General description This solar power management module is designed for 6V~24V solar panels. It can charge a 3.7V Li battery through solar panel or USB connection and provides a 5V/1A regulated output. The module features MPPT (Maximum Power Point Tracking) function and multi-protection circuits, ensuring high efficiency, stability, and safety for solar-powered, low-power IoT, and other environmental protection projects. Technical specifications Solar panel input voltage (SOLAR IN): 6V~24V Micro-USB input voltage (USB IN): 5V Pinheader / USB output (USB OUT): 5V 1A Charging cutoff voltage: 4.2V±1% Over discharging protection voltage: 2.9V±1% Solar panel charge efficiency: ~78% USB charge efficiency: ~82% 3.7V battery boost output efficiency: ~86% Max quiescent current: less than 2mA Operating temperature: -40℃~85℃ Dimension: 65.2mm x 56.2mm x 22.9mm Color: Blue Material: PCB Compatibility and accessories Compatible with 6V~24V solar panels Includes a 14500 battery holder and PH2.0