Another residential solar power system malfunctioned! According to the Rostock Police Headquarters in Germany, a fire broke out at 3 PM on July 5th in a wooden shed within the yard of a detached house in Bentwisch. The investigation indicates that a battery storage module in an installed solar power system inside the shed overheated and ignited the fire. An explosion occurred during firefighting efforts, blowing off the roof and causing the entire structure to collapse. Three volunteer firefighters sustained minor injuries from the explosion. Flying debris also damaged two adjacent properties. The estimated damage is approximately €40,000. Following the incident, police cordoned off the scene. The fire department deployed an excavator and a large water tank to submerge the exploded battery debris in water to prevent further chemical reactions. A total of 75 firefighters from five volunteer fire brigades—Bentwig, Klein Kussewitz, Mönchhagen, Poppendorf, and Rövershagen—were deployed to the rescue operation. The prosecutor's office has ordered the dispatch of experts to determine the cause of the fire, and the criminal police have opened an investigation. Regarding the explosion, Jörg Westphal, deputy captain of the Neustrelitz volunteer fire brigade, explained that photovoltaic equipment is unique in that, in addition to conventional alternating current, it also contains a direct current circuit, with current flowing from the photovoltaic modules to the inverter. Furthermore, this power generation system continuously produces electricity based on real-time sunlight intensity. Based on the situation, the explosion was most likely caused by overcharging of the photovoltaic-energy storage system. (Photovoltaic overcharge explosions typically refer to explosions caused by thermal runaway of the energy storage battery due to overcharging in a "photovoltaic + energy storage" system. The core causes are often electrical system malfunctions or battery management failures.)   Residential photovoltaic-energy storage system explodes twice in two years! This explosion of a photovoltaic system in a German villa is not an isolated incident. Just last year, also in Germany, a villa with a photovoltaic system experienced an explosion. Around February last year, a serious explosion occurred in Schleswig-Holstein, Germany. A residential building was severely damaged; photos from the scene show significant damage to the exterior walls. The local volunteer fire brigade reported: "A loud bang, followed by a pressure wave. Then thick smoke rose." It is understood that although multiple parts of the building caught fire, the fire was quickly brought under control. Fortunately, the severely damaged building was vacant at the time of the incident, but it may be demolished later. It is understood that this was a detached villa equipped with photovoltaic (PV) and energy storage facilities. According to NDR (North German Broadcasting), pr...

German solar PV generation has continued to grow in the first half of 2026, reaching a new all-time high of 43.2TWh. This is according to an analysis by the Fraunhofer Institute for Solar Energy Systems ISE, based on data from the energy-charts.info platform, which highlights a 10% year-on-year increase for solar PV generation in Germany. The European Union experienced a similar trend in the past decade, with solar PV generation rising by 254% since 2015, as shown in the chart below. Solar PV’s share of electricity generation in H1 2026 reached 18.2% in Germany, a 1.3 percentage point increase from the same period last year. During that period, total installed solar PV rose from 118GW to 124.9GW, with ground-mounted systems contributing the most to the growth of solar PV in H1 2026 with 3.5GW. Rooftop solar followed with 2.1GW of new capacity in H1 2026, and solar installations between 30-100kW accounted for 1.1GW of new installed capacity. Despite the continued growth of solar PV by 7GW in the first six months of the year, a joint analysis by Fraunhofer ISE and German think tank Agora Energiewende the changes currently under discussion as part of the EEG amendment could make “smaller rooftop PV systems, in particular, less economically viable under current conditions.” This could create incentives to design systems on a smaller scale or not to fully utilise available rooftop space. Residential solar systems had already been on the decline in the first quarter of 2026, and the German Solar Association (BSW-Solar) warned at the time that further subsidy cuts for PV systems could push installations even lower.   Increase in negative prices for solar PV and wind Moreover, the high levels of solar PV and wind power generation have led to an increased number of hours during which the day-ahead market price for electricity is negative. Solar curtailment reached nearly 3GWh in H1 2026, with the majority of the curtailed solar PV (58.2%) happening when day-ahead prices were negative. This reinforces the need for intraday energy storage and flexibility, according to Fraunhofer ISE. It added that there remains a significant “storage gap” that needs to be closed in order to allow for the shift in surplus electricity to hours of low generation. That is despite the fact that in H1 2026, there has been more large-scale battery storage systems commissioned that the entirety of 2025. At the end of June 2026, installed energy storage rose from 25.4GWh to 29.3GWh. The expansion of battery storage for intraday storage could reduce negative electricity prices on the power exchange during the day and price spikes in evening hours, explained Fraunhofer ISE. “The heat wave in June, which led to increased electricity demand for cooling while conventional power plants were operating at reduced capacity, resulted in particularly sharp price fluctuations during the evening hours,” wrote the German institution.

