The portable multifunctional UPS system is designed based on solar charging, storage, and discharge control management. It is equipped with a high capacity and high-performance lithium battery, manufactured using current advanced lithium battery technology, with multiple safety protections and strong output energy. It provides two modes of AC voltage output and DC voltage output, making it convenient for different electrical appliances to supply power. It is suitable for household power supply, emergency power supply, and supports danger rescue Support areas lacking electricity, provide camping or travel power supply, and other usage modes. The portable lithium-ion energy storage system has high strength, beautiful appearance, and is equipped with pull rod pulleys, making transportation more convenient; Using lithium batteries with good resistance to high and low temperatures and high temperatures ensures that the system can operate normally in environments ranging from -20 ℃ to+60 ℃; And the product is equipped with standard interfaces, with AC/DC input and AC/DC output functions respectively; In addition, the DC output of the product has anti reverse connection function, ensuring safe and reliable use; It also has functions such as overcharging, discharging, overcurrent, short circuit, and temperature protection1. Using improved engineering plastics as raw materials, the product has good weather resistance and can work in the ambient temperature range of -40 ℃ to 90 ℃. 2. The box can resist ultraviolet radiation, strong impact, abrasion, aging and flame retardant; 3. Unique manual air valve design solves the usage problems caused by air pressure difference, making it more durable and waterproof; 4. The internal humanized detail design is convenient for the safe use of instruments, equipment, etc; 5. Adopting high-quality sealing materials, the product has a protection level of IP67; 6. Ergonomic handle, designed with adhesive wrap, provides a comfortable feel and reduces fatigue; 7. The standard configuration is egg pit sponge combined with cutting sponge, which enhances protection and is easy to use..