important addition: instead of Google TV, it comes with the operating system Fire TVthat of the Amazon devices that we saw previously on the smart TV Xiaomi TV F2. The truth is that in addition to this peculiarity, we talk about a quite complete television. Mount one QLED screen of, in this case, 75 inches offered by a 4K UHD resolution and a 60 Hz soda rate. It also includes the Filmmaker mode And it is compatible with both HDR10+ as with HLG. On the other hand, the Xiaomi TV F Pro integrates two speakers that offer a total of 20W. These speakers are compatible with Dolby Audio, DTS-X and DTS-Virtual. In addition, the television comes with other matches equally interesting: AirPlayMiracast, the voice assistant Alexaincludes several HDMI, USB and Bluetooth ports, among other connectivity options. You may also interest these sound bars for Xiaomi TV LG S40T – Smart Sound Bar, 300W, 2.1 channels, Dolby Digital and DTS surround sound, wide connectivity, HDMI, Bluetooth, USB, optical input, black * Some price may have changed from the last review SAMSUNG SOUND BAR HW -B650D – DOLBY ATMOS, INTEGRATED SIDE SHEETS, SOUND WITH AI * Some price may have changed from the last review Some of the links of this article are affiliated and can report a benefit to Xataka. In case of non -availability, offers may vary. Images | Xiaomi In Xataka | Best televisions in quality price. Which to buy and seven recommended 4K 4K In Xataka | The best Xiaomi mobile price: purchase and comparative guide

Its solar panel in tandem already exceeds the theoretical limit of silicon

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The efficiency of solar panels always andStá in object of studyand the only country capable of developing new advances is China. In fact, the company Longi has achieved have even a certificate of the National Renewable Energy Laboratory (NREL) of the United States. Short. The Chinese giant of the solar modules He has achieved A new record in solar energy conversion, reaching 34.85% efficiency in a pervskita solar cell in two terminal tandem. In this way, Longi has managed to overcome The previous 34.6% record that Longi herself held two years ago. A key technical advance. To understand the feat, it is important to know the tandem design. This structure combines an upper cape of Perovskita and a lower crystalline silicon, allowing to capture different ranges of the solar spectrum. Through a technique called bilayer interface passive, two layers are introduced that improve the passage of electricity between both active layers. On the one hand, lithium fluoride (LIF) acts as a barrier against load losses. On the other, the ethylendiamium diyoduro (EDAI) fills the nanometric scale holes, ensuring a more efficient load extraction. It’s not just about materials. The Chinese company has also redesigned the structure of the crystalline silicon, making the frontal surface more rough to facilitate the adhesion of the Perovskita and maintaining a standard texture in the rear to optimize the capture of infrared light. This texturing improves the absorption of light and, therefore, the efficiency of the panel. Achievement is not less. Apart from overcoming its own record, the Chinese company has overcome The so-called Shockley-Queisser limit. In other words, it has managed to exceed the maximum efficiency limit marked by 33.7% for a single union. However, tandem cells, which combine different materials such as Perovskita and silicon, can overcome this limit by taking advantage of a broader range of the solar spectrum from the theoretical aspect. For example, research has shown that tandem cells can achieve higher efficiencies 40%and theoretically, some configurations could reach up to 60% . Institutional support. Thanks to the participation of the universities project such as Suzhou and Hong Kong (HKPU), together with the Huaneng Clean Energy Research Institute, They have allowed A Longi perfects its silicon hetero -union technology and optimizing manufacturing processes, bringing Tandem technology to a more commercializable level. The next challenge. Longi has shown that the solar efficiency roof remains a mobile objective. However, he will now have this laboratory technology to the mass market. The durability of tandem cells, production costs and industrial scalability They will be key factors To determine if this record becomes a commercial standard or another technical advance without immediate practical application. Image | Pixabay Xataka | New record of efficiency of a solar panel thanks to the Perovskita. The “miraculous material” already exceeds the theoretical limit of conventional panels