On June 30, Reuters reported that three sources familiar with the matter told Reuters on Tuesday that the U.S. government is drafting a comprehensive new set of regulations to completely ban the import of Chinese-made photovoltaic and energy storage inverters.   Inverters are core power electronic devices that convert direct current (DC) output from solar panels and energy storage batteries into alternating current (AC) suitable for residential and public power grids; they are known in the industry as the "brain" of new energy power plants.   Chinese manufacturers such as Huawei Digital Energy, Sungrow Power Supply, and Deye Power Technology collectively hold over 60% of the global market share for residential and large-scale power plant-level inverters.   Two senior government officials confirmed that interagency consultations led by the U.S. Department of Commerce's Bureau of Industry and Security (BIS) and the Department of Energy began in April 2026, with a core concern being a security vulnerability in the firmware of Chinese inverters that could allow remote network access.   U.S. officials claim that such devices could be exploited to massively paralyze the U.S. domestic power grid in a national emergency. This proposed new set of regulations plans to completely ban the import of energy inverters manufactured by companies listed on the "Foreign Entities Watch" list.   The list encompasses almost all major Chinese renewable energy equipment manufacturers. Unlike the existing subsidy restrictions under the Inflation Reduction Act (IRA), which only limited projects from claiming federal subsidies, the new order will directly prevent the equipment from clearing customs, regardless of whether the project used government funds.   An informed source involved in drafting the provision stated that the initial draft only included very narrow temporary exemptions: a small amount of residential inventory already shipped to the US would not be affected; however, once the new rule takes effect, all brand-new equipment from Chinese factories will be prohibited from entering the country.   The policy is expected to be officially implemented in early 2027 after a public comment period. Industry associations representing US photovoltaic installers and renewable energy developers warn that the sudden ban will immediately drive up the prices of photovoltaic and energy storage equipment. Currently, Western inverter manufacturers' production capacity is completely insufficient to replace Chinese supplies on a large scale.   Industry organizations say that European suppliers and US startups will need at least two to three years to expand production to match current market demand. Since late 2025, Republican lawmakers have been pressuring the White House to enact stringent inverter restrictions. At that time, over 50 House members jointly wrote to the government, calling for comprehensive import controls on national securit...

Oxford PV, a perovskite photovoltaic specialist, and the Fraunhofer Institute for Solar Energy Research (Fraunhofer ISE) in Germany have jointly unveiled a new module prototype that combines Oxford PV's perovskite-silicon tandem cells with Fraunhofer's shingled matrix interconnect technology.   The new product will be officially showcased at the upcoming Intersolar Europe trade fair in Munich. The two organizations stated that both prototype modules achieve a full-area conversion efficiency of 25.6%.   Stefan Glunz, head of the photovoltaic division at Fraunhofer ISE, explained that in the new design, Oxford PV's tandem cells are cut into tile-like shapes, interconnected using conductive adhesive, and then encapsulated. The entire tandem module employs a double-glass structure with edge sealing to protect the moisture-sensitive perovskite cells.   "We are delighted to be able to integrate two high-tech solutions from Europe into this photovoltaic module," Glunz added.   Ed Crossland, Chief Technology Officer of Oxford PV, emphasized the complementarity of the two technologies. "Our tandem technology is highly compatible with shingled interconnect technology," he said. "Because perovskite-silicon solar cells have a lower current density, the cells can be cut into wider strips, thus improving production efficiency." He further explained that tandem cells have higher open-circuit voltage and conversion efficiency compared to traditional silicon cells; the current is shared by two layers of sub-cells, resulting in a lower overall operating current. Lower current density effectively reduces internal resistance losses within the module.   "Meanwhile, the matrix shingled interconnect uses conductive adhesive, a low-temperature process that eliminates the need for copper busbars throughout," Crossland added. Reducing the use of copper components lowers manufacturing costs and alleviates internal structural stress within the module.   The new design has been applied to two prototype modules: a 491W residential rooftop solar system with an area of ​​1.92㎡; and a 546W bifacial high-power solar panel with an area of ​​2.13㎡. Both modules achieved a conversion efficiency of 25.6% across their entire area.   Crosland stated that the structural design of this prototype module is fully compatible with mass production.   "Oxford PV's HyPERcell cell technology is compatible with multiple interconnect methods. Our current offerings have an efficiency of 25% and a lifespan of ten years, but with continuous improvements in cell and module manufacturing technologies, regardless of module design, we expect to achieve an efficiency of 27% and a lifespan of twenty years by 2027. This year we will launch a product with an efficiency of 26%," he said.   Tannel modules, combining perovskite and silicon-based photovoltaic technologies, are widely regarded as the next major leap forward in the solar technology roadmap. Adding a per...

