1. Industry Background: Why Do Critical Scenarios Urgently Need High-Reliability UPS? With the rapid development of digitalization and AI technology, critical scenarios such as government affairs systems, financial transaction platforms, medical equipment, and data centers have put forward unprecedented high requirements for the "continuity, stability, and intelligence" of power supply. According to industry statistics, a single power outage lasting more than 10 minutes may cause financial institutions to lose over one million yuan, lead to the risk of equipment shutdown in medical systems, and even result in data loss and business interruption in data centers. Traditional UPS has pain points such as "difficult expansion, long maintenance downtime, and low energy efficiency": the fixed-power design requires the overall replacement of equipment when business grows in the later stage; maintenance requires power outage; and the energy efficiency loss during long-term operation can reach more than 10%. Against this background, modular UPS has become the core choice to solve the power supply problems in critical scenarios due to its advantages of "flexible expansion, hot-swap maintenance, and high energy efficiency" — and the SY-M series modular UPS of Hefei Shuyi Digital Power is a representative product in this field. 2. Shuyi Technology: A Globally Recognized Expert in Digital Energy with 10 Years of Experience As an enterprise based on core technologies of power electronics and integrated with innovative digital technologies, Shuyi Technology has always focused on the R&D of solutions in the fields of data centers, high-end power supply, and clean energy since its establishment. After more than 10 years of development, its products and solutions have been exported to 86 countries, with branches and offices in more than 50 countries and regions around the world. It has won wide recognition from global customers for its "high stability" and "high-quality after-sales service". Shuyi Technology's core competitiveness stems from its strong R&D and testing capabilities: R&D System: It has industry-leading power electronics R&D centers, testing centers, and laboratories, including electromagnetic compatibility laboratories, enthalpy difference laboratories, and environmental reliability laboratories, ensuring full-process control from product design to implementation. Certification Guarantee: It has passed ISO9001 quality management system certification and ISO14001 environmental management system certification. Its products comply with international standards such as CE, IEC, and UL, and can meet compliance requirements in different regions around the world. Corporate Mission: With "digital energy technology innovation" as the core, it is committed to building a green and intelligent energy future and providing reliable digital energy infrastructure support for global customers. 3. SY-M Series Modular UPS: Core Advantages and Full-Scenario Adaptation Shuyi Technology's SY-M series modular UPS covers the full power range of 20kVA-1600kVA, adopts the "three-in three-out, dual-conversion online operation" mode, and can provide flexible product choices according to the power requirements and installation environments of different scenarios. Its core advantages can be summarized into four dimensions: "reliability, flexibility, intelligence, and efficiency". (1) High Reliability: Ensuring Zero Power Outage Risk in Critical Scenarios N+X Redundant Design: It supports parallel operation of multiple modules. Even if a single module fails, the remaining modules can automatically take over the load to avoid power supply interruption, which is especially suitable for "zero-tolerance" scenarios such as finance and medical care. Core Component Upgrade: It adopts integrated packaged IGBT modules, which have fast switching speed, low loss, and strong impact resistance, and can cope with grid voltage fluctuations and load mutations. Wide Input Voltage Range: The input voltage supports 304~485VAC (full load). Even if the grid voltage fluctuates greatly (such as in remote areas or industrial scenarios), it can still output stably, reducing frequent charging and discharging of the battery and prolonging the battery life. Battery Cold Start Function: In emergency situations without commercial power, the UPS can be started directly through the battery to quickly restore power supply, which is suitable for emergency scenarios of sudden power outages. (2) Flexibility: On-Demand Expansion to Adapt to Different Installation Environments Full Power Range Coverage: From 20kVA small computer rooms to 1600kVA large data centers, the SY-M series can meet the power requirements of different scenarios and avoid resource waste caused by "using a large device for a small load". Modular Hot-Swap: The power modules