A QD-OED TV that the witness of the best Sony OLED panel collects

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The novel technology RGB LED From Sony was not the only thing we could discover recently at the European headquarters of the firm in Weybridge. And it is that the reason for our visit was rather knowing Your new TV line for this 2025which we knew very little or nothing. This year three new Smart TVS arrive that complete the range that the firm presented in 2024: Bravia 8 II, Bravia 5 and Bravia 3. In this article we have wanted to offer you Our first contact about Bravia 8 IIsince we had the occasion to mess with her more carefully and ended up looking like one of the most interesting models, especially for the return of the panels QD-OED From Samsung to the most up -to -date TV line of Sony. Sony Bravia 8 II, Technical Card Sony Bravia 8 II panel 4K UHD, QD-OED, 120 Hz HDR Dolby Vision, HDR10, HLG Sizes 55 and 65 inches Processor Cognitive Processor XR Operating system Google TV sound Voice Zoom 3, Acoustic Surface Audio+, Dolby Atmos, Imax Enhanced, DTS: X Main characteristics Triluminos Max, XR contrast Booster 25, XR Clear Image, XR OLED MOTION, ENVIRY OPTIMIZATION PRO 6, GAME MENU 2, PS REMOTE PLAY ANDEco Dashboard 2 price To be confirmed More shine and back to the QD-OED panel to give cane this 2025 When Sony launched its exceptional in 2024 Bravia 9his strategy left us somewhat bewildered. The firm launched a panel with MINILED TECHNOLOGY after an outstanding A95L With QD-OED panel. The change of sight now makes more sense We know that the company intends to focus on the near future on RGB LED technology, its proposal to improve the minned through a backlit matrix capable of reproducing the three primary colors (red, blue and green). New Sony televisions for 2025, with Bravia 8 II to the head However, it seemed rare for Sony to abandon QD-OED technology, even more so knowing the exceptional 2022 and 2023 models that they said to become our favorite OLED models of their respective years. Recently they implied that this was not so, but that the firm has opted for A two -year launch to complete its entire Bravia range. Although by the name we can assume that Bravia 8 II is the successor of the previous Bravia 8 of 2024, the truth is that both Sony’s documentation, and our experience with the TV, made it clear that This model comes to the Sony A95L of 2023both for benefits and for the type of panel. Sony takes chest from its image algorithms with its XR processor and calibrated engineering Brief review: This Sony Bravia 8 II has a state-of-the-art QD-OED panel of Samsung that, according to the documentation provided by Sony already lack of taste it in our most exhaustive analysis, offers A maximum peak brightness level that exceeds the Sony A95L by 25%. Despite being another panel technology, Sony also compares it with Bravia 8, this time with a maximum peak brightness difference that reaches 50%. During our tests at Sony offices We were able to test it in front of Sony A95L and also next to the HX3110 reference monitor. As we could see at that time, the calibration against A95L is very similar (already outstanding in the 2023 model), although we could clearly identify that improvement in the delivery of brightness, highlighting even more that difference in certain scenes. The content we had by hand to try the TV were films in Bluray UHD as’The reborn‘,’Jumanji: next level‘And other tapes. Although it is still from the experience that a reference monitor can give us in terms of image quality, Sony takes chest from its image algorithms and calibrated engineering Offering an image with this Bravia 8 II that, in the absence of spending more time with him, gives us clues of the great work that this house has done to move the experience of that reference monitor to the home. The differences are also palpable against the high -end units of other manufacturers that Sony placed in the room next to the Bravia 8 II, especially in color reproduction through the different ‘standard’, ‘cinema’ and ‘and’ image modes.FilmMaker‘. While we did not have the opportunity to get in the room with televisions from the rest of the manufacturers, Our first impressions with Bravia 8 II give us a very good flavor from Boca in the face of the experience obtained over the last months with the rest of the televisions. Although as we have made clear before, this model is still examined in more detail in our in -depth analysis. From left to right: Sony A95L, Sony HX3110 and Sony Bravia 8 II. The image does not do justice to the real experience, but at this time we perceive a better reproduction of the color that can be seen in the tone of the skin and more shine Here the secret is again its XR processorresponsible for optimizing the contrast in the image, of reproducing the colors so that they feel alive but without reaching the feeling of being ‘artificial’, offering images that eliminate the noise without softening the scenes too much and obtain the maximum possible detail of each frame both in the regions with more shadow and in the brightest. Therefore, the processor, in addition to the calibration, are the main reasons why, although Sony mounts the same Samsung panel, there is a reasonable difference. Both for brightness, as for colorimetry and capacity of its processor, the Sony Bravia 8 II leaves us good feelings Colorimetry ends up highlighting for its way of offering ‘living’ images without being artificial or supersaturated, as we have mentioned. In the test in front of the A95L that improvement is already noticeablealthough in truth, the difference between the A95K and the A95L was more palpable and obvious at first glance. Subsequent brave connections 8 II Another outstanding television feature is its construction, offering an elegant and fine design, with only 34 … Read more

All solar panel technologies that exist and which are more efficient, in a graph that goes 1975 until today

