In Short : ACME Solar has signed a 25-year power purchase agreement with NHPC for a 250 MW firm and dispatchable renewable energy project. The agreement ensures reliable round-the-clock clean power by combining renewable sources with storage solutions, supporting grid stability, enhancing renewable integration, and advancing India’s transition toward a low-carbon and resilient power system.

In Detail : ACME Solar’s signing of a 25-year power purchase agreement with NHPC for a 250 MW firm and dispatchable renewable energy project represents a significant development in India’s clean energy sector. The long-term nature of the agreement highlights growing confidence in hybrid renewable models that can deliver consistent and reliable power.

Firm and dispatchable renewable energy projects are designed to overcome the intermittency challenges associated with solar and wind generation. By integrating multiple renewable sources along with energy storage systems, FDRE projects ensure continuous power supply that closely matches conventional baseload generation profiles.

The partnership between ACME Solar and NHPC reflects an important shift in India’s renewable energy strategy. Rather than focusing solely on installed capacity, the emphasis is increasingly on reliability, availability, and grid integration. This approach supports the evolving needs of utilities and industrial consumers that require dependable power.

Energy storage plays a critical role in the success of FDRE projects. Battery storage systems or other forms of storage allow excess renewable energy to be stored during periods of high generation and released during peak demand. This improves grid stability and reduces dependence on fossil fuel-based peaking plants.

The 25-year duration of the power purchase agreement provides long-term revenue visibility for ACME Solar, enhancing the financial viability of the project. Such long-term contracts help attract investment, reduce financing costs, and support large-scale deployment of advanced renewable technologies.

For NHPC, the agreement strengthens its clean energy portfolio and aligns with its broader diversification strategy beyond hydropower. By procuring firm renewable power, NHPC can offer more reliable green electricity to its customers while supporting national renewable energy targets.

From a system perspective, FDRE projects contribute to better grid planning and operations. Dispatchable renewable power can support load balancing, reduce transmission congestion, and enhance the integration of variable renewable energy across regional and national grids.

The project also reflects India’s evolving regulatory and market framework for renewable energy. Policy support for hybrid and storage-based projects encourages innovation and accelerates the transition from capacity-driven targets to performance-driven energy solutions.

Overall, ACME Solar’s 250 MW FDRE project under a long-term agreement with NHPC represents a key milestone in India’s clean energy journey. It demonstrates how renewable energy, when combined with storage and smart planning, can deliver reliable, scalable, and sustainable power for the future.

Solar power in India has moved decisively from the margins to the mainstream of the country’s energy planning. With capacity targets rising and decarbonisation timelines tightening, the discussion is no […]

The post Manufacturing for Scale, Reliability, and the Next Phase of India’s Solar Growth appeared first on SolarQuarter.

In Short : Vietnam’s Vingroup has announced a USD 3 billion investment in Telangana to develop large-scale projects across smart cities, electric mobility, renewable energy, tourism, healthcare, and education. Spread over 2,500 hectares, the initiative includes India’s first electric taxi fleet, a 1,080-hectare smart city, and a 500 MW solar power project.

In Detail : Vietnamese conglomerate Vingroup has signed a Memorandum of Understanding with the Government of Telangana to invest USD 3 billion in developing an integrated multi-sector ecosystem across the state. The projects will cover smart urban development, electric mobility, renewable energy, tourism, healthcare, education, and strategic infrastructure, marking one of the largest foreign investment commitments in Telangana.

The investment will be spread over nearly 2,500 hectares and is expected to significantly strengthen Telangana’s urban infrastructure, clean energy capacity, employment opportunities, and global investment positioning. The partnership reflects Vingroup’s broader global expansion strategy and reinforces its growing presence in the Indian market.

A key component of the initiative is the launch of India’s first large-scale electric taxi fleet through GSM, Vingroup’s mobility arm. The fleet will use VinFast electric vehicles, supporting cleaner urban transport, reducing carbon emissions, and contributing to Telangana’s electric mobility ambitions.

Vingroup is also evaluating the establishment of electric vehicle manufacturing and assembly facilities in the state. This move would further integrate Telangana into India’s EV supply chain and strengthen the state’s position as a hub for electric mobility and advanced manufacturing.

Under its real estate arm, Vingroup plans to develop a Vinhomes Smart City over 1,080 hectares, designed to house nearly 2,00,000 residents. The project is expected to generate around 10,000 jobs and will include smart infrastructure, digital services, sustainable urban design, green spaces, and modern mobility solutions.

In addition to residential development, around 70 hectares will be dedicated to social infrastructure, including Vinschool K–12 campuses, Vinmec international hospitals, and a V-Green electric vehicle charging network. These facilities aim to enhance access to high-quality education, healthcare, and EV support services.

The tourism segment of the investment includes a 350-hectare integrated entertainment destination under the VinWonders brand. The project will feature a large theme park, a modern zoo, and a safari experience, positioning Telangana as a major tourism and leisure hub.

On the renewable energy front, Vingroup’s green energy arm VinEnergo will develop a 500 MW solar power plant across 500 hectares. The project will supply clean energy to residential zones, industrial areas, and EV infrastructure, directly supporting Telangana’s renewable energy and climate goals.

The Telangana government has assured full support for the projects through land allocation, fast-track approvals, and policy incentives. Chief Minister A. Revanth Reddy described the investment as a major endorsement of the state’s “Telangana Rising” vision, while Vingroup stated that Telangana offers strong potential aligned with its expertise in smart cities and electric mobility.

Like EVs, solar panels are sold with warranties – but what happens when the warranty runs out? A Swiss university study of solar installations from the 1980s and ’90s found many still generating most of their original power.

On today’s icy cold episode of Quick Charge, the only thing colder than the air outside most Americans’ homes is the demand for Tesla Cybertrucks – so we’ve got some EV-focused tips on making it through the cold while Elon begins shipping CTs overseas.

Wuxi DK Electronic Materials is pursuing two patent infringement cases against domestic competitors, seeking injunctions, equipment destruction, and combined damages of CNY 400 million ($57.5 million).

Wuxi DK Electronic Materials has filed two patent infringement lawsuits with the Jiangsu High People’s Court against Jiangsu Riyu Photovoltaic New Materials and Suzhou Jinyin New Materials Technology , seeking CNY 200 million in damages and related legal costs in each case.