SUNROVER has successfully concluded its recent visit to its Cuban customers, marking another milestone in its ongoing commitment to delivering reliable global service and localized energy solutions. During this overseas trip, SUNROVER deployed its engineering and maintenance specialists directly to the customer’s project sites, reinforcing the company’s philosophy that true service goes beyond remote support and must be grounded in face-to-face technical engagement, real-world inspection, and continuous international presence.   Throughout the visit, the SUNROVER team conducted comprehensive on-site evaluations of existing photovoltaic and energy storage installations. Rather than relying solely on reported data or remote diagnostics, engineers carefully inspected system performance under actual operating conditions, identified minor operational inefficiencies, and provided immediate corrective measures where needed. This hands-on approach allowed the team to resolve technical issues promptly while gaining a deeper understanding of local environmental conditions, grid stability challenges, and user energy consumption patterns.   A key focus of the visit was direct communication with the customer to understand evolving energy demands and long-term usage expectations. By engaging with the operational reality on the ground, SUNROVER was able to refine a customized photovoltaic-energy storage solution tailored specifically to Cuba’s climate conditions, electricity usage behavior, and infrastructure characteristics. This type of in-person technical collaboration ensures that system design is not only theoretically sound but also practically optimized for durability and performance in real-world scenarios.   During the visit, the customer also reviewed an energy storage system built with SUNROVER 51.2V 200AH wall-mounted lithium batteries and SUNROVER 15KW energy storage inverters. After approximately four months of continuous operation, the system has demonstrated stable performance, reliable power output, and consistent energy storage efficiency. This long-term stability has strengthened customer confidence in the system’s ability to support daily electricity needs, particularly in environments where power fluctuations and grid interruptions may occur.   Wall-mounted lithium battery systems, such as SUNROVER’s 51.2V 200AH configuration, are increasingly recognized in the global energy storage market for their compact structure, flexible installation, and high safety standards. Compared with traditional lead-acid batteries, lithium iron phosphate technology offers significantly longer cycle life, improved thermal stability, and higher usable capacity. The wall-mounted design further enhances installation efficiency by saving floor space, simplifying system integration, and enabling modular expansion for future energy demand growth. Integrated battery management systems ensure precise control over charg...

Solar module prices continued to rise across Europe in May, while buyer confidence recovered to its highest level since the start of the year, according to the latest market report from solar trading platform sun.store. The company’s latest PV Index found that the PV Purchasing Managers’ Index (PMI) increased to 70 in May from 66 in April, indicating stronger purchasing intentions among solar buyers following a brief slowdown last month. The rebound came as module prices continued their upward trajectory across most technology categories, extending a trend that has persisted throughout 2026. According to the report, tunnel oxide passivated contact (TOPCon) bifacial solar modules reached an average price of €0.125/Wp (US$0.14/Wp) in May, up 7% month-on-month, while TOPCon monofacial modules remained unchanged at €0.122/Wp. Sun.store said that the increase in bifacial module pricing was partly driven by a shift towards larger-format modules exceeding 500W. Additionally, premium residential modules witnessed further gains. Full black modules rose 3% month-on-month to €0.128/Wp, while back contact modules increased 4% to €0.134/Wp, making them the highest-priced category tracked by the index. The report suggests that demand for higher-efficiency and premium residential products remains resilient despite rising equipment costs. Based on sales volume through the platform, Trina Solar overtook JA Solar to become the best-selling module supplier in May. LONGi, Jinko Solar and Canadian Solar rounded out the top five manufacturers. While module prices continued to increase, inverter pricing remained largely stable for a third consecutive month. Hybrid inverter prices for systems between 1kW and 15kW were unchanged at €95.34/kW, while larger hybrid systems declined 3% to €79.60/kW. String inverter pricing also showed limited movement, with systems between 1kW and 15kW remaining flat at €44.02/kW and larger systems increasing slightly by 2% to €27.68/kW.   Deye, Huawei lead inverter rankings as prices hold steady In the inverter rankings, Deye maintained its leading position in the hybrid inverter segment ahead of Huawei and GoodWe. In the string inverter category, Huawei reclaimed the top position from Sungrow after briefly losing the lead in April. The report’s PMI survey, based on responses from 1,101 Sun.store users, found that 49% of respondents planned to increase purchases over the coming months, while only 10% expected to reduce procurement activity. The share of buyers planning to cut purchases was the lowest recorded during the reporting period. According to the last report, the PMI fell from 68 to 66 despite continued price increases across most module categories. At the time, sun.store attributed the decline to a moderation in demand growth following what it described as an exceptionally strong first quarter. With both pricing and buyer sentiment moving higher in May, the report sugge...