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The fastest energy transition in history is not the industrial revolution, as many think, but the one that is happening now With renewable energies. Renewables are being installed at a rate five times greater than all other combined energy sources. And although the great habilitator is the worldwide commitment to zero net emissions, it is the brutal evolution of solar panels that has allowed to reach this point. Photovoltaic panels have been so much that solar energy Start leaving wind energytraditionally more efficient. Throughout the last decades, solar cells have experienced a radical transformation, driven both by advances in material engineering and in innovations in manufacturing techniques; mainly from the Chinese industry, although Japan is trying to lead The next generation. The National Renewable Energies Laboratory (NREL) has Published a graph that illustrates at a glance How each photovoltaic technology has advanced since the 70s and which cells are more efficient today. Traditional cells: crystalline silicon Crystalline silicon cells The crystalline solar cells of silicon (blue in the graph) have dominating the market for several decades. The polyristaline silicon (the one used in solar panels with bluish crystals) is cheaper, but monochronic silicon (with black crystals) is the current standard of the industry thanks to continuous improvements in purification and production processes, which have approached their efficiency to an ability to convert 27.6% of sunlight into energy. Thin film technologies (green in the graph) emerged as an alternative to the crystalline silicon for facilities that require greater flexibility, lower weight or a large -scale manufacturing. The most efficient thin film cells are currently those of copper, Indian, Gallic and Selenium (CIGS) with an efficiency of 23.6%, closely followed by those of cadmium teluro (CDTE). The emerging: organic and perovskitas Emerging technologies cells Red in the graph, they are the photovoltaic cells that have tried to remove the throne from the silicon. Organic cells and coloring sensitized cells (DSSC) use organic compounds to absorb light. Its efficiency is modest (around 19%), but they have the advantage of their low cost and the possibility of integrating them into flexible devices and buildings with varied colors. One of the most revolutionary innovations in recent years has been the development of Perovskita cells (red with yellow filling in the graph). Thanks to its crystalline structure inspired by the mineral of the same name, these cells have been achieving exponential increases in efficiency in a short time, even if they were invented in Japan in the 80s. Perovskita cells are already as efficient as silicon, with an efficiency of 27%, but they have the problem of degrading much earlier. The tandem, the best of both worlds Tandem two materials cells The photovoltaic cells that make up silicon and perovskita in tandem are the most promising for generalized use today. The secret of combining both materials is that the upper perovskita layer absorbs high -energy wavelengths and the lower silicon layer captures the rest of the spectrum. With an efficiency of 36.1%, Tandem cells (brown in the graph) have left behind the theoretical limit of traditional silicon cells (33.7%). Although in the laboratories we still try to look for alternatives to the silicon, which is a more expensive material and with a supply chain controlled by China. All photovoltaic cells and their evolution By the latter, triple or more layers (multijunction) unions are the cells that have reached the greatest efficiencies in laboratory conditions: up to 47.6%. Its cost is high and its production is complex, but these cells are useful in solar concentrators, where maximum performance is sought. Images | NREL

The TM7 has a gigantic 10 -inch panel and is quieter than ever

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The first Thermomix was born in the 60s and, since then, there has been no fixed renewal cycle. The latest version was market in 2019, under the name of Themomix TM6. This TM denomination has been living since 1980, and returns to the market six years after the launch of the TM6. Thermomix has presented the TM7, an important evolution with respect to the previous model that lands (how not) with a huge 10 -inch touch screen, a new design and the promise of being quieter than ever. Thermomix TM7 Technical Card Themomix TM7 DIMENSIONS 33.6 x 25.3 x 40.5 cm WEIGHT 8.6 kg SCREEN 10 -inch tactile Cooking modes Without lid, brown, steamed, crushing, cooking eggs, boothing, thick, rice cook and sugar points ABILITY 2.2 liters in the glass 6.8 liters in total (including varoma) Accessories included Central Module TM7, stainless steel glass with thermal insulation, cestillo, varoma, butterfly, spatula, blades and three free months of subscription to the Cookidoo platform. PRICE 1,549 euros THE THERMOMIX OF 2025 If we had to describe how every 2025 technological product aspires to be the answer is clear: You must have a huge screen. This is with this TM7, which lands with a touch screen of no less than 10 inches. Almost three inches more with respect to its predecessor. This tablet is the cooking center for this Thermomix. It allows us to search for recipes, schedule the cooking, and manage absolutely all aspects of our kitchen apparatus. All recipes are managed from Cookidoo, Thermomix’s own platform with more than 100,000 recipes. During the three months after the purchase we can enjoy it for free. After this period, the price is 60 euros a year. One of the main novelties is the renewed digital simulationthrough which we are shown step by step how we should cook certain recipes. Beyond screens, this Thermomix has a stainless steel glass with thermal insulation. This allows us to manipulate the glass without burning, even if the interior is hot. The main novelty according to the company is in silence when cooking. Promises to be much more discreet than the previous one. Regarding accessories, it still has a 2.2 -liter glass, increasing this capacity to 6.8 liters If we use the varoma accessory. For the new ones in the Thermomix world, Varoma is an accessory container that allows steamed. It is quite large, and allows to increase the capacity of our device. This new model allows cooking without a lid, so you can make recipes without rotation of the blades. This is especially useful for recipes in which it is necessary to incorporate ingredients without interrupting cooking. Price and availability of the Themomix TM7 The new Themomix TM7 can already be reserved at a price of 1,549 euros. Deliveries will begin from April, by order order. You can buy it on the official website of VORWEKthat already accepts requests. Image | Xataka In Xataka | The pot with which I have started eating more vegetables because it no longer gives me so much laziness to cook them

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