The company said both filings have been formally accepted and registered by the court, although hearing dates have not yet been scheduled.

The lawsuits concern two Chinese invention patents, ZL201180032359.1 and ZL201180032701.8, covering thick-film conductive paste formulations for semiconductor devices, including solar cells. DKEM said the patents are held by its subsidiary Solamet Electronic Materials and relate to lead-tellurium-lithium and oxide-based paste technologies.

DKEM is seeking injunctions to halt the manufacture, sale, and offering for sale of the allegedly infringing pastes. The company is also requesting the destruction of dedicated production equipment and molds, and compensation for economic losses, enforcement costs, and related expenses.

The patents trace back to the intellectual property portfolio of DuPont’s former Solamet photovoltaic paste business, acquired by another entity in 2021 for $190 million. DKEM later consolidated control of the Solamet assets and associated intellectual property.

Suzhou Jinyin is described in Chinese financial reporting as a leading supplier of front-side silver paste for solar cells, ranking third globally by market share. Founded in 2011, it was later acquired by listed electronics firm Suzhou Good-Ark Electronics. Jiangsu Riyu is a fast-growing paste supplier that filed a Hong Kong listing application in 2025, with plans to expand into n-type and back-contact paste products.

This follows earlier high-value patent actions by DKEM. In 2025, its subsidiary filed a suit against Zhejiang Guangda Electronic Technology seeking similar remedies. A Solamet-linked entity also pursued related claims against Changzhou Juhe New Materials in 2021, with domestic and overseas disputes reportedly settled in August 2022.

Separately, DKEM flagged earnings pressure, forecasting a net loss of CNY 200 million to CNY 300 million for 2025, primarily linked to non-operating factors, according to Chinese financial media.

The Finnish start-up says its sand battery technology is scalable from 20 to 500 MWh with charging power from 1 to 20 MW, depending on industrial needs.

From ESS News

Finnish cleantech startup TheStorage says that its thermal storage technology could reduce industrial energy costs by up to 70% and cut carbon emissions by as much as 90%. The system converts renewable electricity into heat, stores it in sand, and delivers it on-demand for industrial heating.

The concept emerged in Finland in 2023, with engineering work beginning in 2024. In January 2026, TheStorage installed its first industrial-scale pilot at a brewery, putting the technology to the test in a real-world setting. There, it produces fossil-free steam for the brewery’s production lines.

“Producing steam without fossil fuels is a major step toward carbon-neutral production,” says Vesa Peltola, Production Director of the brewery.

TheStorage’s technology captures electricity when it is abundant and inexpensive, converts it into high-temperature heat, and stores it in sand. This stored heat can later be used in industrial processes independently of real-time electricity availability.

To continue reading, please visit our ESS News website.

Scientists have grown organic romaine lettuce under 13 different types of PV modules, in an unusual hot Canadian summer. Their analysis showed lettuce yields increased by over 400% compared to unshaded control plants.

A research group from Canada’s Western University has investigated the performance of organic romaine lettuce, a heat-sensitive crop, under a broad range of agrivoltaic conditions. The test was conducted in London, Ontario, in the summer of 2025, during which 18 days had temperatures over 30 C.

“Our study explores how agrivoltaic systems can be tailored to optimize crop growth, especially under extreme heat conditions, while contributing to sustainable energy generation,” corresponding researcher Uzair Jamil told pv magazine.

“This becomes especially relevant in the context of climate change, where we are experiencing temperature extremes across the world,” Jamil added. “We examined the performance of organic romaine lettuce under thirteen different agrivoltaic configurations – ranging from crystalline silicon PV to thin-film-colored modules (red, blue, green) – in outdoor, high-temperature stress conditions.”

More specifically, the experiment included c-Si modules with 8%, 44% and 69% transparency rate; blue c-Si modules with transparency of 60%, 70%, and 80%; green c-Si modules with transparency of 60%, 70%, and 80%; and red c-Si modules with transparency of of 40%, 50%, 70%, and 80%.

All agrivoltaics installations had a leading-edge height of 2.0 m and a trailing-edge height of 2.8 m, and the modules were oriented southwards at 34◦. Pots with organic romaine lettuce were placed under all configurations, along with three pots fully exposed to ambient sunlight without shading, used as controls.

In addition to measurements against the control, the scientific group has compared the results to the national average per-pot yield for 2022, which included less high-temperature days and was therefore considered typical. Those data points were taken from agricultural census data, which later enabled the researcher also to create nationwide projections of their results.

“Lettuce yields increased by over 400% compared to unshaded control plants, and 200% relative to national average yields,” Jamil said about the results. “60% transparent blue Cd-Te and 44% transparent crystalline silicon PV modules delivered the highest productivity gains, demonstrating the importance of both shading intensity and spectral quality in boosting plant growth.”

Jamil further added that if agrivoltaic were to scale up to protect Canada’s entire lettuce crop, they could add 392,000 tonnes of lettuce.

“That translates into CAD $62.9 billion (USD $46.6 billion) in revenue over 25 years,” he said. “If scaled across Canada, agrivoltaics could also reduce 6.4 million tonnes of CO2 emissions over 25 years, making it a key player in reducing the agricultural sector’s environmental footprint.”

The results of the research work were presented in “Enhancing heat stress tolerance in organic romaine lettuce using crystalline silicon and red, blue & green-colored thin film agrivoltaic systems,” published in Solar Energy.

Polysilicon trading in China remained largely inactive, with production cuts accelerating and wafer prices falling week on week, while downstream cell prices continued to rise and module prices held steady, according to a trade group representing China's nonferrous metals sector.

The China Nonferrous Metals Industry Association (CNMA) said polysilicon trading remained largely stalled, with only limited exploratory orders completed. One leading producer has halted operations, while two others have implemented production cuts. January output is expected to fall by about 15% month on month, broadly in line with wafer production schedules, with February output forecast at 82,000 to 85,000 metric tons. The association said most wafer prices declined week on week, with average transaction prices at CNY 1.26 per piece for n-type G10L wafers, down 3.82%; CNY 1.32 for n-type G12R wafers, down 7.04%; and CNY 1.52 for n-type G12 wafers, down 8.43%. Downstream cell prices rose to CNY 0.41/W to CNY 0.45/W, up 4.88%, while module prices were stable at CNY 0.71/W to CNY 0.75/W.

