Shenzhen First Tech Co., Ltd.

Solar Inverter Brings Uninterrupted Power to Remote Indonesian Village June 18, 2025 – Kampung Sumber Rejo, East Java, Indonesia   As the morning sun rises over the lush rice paddies of Kampung Sumber Rejo, a small village tucked away in the hills of East Java, 12-year-old Siti Rahayu skips towards her school, her backpack filled with books and a new notebook. For months, the village’s only primary school had struggled with erratic electricity—blackouts would halt lessons mid-way, laptops would die during online classes, and the school’s water pump would stop working, leaving students thirsty. But today is different.   Look, the lights are on!” Siti exclaims, pointing to the bright LED bulbs lining the school’s veranda. Inside, her teacher, Ms. Dwi, is already setting up projector for a science lesson on photosynthesis. The computer hums quietly, connected to a sleek, silver device mounted on the wall—a solar inverter system that has transformed life at SD Negeri Sumber Rejo.    A Solution for a Village Plagued by Power Outages  Kampung Sumber Rejo, home to 800 residents, relies on a fragile grid that often fails during heavy rains or peak hours. For the school’s 150 students, this meant missed lessons, broken study routines, and limited access to digital resources. Last year, the village council partnered with a regional renewable energy initiative to install a 3.5KVA solar inverter system designed to handle the area’s challenging conditions. “The inverter was chosen specifically for its ability to integrate with our existing solar panels and lithium batteries,” explains Mr. Joko, the village head. “We needed something that could work with both photovoltaic (PV) input and the grid, and this system delivers—even when the sun isn’t shining.”  How the System Works: Technical Strengths in Action  The EM3500-24L, installed in March 2025, combines a high-efficiency MPPT (Maximum Power Point Tracking) solar charger with a pure sine wave inverter, ensuring stable power for sensitive devices like computers and projectors. Its 2000W max PV array power and 60A max solar charge current optimize energy capture from the village’s 4x500W solar panels, while the 96% transfer efficiency (PV to INV) means minimal energy loss during conversion. “Before, when the grid went down, we’d have to wait hours for power to come back,” says Ms. Dwi. “Now, the inverter switches to battery power in 10 milliseconds—faster than I can blink. The students don’t even notice the change.” The system’s lithium battery activation feature (via PV or utility) has been a game-changer for the village’s off-grid days. During a recent 12-hour blackout caused by a fallen tree, the inverter kept the school’s lights, fans, and water pump running using stored energy from its 24VDC lithium battery bank. “We didn’t miss a single class,” Ms. Dwi adds. “The kids even stayed after school to use the computers—something they’d never do before.”  Built for Tropical Conditions  Indonesia’s tropical climate—high temperatures (often exceeding 35°C) and humidity (up to 90% during the rainy season)—poses unique challenges for electronic devices. The EM3500-24L’s operating temperature range of -10°C to 50°C and 5%-95% non-condensing humidity resistance make it ideal for the village’s environment. “The installer told us this system can handle our weather better than any other they’ve used,” says Mr. Joko. “We’ve had heavy rains and scorching sun since March, and it’s never skipped a beat.”  A Ripple Effect of Change  Since the inverter’s installation, the school has become a hub for the community. In the evenings, villagers gather to charge their phones, use the school’s Wi-Fi (powered by the inverter), and attend adult literacy classes. The system’s RS485 communication interface also allows the village council to monitor energy usage remotely, helping them plan for future expansions. “Next month, we’re adding more solar panels to power the village’s health clinic,” Mr. Joko says. “This inverter isn’t just for the school—it’s for everyone.” For Siti, the impact is personal. “I want to be a doctor when I grow up,” she says, typing a report on the school’s computer. “Now, I can study at night with the lights on, and I don’t have to worry about my laptop dying. This system gives me hope.” As the day ends, the sun sets behind the hills, and the inverter switches to battery power. Inside the classroom, Siti and her friends laugh as they watch a science video—proof that reliable electricity isn’t just a luxury, but a bridge to a brighter future.

