On the anniversary of the victory of the Anti Japanese War, China showcased its military strength through a military parade, demonstrating its national defense technology capabilities. At the same time, China's industrial strength is reshaping the global landscape, becoming a leader in the field of new energy, with photovoltaic modules, lithium batteries, and other production capacity accounting for over 60% of the world's total. Military security ensures sovereignty, while industry and new energy ensure long-term stability. Together, they constitute China's comprehensive strength and contribute to the global transition to clean energy.

The Battery Management System (BMS) is referred to as the core of an energy storage system. BMS has four key functions: monitoring and measurement, safety protection, cell balancing, state estimation, and data communication, which can ensure battery safety, improve performance, and extend lifespan. It is crucial for the reliability and economy of energy storage systems, and DEMUDA's BMS products have been applied to large-scale energy storage projects worldwide, providing support for the transition to clean energy.

The battery energy storage system (BESS), with its core components including battery packs, power conversion systems (PCS), and battery management systems (BMS), operates through a two-step workflow of "charging and energy storage-discharging and energy release." Combined with intelligent control systems, it enables the spatiotemporal transfer of electrical energy. The system is suitable for multiple scenarios such as grid-level and user-side applications, offering peak-valley arbitrage and frequency/peak regulation. Currently facing technical challenges like battery performance and PCS efficiency, it remains a key technology driving the development of clean energy.

The article focuses on the lifespan of lithium batteries in photovoltaic and energy storage systems, noting that their typical lifespan ranges from 10 to 15 years or 3,000 to 6,000 cycles, far exceeding that of traditional lead-acid batteries. It analyzes key influencing factors such as battery chemistry and depth of discharge, examines lifespan performance across different application scenarios, and provides methods to extend lifespan by avoiding deep discharge and controlling temperature.

The article analyzes the core differences between the key parameters KW (active power, actual work done) and KVA (apparent power, including both active and reactive power) of inverters, which are correlated through power factor (PF=KW/KVA). The selection logic is different in different load scenarios: pure resistance loads focus on KW, while industrial inductive loads, off grid systems, and other systems focus on KVA. Accurately distinguishing can avoid selection errors, ensure system stability and cost control.