Hoymiles has signed a supply contract with Indian renewable energy solutions provider KOSOL Energie to deliver 360 MW of its HMS series microinverters in 2026. The company said the products are optimized for India’s high-temperature, high-humidity, and high-irradiance conditions, as well as for larger module formats, large-scale commercial and industrial rooftops, and complex grid environments.

Boway Alloy has issued a profit warning, forecasting full-year 2025 net profit attributable to shareholders of CNY 100 million to CNY 150 million, down 88.9% to 92.6% year on year. The China-listed parent of Vietnam-based Boviet Solar said the decline reflects impairment charges linked to high US anti-dumping and countervailing duties on Vietnam-manufactured products, which made relocating production uneconomic, as well as reduced subsidies and order losses at its United States subsidiary following passage of the United States “Big and Beautiful” Act. Boway Alloy said it is exploring equity divestment options.

PowerChina has signed an engineering, procurement and construction (EPC) contract through its Colombia branch for a 251 MW solar project in Santander province, Colombia. The scope includes PV plant development, equipment supply, installation and commissioning, with a string inverter plus tracking system configuration intended to improve generation efficiency and operational stability.

Deye said it submitted an application on Jan. 27 to issue H shares and list on the main board of the Hong Kong Stock Exchange. The company said its listing application materials were published on the exchange’s website the same day.

This week Women in Solar+ Europe gives voice to Alba Sande, lawyer at Spanish law firm ASande Legal. She states that, despite progress, women remain underrepresented in the renewable energy industry. "As a woman and a mother, I have often encountered the unspoken assumption that professional ambition must take a backseat to family life, a bias rarely applied to men," she says.

The solar, energy storage, EV charging, and grid infrastructure sectors sit at the heart of the energy transition. What makes these industries particularly suited to, and in need of, gender diversity and inclusion is the nature of the challenge itself. The energy transition demands innovative thinking, long-term vision, and the ability to manage complexity across technical, legal, regulatory, and social dimensions. Gender diversity brings varied perspectives, leadership styles, and problem-solving approaches. Inclusion ensures those voices are heard and valued.

These industries work best when they reflect the diversity of the communities they serve. Decision-making becomes stronger when collaboration replaces uniformity. Diverse teams are not only fairer; they are more effective, more resilient, and better prepared to build a sustainable future.

From my experience, diversity, equity, and inclusion are directly linked to the resilience and success of the renewable energy sector. DEI broadens the range of inputs organizations rely on to navigate complexity. Inclusive workplaces foster trust and psychological safety, encouraging open dialogue and the kind of bold ideas that innovation requires. This is essential in a fast-evolving sector like renewable energy, where adaptation is constant. When professionals feel empowered to contribute, retention improves, decision-making becomes more robust, and strategies are better aligned with societal needs. DEI is not separate from business success, it is integral to long-term impact.

Looking back at my own career, I encountered systemic barriers that many women in male-dominated industries will recognise. Implicit biases about how leadership should look and sound, often shaped by traditional models, were persistent. The absence of visible female role models and the lack of structural support, particularly for those balancing care responsibilities, created additional friction. Overcoming these challenges required building strong support networks, staying grounded in purpose, and allowing results to speak clearly. It also meant resisting pressure to “fit the mould” and instead demonstrating that strategic thinking, empathy, and consistency are powerful leadership traits.

Over time, I have observed important shifts in how the industry approaches gender inclusion in leadership. There is greater recognition that diverse leadership is not simply desirable; it is necessary. We are seeing more women in strategic roles and greater openness to flexible career paths. That said, inclusion at senior levels still requires deliberate effort. True progress happens when organisations understand that leadership potential is not tied to a single profile or personal circumstance. Valuing varied life experiences, including those shaped by caregiving, strengthens leadership culture and builds resilience.

Navigating bias and scepticism has been a defining part of my professional journey. As a woman and a mother, I have often encountered the unspoken assumption that professional ambition must take a backseat to family life, a bias rarely applied to men. Yet this is not about choosing one over the other; it is about integration. Early on, I realised that women with young children are frequently expected to prove they are prioritising work in order to be taken seriously. My response was consistency, results, and a clear message: commitment is not gendered.

Even today, driving DEI initiatives at an executive level remains challenging. Despite progress, women remain underrepresented in decision-making spaces. In my experience, around 80% of strategic meetings still involve only men, particularly when critical decisions are being made. One of the greatest challenges is feeling like an equal, owning expertise, and expressing it with confidence in environments where women are often required to repeatedly prove their competence, while male colleagues are assumed to be capable by default. This imbalance makes DEI both essential and deeply personal to lead.

There are still specific gender dynamics within the energy sector that influence career progression. Women, especially mothers, are more frequently questioned about long-term commitment or availability. There remains an unequal expectation to prove expertise. While these dynamics are evolving, progress is slow. Acknowledging them and addressing them without penalising different life experiences is essential for building an inclusive, high-performing industry.

To young women entering the solar and renewable energy sector today, my advice is simple: believe in your voice and your contribution from day one. This industry needs critical thinkers, communicators, and leaders who reflect the diversity of society. Do not allow outdated assumptions to shape your path. Seek mentors who support your growth and organisations that recognise potential beyond traditional models. Being a woman is not a limitation, even when you are the only one in the room. Trust your expertise, ask questions boldly, and bring your full self to the table. The sector will be stronger for it.

Alba Sande is an administrative and regulatory lawyer specialised in energy, environment, and infrastructure. After several years advising major national and international clients at Clifford Chance Madrid, she founded Asandelegal, a boutique legal practice focused on strategic regulatory support for the energy transition. Her experience includes advising banks, funds, and energy companies on permitting, litigation, and regulatory matters in large-scale renewable energy projects—especially wind, solar PV, and storage. Alba holds a double degree in Law and Economics (ICADE) and a Master’s in Energy from the Spanish Energy Club. She is a regular contributor to industry publications and a speaker at sectoral forums. As a woman and mother working in a traditionally male-dominated industry, she is an advocate for inclusive leadership and visibility of diverse talent in energy law and infrastructure. She believes that legal certainty, diversity, and sustainability must go hand in hand to meet the challenges of the green transition.