  Headline: Advanced Hybrid Solar Inverters Launch to Address Global Energy Resilience Needs   Dateline: MUNICH, Germany – October 26, 2024   A new series of high-efficiency hybrid solar inverters has entered the global market, targeting residential and commercial users in regions grappling with grid instability, extreme weather, and rising energy costs. The product line, featuring models from 3kW to 6kW nominal output, aims to bolster energy independence with industry-leading efficiency and robust backup capabilities.   Engineered for Real-World Challenges The inverters achieve a maximum photovoltaic-to-AC efficiency of 97.3% and a European weighted efficiency of 96.8%, minimizing energy loss in daily operations. Battery-to-AC conversion reaches 94.3%, optimizing stored power utilization. Designed for harsh environments, they operate at altitudes up to 4,000 meters and withstand temperatures from -25°C to 60°C, with an IP65 rating ensuring resilience against dust and moisture—critical for installations in coastal areas like Florida or industrial zones in India’s Rajasthan desert.  Key Innovations      Safety and Compliance Certified to international standards including VDE4105 (Germany), AS4777.2 (Australia), and NRS 097-2-1 (South Africa), the inverters integrate anti-islanding, surge protection, and insulation detection. These features address regulatory requirements in the EU and markets with stringent grid codes, such as Japan. Grid Flexibility: Wide voltage range (150V–300V) and dual-frequency support (50Hz/60Hz) enable compatibility with unstable grids in regions like South Africa (where load-shedding is frequent) or remote communities in the Andes. Rapid Backup: A 10ms transfer time ensures uninterrupted power during outages, supporting critical loads like medical equipment or refrigeration. Peak output surges to 10,000VA for 10 seconds, handling motor starts for well pumps or air conditioners. Scalable Storage: Supports 48V lithium-ion or lead-acid batteries with up to 135A charging/discharging current (6,600W), allowing homeowners in California fire-risk zones to stockpile energy during Public Safety Power Shutoffs. Solar Harvesting: Dual MPPT trackers with 70V–540V range maximize yield in low-light conditions (e.g., Nordic winters) or high-irradiance areas like Australia’s Outback.  Targeted Applications    Urban Homes: In Mediterranean countries like Greece, where tourism-driven energy spikes strain grids, the 6kW model powers villas while feeding surplus to the grid. Remote Businesses: Mountainous regions in Nepal or Peru benefit from high-altitude operation (4,000m) and humidity tolerance, supporting off-grid clinics or telecom stations. Disaster-Prone Areas: Fast backup functionality provides critical resilience in typhoon-affected Philippines or hurricane-battered Caribbean islands.

The Critical Juncture for Solid-State Batteries? As one of the hottest investment areas in battery technology, solid-state batteries have distinct advantages over traditional liquid batteries in terms of energy density and safety. They are widely regarded as the most promising next-generation battery technology. With the scale production of solid-state batteries, does this mean that the industry has reached a commercial breakthrough? Recently, China Science and Technology Fusion Energy has successfully scaled up production and rolled out its 628Ah and 314Ah solid-state batteries. As one of the most popular investment fields in batteries, solid-state batteries have notable advantages over traditional liquid batteries in terms of energy density and safety, garnering widespread attention within the industry. With the scale production of solid-state batteries, does this signal a commercial milestone for the industry?   Acceleration of Semi-Solid Battery Industrialization   Currently, the mainstream lithium batteries in the market use liquid electrolytes as transmission carriers. Under abnormal conditions such as overcharging or internal short circuits, the liquid electrolyte can easily heat up, decompose, and generate gas, potentially leading to battery fires or explosions. Replacing liquid electrolytes with solid electrolytes can fundamentally solve the safety issues of lithium batteries, while also meeting the demand for higher energy density and better performance. It is understood that the solid-state batteries being discussed in the industry typically refer to semi-solid batteries, quasi-solid batteries, or solid-liquid hybrid batteries with a reduced electrolyte content of 5%-15%. These retain some liquid electrolyte, making them feasible for mass production in terms of material design, manufacturing process, equipment production, and cost. "Leveraging the robust manufacturing foundation of the new energy industry chain, Chinese battery companies have made significant breakthroughs in the research and development of solid-state battery technology and industrial chain layout. With the mass production of semi-solid batteries by Chinese companies such as WeLion New Energy, Qingtao Energy, and Ganfeng Lithium, semi-solid batteries have truly achieved industrialization in an economic sense," said Yu Qingjiao, Secretary-General of the New Battery Technology Innovation Alliance of Zhongguancun, at the recent 2024 Solid-State Battery Industry Ecosystem Summit. He pointed out that the commercial application of solid-state batteries is approaching, and whoever captures the high ground of the industry first will gain the initiative in development.   Challenges in Fully Solid-State Battery Commercialization   Despite the mass production and application of semi-solid batteries, the commercialization of fully solid-state batteries still faces a series of challenges in terms of technology and cost. Replacing liquid electrolytes with solid electrolytes involves a core technical issue of material selection. The industry has explored three main solid-state battery systems: polymer, sulfide, and oxide. Polymer solid electrolytes are easy to process, compatible with both dry and wet manufacturing processes, and have the lowest mass production difficulty, but have low conductivity. European companies mostly focus on this technical route. Sulfides have the best performance but are sensitive to moisture in the air and most polar solvents, and the manufacturing of cells requires pressure from isostatic pressing equipment, leading to high costs. Chinese companies like CATL, BYD, and EVE Energy favor this technical route. Some startups opt for the oxide route. "Fully solid-state batteries represent a comprehensive innovation upgrade in