On May 25th, international oil prices plummeted, while precious metals surged. Spot gold broke through $4570/ounce, rising over 1% intraday. Spot silver touched $78/ounce, rising over 4%. Since 2026, the silver market has experienced a rollercoaster ride: after surging to historical highs at the beginning of the year, it has sharply corrected and is currently maintaining a wide range of high-level fluctuations. As the largest industrial demand sector for silver, photovoltaics is seeing increased silver consumption per unit due to rising penetration rates of high-efficiency cells (TOPCon/HJT/BC). The soaring silver price has become a core pressure on the cost of solar panels.   Silver prices are under pressure due to high-level fluctuations. At the beginning of the year, silver continued its upward trend from 2025, strongly rising due to the triple positive factors of expectations of a Fed rate cut, Middle East geopolitical conflicts, and the essential demand for photovoltaics. In late January, London silver broke through $100/ounce, reaching a nominal historical high of $121/ounce on February 28th. Domestically, the main Shanghai silver futures contract surged in tandem, reaching over 22,000 yuan/kg in mid-April, a quarterly increase of over 60%. In late May, silver prices entered a trading range of $70-85/ounce (London silver) and 17,000-20,000 yuan/kg (Shanghai silver). Institutions predict a "mild decline with wide fluctuations" in the second half of the year: on the one hand, the peak season for global photovoltaic installations in Q3-Q4 will support industrial demand, and a silver supply-demand gap will persist (approximately 60 million ounces in 2026); on the other hand, the accelerated implementation of "de-silvering" technologies, high prices suppressing jewelry demand, coupled with uncertainty surrounding Federal Reserve policies, have weakened silver price rebounds, and prices may fall back to around $70/ounce by the end of the year.   N-type penetration drives up unit silver consumption; photovoltaics becomes the largest industrial demand for silver. Photovoltaics has become the largest industrial demand sector for silver. In 2025, photovoltaic silver consumption accounted for 35% of global industrial silver consumption. Although the "de-silvering" trend accelerated in 2026, the expansion of installed capacity still drove demand to remain high. Comparing the silver consumption of mainstream battery technologies, the penetration rate of N-type high-efficiency batteries, represented by TOPCon/HJT, is rapidly increasing, reaching 70% by the end of 2026, directly driving up the unit silver consumption: Previously, PERC had a silver consumption of 8.5-9.5 mg/W per watt, with a single cell consuming approximately 70 mg of silver; the technology was mature and had the lowest silver consumption. Specifically, TOPCon (N-type, currently the mainstream high-efficiency battery): using a double-sided silver paste process, has a silver con...

  New solar PV installations in China have reached 50.9GW between January and April 2026, according to data from the Chinese National Energy Administration (NEA).   The figures indicate that new PV capacity additions tumbled markedly over the period, while wind power maintained steady growth. Installation figures for the first four months of 2026 represent a 51% drop compared to the 104.93GW registered in the same period of 2025.   Ongoing adjustments continue to drive structural improvements across the country’s power installation mix.   Sharp drop in new PV capacity, April monthly slump most striking   Monthly breakdowns reveal an even steeper downward trajectory. New PV installations stood at merely 9.52GW in April 2026, plummeting 79% year-on-year versus 45.28GW a year earlier. The slowdown carries forward the weak growth momentum seen in the first quarter.   In contrast to the PV installation slump, wind power capacity posted steady growth. China added 21.26GW of new wind capacity from January to April 2026, rising 7% from 19.96GW in the same period last year.   As of the end of April 2026, China’s total installed power generation capacity reached 3,990GW, growing 14.2% year-on-year. The proportion of new energy capacity kept climbing. Solar installed capacity hit 1,250GW, a 26.2% year-on-year rise, and wind power capacity stood at 660GW, up 22.0% year-on-year.   Industry analysts attribute the sharp drop in new PV installations in the first four months to a periodic adjustment after the sector’s robust growth in 2025. The downturn is driven by falling PV module prices, prevalent wait-and-see sentiment and constrained power grid consumption. By contrast, wind power registers solid development thanks to mature technologies and stable power pricing policies.