Interested in joining Alba Sande and other women industry leaders and experts at Women in Solar+ Europe? Find out more: www.wiseu.network

In a new weekly update for pv magazine, Solcast, a DNV company, reports that in January most of East Asia experienced normal to above-average solar irradiance, with southeastern China seeing surges due to reduced clouds and low aerosol levels under lingering La Niña effects. In contrast, the Philippines faced below-average irradiance from early Tropical Storm Nokaen, while other regional cities like Seoul, Tokyo, and Taipei recorded modest gains.

Most of East Asia recorded normal to above‑normal solar irradiance in January, as weak La Niña conditions continued to influence regional weather patterns. The largest gains were observed across southeastern China, where suppressed cloud formation and reduced aerosol-effects delivered a strong start to the year for solar operators, while unusual early tropical storm activity brought significant rainfall and irradiance losses to parts of the Philippines. With two days left in January at time of publishing, this data uses live data from 1-29 January, and forecasts for 30-31 Jan from the Solcast API.

Irradiance in southeastern China surged well above historical averages in January, with Hong Kong exceeding 25% above average. A dominant Siberian high pressure system, with temperatures in parts of Siberia more than 10 C below normal, extended into western China. The resulting northerly flow delivered drier air into southeastern China, reducing both precipitation and cloud formation. This irradiance pattern aligns with typical La Niña effects, even though the La Niña signal was weak and fading toward neutral by late January. Additionally, lower than normal aerosol levels contributed to above average irradiance in coastal parts of China.

In a continuation of the irradiance and aerosol pattern seen in 2025, many parts of China, in particular low-lying industrial areas saw significant drops in aerosol load and a corresponding increase in available irradiance. Both Hong Kong and Shanghai regions saw significantly lower winter average aerosol loads, than the historical average for winter months from 2007-2026. Whilst this supported the exceptionally high irradiance in Hong Kong through January, Shanghai recorded slightly above-average irradiance, despite experiencing a rare snowfall late in the month. By contrast, Beijing has historically lower aerosol loads, however still saw slightly below-average irradiance due to prevailing cloud levels.

Elsewhere in East Asia, irradiance levels were generally normal to above normal for this month. Seoul and Tokyo recorded irradiance 5–10% above January averages and Taipei saw gains exceeding 10%. Across the maritime continent, irradiance and precipitation anomalies were near normal.

The most significant negative irradiance anomaly in the region was associated with Tropical Storm Nokaen (Ada), which marked an unusually early start to the 2026 Pacific typhoon season. Making landfall in January—the first such occurrence since 2019— Nokaen delivered intense rainfall and heavy cloud cover to the central and northern Philippines. Daily rainfall totals reached up to 200 mm, triggering mudslides and widespread disruption. Irradiance across the northern Philippines dropped by as much as 10% below average, while the southern parts of the archipelago, spared from the worst of the storm, saw irradiance climb to 10% above average.

Solcast produces these figures by tracking clouds and aerosols at 1-2km resolution globally, using satellite data and proprietary AI/ML algorithms. This data is used to drive irradiance models, enabling Solcast to calculate irradiance at high resolution, with typical bias of less than 2%, and also cloud-tracking forecasts. This data is used by more than 350 companies managing over 300 GW of solar assets globally.

Researchers at SUPSI found that six Swiss PV systems installed in the late 1980s and early 1990s show exceptionally low degradation rates of just 0.16% to 0.24% per year after more than 30 years of operation. The study shows that thermal stress, ventilation, and material design play a greater role in long-term module reliability than altitude or irradiance alone.

A research group led by Switzerland's University of Applied Sciences (SUPSI) has carried out a long-term analysis of six south-facing, grid-connected PV systems installed in Switzerland in the late 1980s and early 1990s. The researchers found that the systems’ annual power loss rates averaged 0.16% to 0.24%, significantly lower than the 0.75% to 1% per year commonly reported in the literature.

The study examined four low-altitude rooftop systems located in Möhlin (310m-VR-AM55), Tiergarten East and West in Burgdorf (533m-VR-SM55(HO)), and Burgdorf Fink (552m-BA-SM55). These installations use ventilated or building-applied rooftop configurations. The analysis also included a mid-altitude utility-scale plant in Mont-Soleil (1270m-OR-SM55) and two high-altitude, facade-mounted systems in Birg (2677m-VF-AM55) and Jungfraujoch (3462m-VF-SM75).

All systems are equipped with either ARCO AM55 modules manufactured by US-based Arco Solar, which was the world’s largest PV manufacturer with just 1 MW capacity at the time, or Siemens SM55, SM55-HO, and SM75 modules. Siemens became Arco Solar’s largest shareholder in 1990. The modules have rated power outputs between 48 W and 55 W and consist of a glass front sheet, ethylene-vinyl acetate (EVA) encapsulant layers, monocrystalline silicon cells, and a polymer backsheet laminate.

The test setup included on-site monitoring of AC and DC power output, ambient and module temperatures, and plane-of-array irradiance measured using pyranometers. Based on site conditions, the researchers classified the installations into low-, mid-, and high-altitude climate zones.

“For benchmarking purposes, two Siemens SM55 modules have been stored in a controlled indoor environment at the Photovoltaic Laboratory of the Bern University of Applied Sciences since the start of the monitoring campaign,” the researchers said. They also applied the multi-annual year-on-year (multi-YoY) method to determine system-level performance loss rates (PLR).

The results show that PLRs across all systems range from -0.12% to -0.55% per year, with an average of -0.24% to -0.16% per year, well below typical degradation rates reported for both older and modern PV systems. The researchers also found that higher-altitude systems generally exhibit higher average performance ratios and lower degradation rates than comparable low-altitude installations, despite exposure to higher irradiance and ultraviolet radiation.

The study further revealed that modules of the same nominal type but with different internal designs show markedly different degradation behaviour. Standard SM55 modules exhibited recurring solder bond failures, leading to increased series resistance and reduced fill factor. By contrast, SM55-HO modules benefited from a modified backsheet design that provides higher internal reflectance and improved long-term stability.

Overall, the findings indicate that long-term degradation in early-generation PV modules is driven primarily by thermal stress, ventilation conditions, and material design, rather than altitude or irradiance alone. Modules installed in cooler, better-ventilated environments demonstrated particularly stable performance over multiple decades.

The test results were presented in the paper “Three decades, three climates: environmental and material impacts on the long-term reliability of photovoltaic modules,” published in EES Solar.