materials, cell manufacturing processes, and manufacturing equipment. The industrial chain will undergo revolutionary changes," said Miao Lixiao, General Manager of Frontier Technology R&D at SVolt Energy. He noted that solid-state batteries face challenges in system design and recycling. For example, during manufacturing, liquid batteries use separators to wrap around the electrodes to prevent misalignment that could cause short circuits, and they do not require ultra-high pressure densification. However, solid-state batteries lack separators, and the stacked layers are densified under ultra-high pressure, making the edges of the electrodes prone to breaking and misalignment, making insulation on the cell sides challenging. "Solid-state batteries are like hamburgers, layered with ingredients that can spill out from the edges under pressure, leading to short circuits, while liquid batteries are like rolled pancakes, wrapped to avoid short circuits." Currently, the cost of solid-state batteries is higher than that of liquid batteries. Miao Lixiao cited that "the cost of sulfide solid electrolyte materials is extremely high, reaching 20,000 yuan per kilogram, with the potential to drop to 5,000 yuan per kilogram in the future. However, solid electrolytes account for over 20% of the cell mass, and such prices are likely unacceptable in the market." Pitao, Chairman of Hunan Zhongke Xingcheng Graphite Co., Ltd., pointed out, "Every company has its own technical characteristics. Due to the uncertainty of technical directions, the upstream industrial chain is in a wait-and-see state. Solid-state batteries need a relatively determined direction for upstream and downstream to configure products accordingly, avoiding greater sunk costs in capital investment."   Achieving 1+1>2 Through Composite Material Design   Due to unclear technical routes and cost reduction spaces, companies in the industry are choosing to gradually transition from semi-solid to fully solid-state. "There are differences in the fully solid-state battery route, and differentiated competition will promote the expansion of solid-state battery applications," said Xu Hangyu, Director of Scientific Research and Development at WeLion New Energy. He believes that currently, a single solid electrolyte material cannot meet the needs of fully solid-state batteries. Combining liquid and solid electrolytes is one solution, compensating for the shortcomings of single electrolyte materials while being compatible with most traditional liquid lithium battery processes and equipment, reducing costs. Combining the advantages of oxide and polymer solid electrolytes, WeLion New Energy has industrialized mixed solid-liquid batteries, with products used in small power, new energy vehicles, and energy storage fields. "Each type of material has its own advantages and disadvantages. Through composite material design, 1+1>2 can be achieved," said an industry insider, who also believes that composite solid-state batteries are an effective way to achieve large-scale production. "Solid-state batteries cannot be made into a work of art, with products being very expensive, several times or even ten times more than liquid batteries, which would never be feasible for vehicle applications." Su Min, Director of the Cell Materials R&D Department at Wanxiang 123 Co., Ltd., believes that whether semi-solid or fully solid-state, there is an optimal energy density. There is no single best technology solution; all are technical means to address safety risks under high specific energy needs. Overcoming the technical and industrialization issues of fully solid-state batteries requires the collective efforts of the entire industry.

The real estate industry is undergoing a significant transformation as sustainability and energy efficiency become key priorities for developers, homeowners, and investors. One of the most notable trends in modern construction is the integration of solar inverters into new residential and commercial projects. As a leading inverter manufacturer, Senergy understands the growing demand for reliable, high-performance energy solutions in real estate. This article explores why more developers are incorporating inverters into new builds, the benefits they offer, and how partnering with a trusted supplier like Senergy can enhance project value and buyer appeal. The Shift Toward Energy-Efficient Housing   1. Rising Energy Costs and Demand for Sustainability With electricity prices soaring globally, homeowners and businesses are seeking ways to reduce energy expenses. Solar power systems, supported by high-efficiency inverters, provide a cost-effective solution by converting solar energy into usable electricity. Real estate developers who integrate pre-installed solar inverters into their projects gain a competitive edge by offering:     Lower utility bills for homeowners Increased property value due to green energy features Compliance with stricter environmental regulations 2. Government Incentives and Green Building Certifications Many governments now offer tax credits, rebates, and subsidies for energy-efficient homes. Developers who include solar inverters in their projects can:     Qualify for LEED (Leadership in Energy and Environmental Design) certification Access financial incentives that reduce construction costs Attract eco-conscious buyers willing to pay a premium for sustainable homes Why Inverters Are Becoming a Standard in New Builds   1. Seamless Integration with Solar Power Systems Modern inverters, such as Senergy’s residential inverters, are designed for easy installation in new constructions. Key advantages include: Compact and lightweight designs that fit seamlessly into building plans Smart grid compatibility for future energy storage expansion High conversion efficiency (up to 98.5%) to maximize energy savings These capabilities make them a must-have for smart homes, increasing buyer interest. 2. Enhanced Home Automation and Smart Energy Management Today’s inverters are not just power converters—they are intelligent energy hubs. Features like:   Wi-Fi/Bluetooth monitoring for real-time energy tracking Battery storage compatibility for off-grid resilience 3. Future-Proofing Properties Against Energy Market Volatility Energy prices are unpredictable, but solar-equipped homes provide long-term stability. By incorporating high-quality inverters, developers ensure:     Energy independence for homeowners Protection against rising electricity rates Higher resale value as green homes become the norm Peak shaving and load management to optimize electricity use