Uses an industrialgrade main control chip for reliable, durable operation. Largescreen LCD display provides clear, realtime information: charging and discharging current accumulated power generation and discharge system temperature light control with delay function adjustable charging and discharging parameters poweroff memory to resume settings after shutdown Dual USB output ports with a maximum current up to 2.5 A, enabling simultaneous charging of multiple devices. Complete threestage charging management for safe, efficient, and optimized battery charging. Use scenarios Offgrid camping or field work: monitor charging/discharging activity and energy flow on the LCD while powering essential devices and tools from a stored energy source. Home backup power: maintain continuity for critical devices during outages with reliable power management and memory of last settings. Mobile work site or travel: charge phones, tablets, and small tools via USB ports while preserving energy through staged charging control and clear ondevice readouts.