“The study identified the bill-of-material (BOM) as the most critical factor influencing PV module longevity,” they concluded. “Despite all modules belonging to the same product family, variations in encapsulant quality, filler materials, and manufacturing processes resulted in significant differences in degradation rates. Early-generation encapsulants without UV stabilisation showed accelerated ageing, while later module designs with optimised backsheets and improved production quality demonstrated outstanding long-term stability.”

Sweden deployed less solar in 2025 than the year prior despite record growth in the large-scale segment. Solar association Svensk Solenergi predicts last year was likely the bottom of Sweden's installation curve.

Sweden commissioned 652 MW of new solar last year, according to estimates from Swedish solar association Svensk Solenergi. The figure is down on the 848 MW installed in 2024 and takes cumulative capacity to around 5.4 GW.

Residential installations totaled 239 MW in 2025, a 39% year-on-year decrease. Alex Jankell, head of politics at Svensk Solenergi, told pv magazine the household market has been impacted by the removal of a tax rebate scheme as of the start of this year. He added that lower energy prices in comparison to massive hikes in 2022, higher interest rates and inflation have also impacted the market segment.

Although the residential market contracted in 2025, installations smaller than 20 kW continue to represent more than half of Sweden’s solar market, with a little over 3 GW of total capacity. There are now just over 287,000 solar power plants of less than 20 kW in Sweden, equivalent to 90% of all grid-connected solar plants.

Commercial and industrial installations reached 215 MW in 2025, down 35% year-on-year, but utility-scale installations increased, deploying a record 198 MW for 46% more than in 2024.

The large-scale segment accounted for 30% of new solar power in 2025, compared to 7% in 2024. New installations were led by Sweden’s largest solar plant to date, the 100 MW Hultsfred solar farm, and the 64 MW Ax-el solar park. Last year also saw developer Svea Solar announce plans to build eight new solar parks in Sweden with a total capacity of approximately 500 MW.

Jankell said the market is experiencing a shift to more large-scale solar, often combined with large-scale battery installations, but added that challenges remain in high costs or long waiting times for grid connections. He recommended Sweden adopt proposed changes to permitting procedures to make them quicker and more predictable.

The residential battery market is also broadening, with preliminary figures from the Swedish Tax Agency showing around 75,000 private individuals received a green reduction for battery installations in 2025, a 34% increase on the previous year.

Jankell suggested that Sweden’s solar market could be supported further by abolishing energy tax for all electricity that is produced and consumed behind the same meter and implementing proper power-tariffs which reflectively reward the ability of solar and battery installations to help the grid. He also recommended proposed proper revenue frames for Swedish grid companies that reward flexibility, and not only grid expansion.

Jankell told pv magazine more solar is likely to be installed this year than in 2025. “Given the implementation of solar demands in the Energy Performance of Buildings Directive, new permitting processes on the way, and a general deflation of PV and battery prices, we predict that 2025 is the bottom of the installation curve,” he said.

In a new weekly update for pv magazine, OPIS, a Dow Jones company, provides a quick look at the main price trends in the global PV industry.

China’s TOPCon cell prices rose for a fourth consecutive week, led by higher production costs from surging silver prices and ongoing discussions around the removal of export tax rebates. In contrast, PERC cell prices declined amid weakening demand, due to the industry’s continued technological shift towards TOPCon cells, according to trade sources.

According to the OPIS Global Solar Markets Report released on January 20, Chinese TOPCon M10 cell prices were assessed 2.24% higher on the week at $0.0547/W Free-On-Board (FOB) China. Meanwhile, FOB China Mono PERC M10 cells fell 2.53% to $0.0463/W over the same period.

Silver prices have surged to record highs, gaining more than 40% year-to-date, driven by rising industrial demand and increased investment flows. Chinese policy developments have also further tightened the market, with authorities introducing export restrictions on silver through 2027.

Under the new framework, only 44 approved companies are permitted to export silver under a quota-based licensing system, requiring exporters to secure approval for overseas shipments.

Market sources said silver prices have become a key variable for cell pricing, as silver now represents one of the largest cost components in TOPCon cell manufacturing. Several sources noted that even if upstream prices soften from Q2 2026, cell and module prices are unlikely to retreat to 2025 price levels should silver prices remain elevated.

Since the start of this year, downstream OPIS TOPCon cell prices have surged 46%, while TOPCon module prices climbed nearly 35%. Upstream cost increases have been more modest, with OPIS China Mono Premium—OPIS' assessment for mono-grade polysilicon used in N-type ingot production—up 0.15% and N-type wafer prices up around 13% over the same period.

This week, upstream polysilicon and wafers segments showed early signs of weakness, with OPIS China Mono Premium and N-type M10 wafers down 2.34% and 2.20%, respectively. In contrast, FOB China TOPCon modules continued to edge higher by 3.48% over the same period.

According to the China Nonferrous Metals Industry Association (CNMIA), sentiment in the wafer segment remained cautious this week, with upstream and downstream players locked in a stalemate. Despite continued price gains in cells and modules, driven by export tax rebate policy changes and rising silver prices, price increases have yet to effectively transmit upstream.

CNMIA noted that domestic end demand remains sluggish, and under cost pressure, cell manufacturers have become increasingly reluctant to accept high-priced wafers, resulting in few wafer procurement orders.

With downstream demand unlikely to recover meaningfully before the Lunar New Year, and polysilicon prices showing signs of softening, the wafer market is expected to stay weak in the near term, the association added.

Downstream sources added that higher production costs, combined with weak end-user module demand, could limit cell output levels in the longer term.

Market analysts have previously projected China’s installation demand to fall by over 20% in 2026, following the transition from feed-in-tariffs to a market-based electricity pricing mechanism. Furthermore, the planned removal of export tax rebates may weigh on overseas demand, reinforcing a bearish demand outlook for cells later this year, sources said.

OPIS, a Dow Jones company, provides energy prices, news, data, and analysis on gasoline, diesel, jet fuel, LPG/NGL, coal, metals, and chemicals, as well as renewable fuels and environmental commodities. It acquired pricing data assets from Singapore Solar Exchange in 2022 and now publishes the OPIS APAC Solar Weekly Report.

