Industrialgrade main control chip for reliable and durable operation. Largescreen LCD display provides ataglance information including: charging and discharging current accumulated power generation and discharge temperature light control with delay adjustable charging and discharging parameters poweroff memory Dual USB outputs with a maximum current of up to 2.5 A. Complete threestage charging management for efficient and safe battery handling. Use scenarios Solar energy storage and home backup: monitor energy flow, manage charging and discharging, and resume last state after power interruption thanks to poweroff memory. Outdoor work or camping: charge phones, tablets, and accessories via USB while managing battery performance. Small workshop or commercial setting: precise charging management for battery packs and energy storage, helping optimize use and reliability.