and static bypass monitoring modules support hot-swap. Maintenance does not require shutdown, and the replacement time of a single module is only 5 minutes, which greatly reduces the risk of business interruption. Multiple Installation Methods: It provides multiple installation methods such as rack-mounted (compatible with 19-inch standard cabinets), tower-type, and container-type, adapting to different site conditions such as data centers, base stations, and industrial workshops. Flexible Parallel Expansion: It supports direct parallel operation of multiple UPSs. When the business grows in the later stage, the power can be increased only by adding modules without replacing the overall equipment, reducing the expansion cost. (3) Intelligence: Remote Management and Precise Operation and Maintenance Large-Screen Touch Interaction: Equipped with a 5.7-inch/10.4-inch color LCD touch screen, it supports more than 10 languages including Chinese, English, Russian, and French. It can display real-time data such as load rate, battery status, and fault information, with intuitive and convenient operation. Powerful Remote Management: It is equipped with RS232 and RS485 interfaces as standard, and an SNMP network communication card is optional. It supports remote monitoring, parameter setting, and fault alarm (such as SMS alarm and email alarm), so that operation and maintenance personnel can grasp the equipment status without being on-site. Intelligent Battery Management: It adopts the "three-stage charging" technology to avoid over-charging and over-discharging of the battery, prolonging the battery life (the life of lead-acid batteries can be extended by more than 20%). At the same time, it supports battery status self-test and fault early warning. System Self-Diagnosis: It has built-in fault recording and historical data storage functions, which can automatically identify problems such as module faults and power grid abnormalities, and generate diagnosis reports, reducing the difficulty of operation and maintenance. (4) High Efficiency: Green and Energy-Saving to Reduce Long-Term Operating Costs Ultra-High Operating Efficiency: The efficiency is ≥95% in normal mode and up to 99% in economic mode. Compared with traditional UPS, it can reduce a large amount of power loss every year, which is especially suitable for scenarios such as data centers that "operate 24 hours a day". Intelligent Sleep Mode: It automatically adjusts the number of operating modules according to the load rate. When the load is low, some modules sleep to reduce useless power consumption. For example, when the load rate is less than 40%, 50% of the modules can be turned off, and the energy efficiency is increased by 10%-15%. Low Harmonic Pollution: The input power factor is >0.99, and the input harmonic current THDi is <3%, which avoids interference to the power grid, meets the environmental protection requirements of green data centers, and reduces electromagnetic interference to other equipment. (5) Full-Scenario Adaptation: Covering More Than 10 Key Industries With its high adaptability, the SY-M series modular UPS has been widely used in: Government and Finance: Government affairs systems, bank transaction platforms, and securities servers to ensure data security and business continuity. Medical Industry: ICU equipment, nuclear magnetic resonance, and testing instruments to avoid medical accidents caused by power outages. Communication and Transportation: Base stations, rail transit signal systems, and airport dispatching centers to cope with high loads and frequent voltage fluctuations. Industry and Energy: Industrial automation equipment, photovoltaic energy storage systems, and power dispatching centers to adapt to harsh industrial environments. Education and Radio and Television: University data centers and TV station broadcasting systems to support long-term stable operation. 4. Typical Cases: How Does the SY-M Series Solve Pain Points in Actual Scenarios? Case 1: Transformation of a Provincial People's Hospital Data Center Pain Points: The original UPS was a traditional tower-type model with a power of 30kVA. With the increase of medical equipment (such as electronic medical record systems and teleconsultation equipment), the load rate reached 90%, making expansion difficult; and maintenance required shutdown, affecting the transmission of medical data.Solution: Adopt the SY-M series 60kVA modular UPS, equipped with 3 20kVA modules (N+1 redundancy), supporting hot-swap maintenance.Effects: The load rate was reduced to 50%, and modules can be added on demand in the later stage; maintenance does not require shutdown, ensuring zero interruption of medical data transmission, and the battery life was extended by 1.5 years. Case 2: Asian Logistics Data Center of a Multinational E-Commerce Company Pain Points: The data center is located in a seismic-prone area, requiring power supply equipment with high seismic resistance; and the load fluctuates greatly during peak business periods (such as Double 11), which is difficult for traditional UPS to cope with.Solution: Adopt the SY-M series 400kVA modular UPS, equipped with 8 50kVA modules, and install anti-seismic components; enable the intelligent sleep mode to automatically adjust the number of modules according to the load.Effects: The seismic grade reaches IP20 standard, which can resist earthquakes below magnitude 6; the energy efficiency remains above 96% during peak periods, saving about 200,000 yuan in electricity bills every year. 5. How to Choose the Suitable SY-M Series Product? According to the three dimensions of "power demand, installation environment, and scenario priority", you can quickly match the suitable model: Scenario Type Power Requirement Recommended Model Core Considerations Small computer rooms (such as enterprise server rooms, university laboratories) 20kVA-60kVA SY-M 20-60kVA Rack-mounted Save space and support later expansion Medium-sized data centers (such as municipal government clouds, hospital data centers) 120kVA-300kVA SY-M 120-300kVA Modular N+X redundancy to ensure zero interruption Large data centers/industrial scenarios 400kVA-1600kVA SY-M 400-1600kVA Container-type High power density to adapt to harsh environments Critical scenarios such as medical/finance Any power range Models with isolation transformers (such as SY-M 20-60kVA TX) Reduce zero-ground voltage and improve power supply quality 6. Conclusion: Choose Shuyi SY-M to Build a Reliable Energy Guarantee In today's era of accelerated digital transformation, power supply has become the "lifeline" for the continuity of enterprise business. The SY-M series modular UPS of Shuyi Technology takes "high reliability, high flexibility, high intelligence, and high efficiency" as the core, which not only solves the pain points of traditional UPS but also provides customized solutions according to the needs of different scenarios. Whether it is the expansion demand of small computer rooms or the high redundancy requirement of large data centers, Shuyi Technology can provide customers with full-process support from product selection, installation and commissioning to later operation and maintenance relying on its 10 years of technical accumulation and global service network. For more product details or customized solutions, you can contact Shuyi Technology through the following methods: Official Website: www.shuyidigitalpower.com Email: admin@shuyidigitalpower.com WA/Tele: +86 18155158620

Introduction In today’s digitally driven world, uninterrupted power supply (UPS) systems are indispensable for safeguarding IT infrastructure, particularly in distributed and edge computing environments. Power disruptions can lead to data loss, equipment damage, and operational downtime. Selecting the right UPS for your needs is crucial, as it directly impacts system reliability and cost-effectiveness. This guide explores the three primary UPS technologies: Online Double Conversion, Line-Interactive, and Offline (Standby/Battery Backup) systems. We will compare their advantages, working principles, and suitable applications to help you make an informed decision. 2. Online Double Conversion UPS 2.1 Working Principle Online Double Conversion UPS operates by converting incoming AC power to DC and then back to AC, ensuring consistent and clean power delivery. This AC-DC-AC conversion process isolates connected devices from all power irregularities. Key Components: Rectifier: Converts AC to DC for battery charging. Battery: Stores energy for uninterrupted power during outages. Inverter: Converts DC back to AC for output. Bypass Switch: Ensures power delivery during UPS maintenance. AC-DC-AC flow in Online UPS 2.2 Advantages Zero Transfer Time: Seamlessly switches to battery power without delay. Power Conditioning: Eliminates voltage sags, surges, and harmonics. Frequency Regulation: Essential for environments using backup generators. Stable Output: Consistently delivers a clean and precise sine wave, ensuring sensitive equipment operates without disruption. 2.3 Typical Applications Data Centers: Protects servers and storage systems from even minor power fluctuations. Healthcare Facilities: Supports life-critical equipment such as ventilators and imaging systems. Industrial Automation: Ensures consistent operation of control systems in manufacturing. 2.4 Comparison Table with Key Metrics Metric Online Double Conversion UPS Transfer Time 0 ms Output Waveform Pure Sine Wave Voltage Regulation Excellent Use Cases Critical Infrastructure Cost High 2.5 Emerging Trends AI-Driven Monitoring: Predictive maintenance to reduce downtime. Modular Designs: Scalability for growing infrastructure. Energy Efficiency Improvements: Advanced designs aimed at reducing operational costs and carbon footprints. 