Dutch utility Eneco is testing low-noise air-to-water heat pumps from startup Whspr in around 20 homes, aiming to ease installation constraints near property boundaries. The systems reportedly achieve coefficients of performance of up to 5 and show up to 80% noise reduction in laboratory testing.

Dutch utility Eneco has begun testing an”innovative” type of air-to-water heat pump with low sound levels in residential buildings.

The company said conventional heat pumps rely on outdoor units that emit a constant hum, requiring installations several metres from property boundaries under Dutch building regulations and often forcing placement in prominent locations on terraced houses. By contrast, the “silent” heat pumps under test can be installed just 30 cm from the boundary.

“The pilot will provide insight into both ease of installation and real-world performance,” Eneco said in a statement. “The results will be used to further optimize the system, with the aim of making it widely available by the end of the summer.” The company added that around 20 homes are currently equipped with the systems to assess noise levels without “compromising residents’ everyday heating comfort.”

The heat pumps are supplied by Dutch startup Whspr. “Our 4 kW freestanding hybrid monoblock systems are designed for domestic space heating,” founder Hugo Huis in ’t Veld told pv magazine.

The unit measures 60 cm × 60 cm × 90 cm and weighs around 70 kg. “It is compact yet robust,” Huis in ’t Veld said, adding that initial measurements show efficiencies in line with the market, with coefficients of performance (COP) of between 4.5 and 5.0.

According to the manufacturer, the heat pump uses propane (R290) as its refrigerant and shows up to 80% noise reduction in laboratory testing.

Whspr also highlights ease of installation, stating that a single installer can fit and connect the unit, including the water side, in one day. A dedicated control and thermostat system has also been developed to reduce compatibility issues and simplify commissioning.

Further technical details have not yet been disclosed. “We are not at liberty to share designs at this stage, as patents are still pending,” Huis in ’t Veld said.

Eneco noted that pilot installations include both standard locations and more complex sites, such as rooftops and sheds at the end of gardens. The systems have also been installed in several rental homes owned by housing association Wooncompagnie. “Testing will continue until the end of April, after which the heat pumps will be further optimized,” the company said.

The UK-based perovskite solar PV specialist has announced a new metrology research project with Swansea University and a new development agreement with Renolit, a German plastic films, sheets and polymer solutions company.

Power Roll, a UK-based perovskite solar PV specialist, has announced a new metrology research project with Swansea University and a joint development agreement with Renolit, a German plastic films, sheets and polymer solutions company, which will begin with an outdoor field trial in Germany.

In the U.K., samples of Power Roll's patented flexible, micro-groove perovskite solar PV film will be provided to researchers at Swansea University and the National Physical Laboratory in a six-month feasibility project to support the development of inline and end-of-line testing tools for perovskite solar cells.

It also involves the development of stability guidelines for industry standards. Without these advancements, perovskite solar cell companies “could face significant hurdles in achieving product accreditation,” noted the company.

“The project will support scalable roll-to-roll manufacturing of lightweight perovskite PV, delivering commercial prototypes, testing protocols, and an invited academic review to strengthen UK capability in advanced semiconductor photovoltaics,” Nathan Hill, Power Roll Senior Scientist, told pv magazine.

It entails assessment of standards, metrology techniques, equipment, routes to characterize large scale devices and artificial intelligence (AI) pertaining to monitoring during manufacture.

In December, Renolit and Power Roll announced an 18-month joint development agreement that will begin with an outdoor trial of the UK company’s micro-groove perovskite prototypes on a Renolit building façade in Germany.

The initial deployment will be one to two square meters. There are plans to scale it up in size and power capacity as the project progresses, according to Hill.

“The purpose is to monitor and validate real-world performance and durability, and to understand the potential of the micro-groove solar technology,” Neil Spann, Power Roll CEO, told pv magazine.

Renolit has a commercial interest as a potential supplier of certain film layers to Power Roll, but also to explore integrating Power Roll's solar film into its existing building materials product lines, and to explore the potential of manufacturing under license in Europe, according to Spann.

Power Roll has also completed tests of smaller devices at its headquarters.

Renolit France, the French branch of the German company, recently launched a new PVC-based mounting product for rooftop PV systems.

Power Roll, founded in 2012, has proven its technology and manufacturing process, and secured 27 patent families.

Researchers in South Korea improved the performance of tin monosulfide (SnS) solar cells with a potassium fluoride-assisted post-treatment and a vapor transport deposition process. The treated solar cells had a power conversion efficiency of 4.10% and reduced recombination sites, compared to 3.42% for untreated devices.

Research led by Chonnam National University in South Korea has improved the performance of tin monosulfide (SnS) solar cells with a potassium fluoride-assisted (KF) post-treatment and a vapor transport deposition (VTD) process. The treated solar cells had a power conversion efficiency of 4.10% and reduced recombination sites, compared to control devices.

The research topic is complementary to the research group's earlier germanium oxide (GeOx) interlayer study, which achieved a 4.81% cell efficiency, according to first author of the research, Rahul Kumar Yadav.

“The KF treatment enhances the intrinsic quality of the SnS absorber surface, providing a superior foundation for subsequent interface engineering, while the GeO_x interlayer optimizes band alignment and suppresses recombination at the rear contact,” Kumar Yadav, told pv magazine.

“In our ongoing work, we are actively combining KF surface treatment with GeO_x back interface engineering, as we expect their integration to deliver further gains in voltage, operational stability, and overall device efficiency,” he added.

In the study, the researchers varied the concentration of KF solution to measure the effect of drop-cast KF surface treatment on the structural, morphological, and photovoltaic properties of VTD-SnS absorber layers.

Testing showed that the KF treatment enhanced “film uniformity, densification, and wettability.” Devices based on the optimized KF-treated SnS absorber had a PCE 4.10%, an improvement compared to 3.42% for untreated devices, with further analysis revealing reduced recombination sites.

“The KF-assisted solution post-treatment functions as a surface modulation step, improving grain connectivity, reducing surface roughness, and passivating electrically active defects,” said Kumar Yadav, adding that the resulting higher open-circuit voltage and fill factor, enabled enhanced efficiency “without altering the overall device architecture.”

The researchers concluded that the research represents a “scalable strategy to overcome key interfacial limitations” and to advance SnS thin-film photovoltaics.

Also participating in the study were Korea Aerospace University and Kyungpook National University.

