Shenzhen First Tech Co., Ltd.

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  

Understanding DC-Coupled vs. AC-Coupled Solar Systems   If you’re planning to install a solar PV system for your home or business, it’s essential to understand the difference between DC-coupled and AC-coupled configurations. Solar panels generate direct current (DC) electricity from sunlight, but our homes and businesses typically run on alternating current (AC). The terms DC-coupled and AC-coupled refer to how your solar panels, inverters, and batteries are interconnected within the system.   DC-coupled PV systems are generally more energy-efficient than their AC-coupled counterparts. This improved efficiency means more of the solar energy you generate is actually usable, resulting in better overall system performance. Here’s why DC-coupled systems often have the edge:   1. DC-Coupled PV Systems Are More Efficient for Battery Storage   As more homeowners add battery storage to their solar energy systems to increase self-sufficiency and protect against outages, DC-coupled setups are becoming the preferred choice. Here’s why: solar panels generate DC electricity, and batteries store energy in DC as well. In a DC-coupled system, this direct match allows energy to flow from the panels to the batteries with just a single conversion—DC to AC—when it’s time to power your home. In contrast, AC-coupled systems involve multiple conversions. Solar energy is first converted from DC to AC for household use, then back to DC to be stored in the battery, and once again to AC when drawn from the battery for appliances. Each conversion introduces energy losses, reducing overall efficiency. Think of it like exchanging money for a big purchase. If you had to convert your currency multiple times before making the payment, you’d lose value with every transaction. That’s exactly what happens with an AC-coupled system. DC-coupled systems avoid this inefficiency by streamlining energy flow and requiring only one inverter. This not only simplifies installation but also reduces equipment costs and improves overall system performance. 2. DC-Coupled Inverters Are Better for Oversizing   Oversizing occurs when the solar energy generated exceeds the capacity of the system’s inverter. This allows for additional solar panels to be installed without upgrading the inverter, increasing overall energy production. The surplus electricity that isn’t used by your home can then be redirected to charge a home battery, power an EV charger, heat water, and more. With an AC-coupled system, some of this additional “oversized” energy is simply lost.   DC-coupled inverters can therefore increase your savings since they allow for more oversizing and more excess energy storage. 3. Harnessing DC-Coupled Solar for Smart Energy Devices As homes become smarter and energy needs grow, many homeowners are noticing significant increases in their electricity bills. For instance, did you know that charging an electric vehicle can raise your energy consumption by 50% or more? With a DC-coupled PV system, homeowners can power smart energy devices and charge their EV using solar energy, significantly cutting down on electricity costs.  

   Introduction to household energy storage system    The structure of household energy storage system includes: photovoltaic modules, energy storage batteries, energy storage inverters, grid-connected and metering equipment, public power grid, household loads and important loads. PV energy first meets the power consumption of important loads, then charges the battery, and finally flows to household loads, and the excess flows to the power grid.    Working principle   In the morning , when there is sufficient sunlight, PV energy will first supply the load, and the household load will consume the photovoltaic power generation to the maximum extent, and the remaining power will be stored by the battery; when there is insufficient sunlight, the battery will supplement the power to the load.    In the afternoon , after meeting the consumption of household loads and the battery is full, the remaining power will be fed to the power grid.    In the absence of sunlight  , the battery is converted into AC power through the inverter for use by the load.   When the battery cannot meet the power demand of the load, the power grid will supplement the power for the load.    Product performance     1. Intelligent and efficient    •Store surplus electricity and increase the self-use rate of photovoltaic power generation •Two-way energy storage design, PV and AC power can charge the battery •Flexible configuration of lead-acid batteries and lithium batteries •Charging control and inverter integrated design •Compatible with off-grid and grid-connected modes    2. Flexible operation    •Wi-Fi/Ethernet/GPRS/RS485 multiple communication modes are available •Peak and valley time periods can be set, automatically shaving peaks and filling valleys •Local/remote control through computers and mobile phones •Capacitive sensing button operation and LCD display, human-computer interaction is more convenient and stable    3. Safe and reliable    •IP65 high protection level, suitable for outdoor installation •3-stage/2-stage charging control to ensure battery life •Natural heat dissipation to reduce single-point failure rate