Supports MPPT (Maximum Power Point Tracking) function, maximizing the efficiency of the solar panel,Multi protection circuits: over charge / over discharge / reverse protection / over heat / over current, stable and safe to useSupports solar panel / USB connection battery chargingFor 6V~24V solar panel, DC-002 jack input or screw terminal input,Onboard MPPT SET switch, select the level closed to input level to improve charging efficiencyTwo 5V output interfaces: pinheaders and USB port,Onboard high capacity aluminum electrolytic capacitor and SMD ceramic capacitor, reducing the ripple, stable performance14500 battery holder and PH2.0 battery connector, for connecting multi kinds of 3.7V Li battery,Several LED indicators, for monitoring the status of solar panel and batteryOverviewThis solar power management module is designed for 6V~24V solar panel. It can charge the 3.7V Li battery through solar panel or USB connection, and provides 5V/1A regulated output.The module features MPPT (Maximum Power Point Tracking) function and multi protection circuits, therefore, it is able to keep working with high-efficiency, stability, and safety. It is suited for solar powered, low-power IoT, and other environmental protection projects.Solar panel input voltage (SOLAR IN): 6V~24V-USB input voltage (USB IN): 5VPinheader / USB output (USB OUT): 5V 1ACharging cutoff voltage: 4.2V1%Over discharging protection voltage: 2.9V1%Solar panel charge efficiency:: ~78%USB charge efficiency:: ~82%3.7V battery boost output efficiency: ~86%Max quiescent current: less than 2mAOperating temperature: -40~85Dimension: 65.2mm x 56.2mm x 22.9mmNote: the 14500 battery is NOT included.color:BlueMaterial:PCBPackage Contents:1 x Solar Power ManagerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.