The work is detailed in “Modulating surface morphology via potassium fluoride-assisted solution post-treatment enables VTD-SnS thin film solar cells to achieve over 4% efficiency,” which appears in Materials Today Energy.

Looking ahead, the group is focused on developing SnS thin-film solar cells beyond the 4% efficiency threshold “through coordinated absorber surface, heterojunction interface, and rear interface engineering, while maintaining compatibility with scalable manufacturing processes,” said Kumar Yadav.

The new Tesla Solar Panel and mounting system pairs with the company’s inverter, Powerwall battery, EV charging and vehicles, creating an all-Tesla residential solar offering for the first time.

From pv magazine USA

In the residential solar sector, the industry has long sought the “holy grail” of vertical integration, creating a single point of contact for hardware, software, and energy management.

While Tesla has been a dominant player in storage with the Powerwall, a market leader with its inverter, and in electric vehicles, the company has historically relied on third-party solar panels.

With the launch of the Tesla Solar Panel (TSP-415 and TSP-420), the company is closing that loop. The company’s new modules, assembled at its Gigafactory in Buffalo, New York, represent a significant shift toward a proprietary, integrated ecosystem designed to solve the common rooftop challenges of shading, aesthetic clutter, and installation friction.

“This panel completes the full package of the residential energy ecosystem,” Colby Hastings, senior director, Tesla Energy, told pv magazine USA. “It is based on our long history of innovation and engineering when it comes to solar.”

Domestic manufacturing

Tesla said the new modules are assembled at its Buffalo, NY facility, the same site where it continues to produce Solar Roof components, which inspired the design of the panel. The factory is currently scaling to an initial capacity of over 300 MW per year.

This domestic assembly allows Tesla to leverage federal manufacturing incentives while securing a local supply chain for its growing network of installers.

Power zones

The most technically significant departure from industry norms in the TSP series is the implementation of 18 independent “Power Zones.” Standard residential modules typically utilize three bypass diodes, creating six distinct zones. In traditional architectures, a single shadow from a chimney or vent pipe can effectively “shut down” large swaths of a string’s production.

Tesla’s design essentially triples the granularity of the module. By dividing the electrical architecture into 18 zones, the panel behaves more like a digital screen with a higher pixel count; if one “pixel” is shaded, the remaining 17 continue to harvest energy at near-peak efficiency.

While high-density substring architectures have been explored in the utility space, Tesla’s specific 18-zone layout is unique to the residential market, engineered to deliver optimizer-like performance without the added cost and potential failure points of module-level power electronics (MLPE) on the roof.

Inverters, batteries, and mounts

The TSP modules are designed to pair specifically with the Tesla Solar Inverter and Powerwall 3. While Tesla offers these as a unified “Home Energy Ecosystem,” they are not strictly sold as a single, inseparable bundle. However, the hardware is optimized to work as a package; for instance, the panel’s 18-zone design is specifically tuned to perform with Tesla’s string inverter technology.

Tesla is not keeping this technology exclusive to its own crews. While Tesla’s direct installation business leads the rollout, the package is available to Tesla’s network of over 1,000 certified installers.

This “installer-first” approach is further evidenced by the new Tesla Panel Mount. The new rail-less mounting system, made of black anodized aluminum alloy, uses the module frame itself as the structural rail.

By eliminating traditional rails and visible clamps, Tesla said the system is 33% faster to install. The mount sits closer to the roof and is enhanced by aesthetic front and side skirts, maintaining the “minimalist” look Tesla consumers expect.

Product specs

The modules are competitive with the current Tier 1 market, pushing into the 20% efficiency bracket while maintaining a robust mechanical profile, said the company.

 The new Tesla Solar Panels are now available nationwide. 

Solar roof 

For those wondering about the Tesla Solar Roof, the company maintains that the glass tile product remains a core part of its “premium” offering for customers needing a full roof replacement.

The cascading cell technology used in the new TSP modules, which overlaps cells to eliminate visible silver busbars, was originally designed in its Solar Roof product. Tesla is essentially taking the aesthetic and electrical innovations of its luxury roof product and integrating it into a traditional module form factor.

Virtual power plant

Tesla also highlighted the ability for virtual power plant (VPP) participation to increase value for its customers. VPPs coordinate the dispatch of energy stored in Powerwalls, acting as a distributed energy network. 

“We’re working more closely with utilities than ever to ensure that these assets participate in virtual power plants and support the grid and opening up new value streams, both for utilities and consumers that have these assets at home,” said Hastings. “We announced recently that we have a million Powerwalls deployed worldwide and 25% of those are enrolled in a virtual power plant program of some kind.”

Market strategy

The timing of this launch comes at a volatile moment for U.S. solar. With the passage of the “One Big Beautiful Bill” Act (OBBBA), the industry is navigating the early expiration of the 25D residential credit at the end of 2025 and the sunsetting of the 48E commercial credit.

Tesla’s move now is an opportunistic play for standardization and soft-cost reduction. By controlling the entire stack, Tesla can drive down customer acquisition and labor costs, which currently represent the largest portion of a system’s price tag.

“Utility rates across the country are going up, electricity is becoming increasingly unaffordable for homeowners,” said Hastings. “We’re still very bullish on the future of distributed energy here in the United States.”

Sungrow is introducing its large-scale energy storage system, PowerTitan 3.0, to Europe, featuring grid-forming capability, next-generation battery cells, DC coupling for co-located solar projects, and streamlined commissioning to accelerate deployment.

Sungrow is introducing its large-scale energy storage system, PowerTitan 3.0, to the European market. With the option to connect the battery to a central inverter on the DC side, the company is responding to strong demand for co-located solar-storage projects. The system was first presented at SNEC in Shanghai in June 2025 and has now been showcased to European developers at an event in Madrid.

The storage system is available in standard 10- and 20-foot container formats. The 20-foot version integrates a 1.78 MW power conversion system (PCS) with a 7.14 MWh battery, providing four hours of storage in a single container. A 30-foot version with roughly 12 MWh, also displayed in China, will not be offered in Europe due to logistics and transport costs, which could reduce project profitability. Larger systems in Europe can be achieved by connecting four units to form an AC block with approximately 7.2 MW of power and 28.5 MWh of capacity.