3. Line-Interactive UPS 3.1 Working Principle Line-Interactive UPS combines power conditioning with battery backup. It uses an automatic voltage regulator (AVR) to handle minor voltage fluctuations without switching to the battery. The inverter operates bi-directionally, charging the battery during normal conditions and supplying power during outages. Additional Features: Voltage Boost and Buck: Automatically adjusts under-voltages and over-voltages without depleting battery power. Surge Protection: Shields connected devices from transient spikes. [Insert Image: Illustration of AVR functionality in Line-Interactive UPS] 3.2 Advantages Cost-Effective Protection: Balances performance and affordability. Voltage Regulation: Handles power sags and surges effectively. Battery Efficiency: Reduces unnecessary battery usage. Low Operating Costs: Suitable for environments where power fluctuations are occasional rather than frequent. 3.3 Typical Applications Small and Medium-Sized Businesses (SMBs): Supports critical office equipment like servers and storage devices. Retail Systems: Ensures uninterrupted operations for point-of-sale terminals and network routers. Branch Offices: Provides essential backup for remote IT systems. 3.4 Comparison Table with Key Metrics Metric Line-Interactive UPS Transfer Time 4-6 ms Output Waveform Modified Sine Wave Voltage Regulation Moderate Use Cases SMB Equipment Cost Moderate 4. Offline UPS (Standby/Battery Backup) 4.1 Working Principle Offline UPS delivers utility power directly to connected devices during normal operation. When a power failure occurs, the system switches to battery backup, typically within 6-8 milliseconds. Unlike other types, offline UPS primarily acts as a last line of defense. 4.2 Advantages Low Cost: Ideal for budget-conscious users. Basic Surge Protection: Shields against voltage spikes. Lightweight and Compact: Easy to install and maintain, especially for home or small office setups. 4.3 Limitations Limited Power Conditioning: Cannot handle significant sags or surges. Switching Time: The brief delay may not suit critical systems. Short Battery Life: Frequent switching can lead to faster battery wear. 4.4 Typical Applications Home Offices: Protects PCs, monitors, and small printers. Personal Electronics: Ensures continued operation of routers, modems, and gaming consoles. Low-Criticality Environments: Provides just enough time for saving data and safely shutting down devices. 4.5 Comparison Table with Key Metrics Metric Offline UPS Transfer Time 6-8 ms Output Waveform Stepped Sine Wave Voltage Regulation Limited Use Cases Home Equipment Cost Low 5. UPS Selection Guide 5.1 Key Factors Load Requirements: Determine the power capacity (measured in VA or Watts). Calculate backup runtime needed during outages. Environmental Conditions: Consider installation space, temperature, and humidity. Budget: Balance upfront costs with long-term operational efficiency. 5.2 Comprehensive Comparison Table Feature Offline UPS Line-Interactive UPS Online Double Conversion UPS Cost Low Moderate High Protection Level Basic Intermediate Comprehensive Transfer Time 6-8 ms 4-6 ms 0 ms Output Waveform Stepped Sine Modified Sine Wave Pure Sine Wave Voltage Regulation Limited Moderate Excellent Use Cases Home PCs SMB Servers Data Centers 6. Maintenance and Troubleshooting 6.1 Common Issues Battery Degradation: Regularly check and replace aged batteries. Overloading: Avoid exceeding UPS capacity to ensure optimal performance. Switching Delays: Monitor transfer times and address anomalies. 6.2 Maintenance Tips Clean UPS components to prevent dust buildup. Conduct bi-annual load tests. Update firmware for smart UPS models. 7. Future Trends in UPS Technology 7.1 Green Energy Integration Solar-powered UPS systems are gaining traction for sustainability. 7.2 AI and IoT in UPS AI-driven insights for predictive analytics. IoT-enabled UPS for real-time monitoring and remote management. 7.3 Modular and Scalable Systems Modular UPS designs simplify upgrades and reduce maintenance costs. 8. Conclusion UPS systems are vital for ensuring uninterrupted power in various environments, from home offices to mission-critical data centers. By understanding the differences between Online, Line-Interactive, and Offline UPS technologies, you can select the best solution tailored to your needs. Embrace advancements like AI and green energy to future-proof your infrastructure. Appendices A. Glossary AVR (Automatic Voltage Regulation): A feature that adjusts voltage to acceptable levels. VA (Volt-Ampere): A unit of measurement for UPS capacity. B. References International Electrotechnical Commission (IEC) Standards for UPS. Industry reports on UPS adoption trends.