The higher energy density is enabled by new 648 Ah battery cells, with a volumetric energy density exceeding 440 Wh/L. A full liquid-cooling system and updated software maintain all cells within their optimal temperature range, reducing the system’s own energy consumption by around 10%, according to Sungrow. The company guarantees 10,000 cycles at 60% remaining capacity. State of charge is monitored at the rack level and synchronized across the system.

“We are seeing growing demand for stand-alone projects and a significant increase in co-location projects across Europe,” said Moritz Rolf, VP DACH at Sungrow. The DC coupling option is key to meeting this demand.

Paired with a PV system and Sungrow’s “1+X” central inverter, no separate PCS or medium-voltage switchgear is needed. The company estimates hardware and cabling savings for a 150 MWh project at around €1 million.

When connected on the AC side, the system includes an integrated PCS using silicon carbide MOSFETs. Maximum PCS efficiency is 99.5%, with a round-trip efficiency of 92%.

Fast commissioning

The PowerTitan 3.0 is delivered fully assembled and pre-configured. Commissioning is largely autonomous, taking about one hour per unit. A project can be connected to the grid in approximately 12 days, with no on-site parameterization required.

The system can also serve as an AC power source for plant certification tests. If a grid connection is not yet available, the battery can energize medium-voltage switchgear, inverters, and other equipment, simplifying logistics for commissioning and testing.

“Having completed the first stage of the energy transition—the expansion of renewables and their market integration—we are now entering the next phase: electrification, flexibility, and supply security,” said James Li, VP Europe of Sungrow, during a panel discussion.

Grid-forming capabilities were a central theme of the presentation. The system can provide short-circuit current with a ratio of 1.2, deliver instantaneous reserve power within five milliseconds, and contribute to harmonic attenuation, supporting grid strength and stability.

Antonio Arruebo, battery storage analyst at SolarPower Europe, highlighted the growing importance of these functions. Beyond frequency services, markets for instantaneous reserve, short-circuit current, and black-start capability are emerging across Europe. He stressed the need for early development of corresponding markets at EU and national levels, faster approval and certification processes for storage systems, and reduction of duplicate grid fees.

Key challenges

Discussions with event participants highlighted that, while the European battery storage market is developing positively overall, project financing remains a critical bottleneck. Highly leveraged projects are subject to intensive risk assessments by lenders, particularly regarding the valuation of future revenues from arbitrage and frequency markets. The long-term development of these markets is difficult to predict, directly affecting risk premiums and financing terms. Multi-bank financing structures appear to be becoming increasingly common.

From an investor perspective, the stability of revenue streams and technological risks are central. “The crucial factors are the resilience of the revenues and the likelihood of market mechanisms changing over time,” said Paula Renedo, Principal Engineer Director at Nuveen Infrastructure, during a panel discussion.

For battery storage, the balance between exposure to the stock market and contractually secured revenues is evolving. Creditworthiness of customers and technological reliability are gaining greater importance. “We look closely at proven technologies with robust operational experience, particularly regarding availability and degradation over the system’s lifespan,” Renedo added. Nuveen adopts conservative assumptions and engages external technical consultants to assess and mitigate these risks.

On pricing trends in the battery segment, and the Chinese government’s announcement requiring battery cell manufacturers to adopt “sustainable pricing,” Moritz Rolf noted that comparisons with recent photovoltaic module price trends are limited. PV modules have reached a high degree of commodification, whereas integrated large-scale storage systems involve numerous complex integration steps. As a result, prices equivalent to fractions of a cent per kilowatt, as seen in the module market, are not expected. After-sales service and local support remain critical for developers and operators. Sungrow currently employs around 800 people in Europe.

Helioplant will leverage SolarEdge’s inverter and power optimization technology to power its cross-shaped bifacial solar system specially designed for snowy Alpine regions with high elevation. They anticipate ski resorts will be a big market for the solution which uses SolarEdge's technology to overcome shading issues caused by the cross-structure.

The first large-scale installation combining SolarEdge technology and Helioplant’s design is already under construction, and on completion the 6.3 MW system will power three ski resorts in Sölden, Austria.

SolarEdge and Helioplant foresee significant demand for their system from ski resorts located in snowy, mountainous areas where conventional PV installations are a challenge. Standard linear PV systems tend to lose productivity with extreme Alpine conditions, such as snow drifts caused by rapidly changing wind conditions. They are also often difficult, and therefore more expensive, to build in challenging terrain areas.

Helioplant’s cross design, which resembles a tree or a flagpole with four wings, features 15 or 16 bifacial modules depending on the slope. The cross-shaped structure creates air turbulence even at low wind speeds, which prevents snow build-up from accumulating and decreasing efficiency. Snow around the base of the tree-like structure reflects light to the underside of the modules to further boost energy yields in what is known as the albedo effect.

Helioplant piloted an installation with 12 bifacial tree-like structures at 2,850 m in Sölden underneath the Tiefenbach glacier in Austria’s Ötztal Valley in 2023. The PV system powered a ski-lift for an entire season, reducing reliance on grid electricity. It was powered by SolarEdge’s technology.

The 6.3 MW installation now under construction in Austria has around 800 of Helioplant’s structures set at an altitude of 2,850 m to 3,000 m. Completion is expected in the second half of this year, and the installation will cover around one third of the three ski resorts’ annual energy needs – approximately 28 GWh.

Patrick Janak, Head of C&I DACH at SolarEdge said that by combining Helioplant's bifacial structures with SolarEdge inverter and power optimizer technology, the two companies “are bringing superior economics to the table to unlock this largely untapped market.” He claimed that conventional PV systems would not work in this scenario.

“Bifacial PV systems are ideal for alpine regions because they can capture both direct sunlight and reflected light from snow, boosting overall energy yields. With our patented cross-shaped support structure, our solar panels stay snow-free providing maximum yields of clean solar energy to offset the high electricity demands of busy ski resorts. With around 6,000 ski resorts worldwide, there is enormous market potential,” said Florian Jamschek, Co-Founder of Helioplant.

Jamschek added that SolarEdge's technology made it possible to address the problem of shading on the panels which he said is exacerbated by the tree-like structure. “While our tree-like structure for bifacial PV addresses the challenges of solar in high-altitude alpine regions, it also is susceptible to more shading on the panels. The only solution to overcome this problem and maximize energy yields was to incorporate SolarEdge technology. This means we can deliver on our promise to supply reliable and stable clean energy that ski resorts can rely on to offset their high energy demands.”