Solar Power Management Module for 6V-24V Solar Panel

This solar power management module is designed for 6V-24V solar panels. It can charge a 3.7V rechargeable 14500 Lithium-ion battery via a solar panel or USB connection and provides 5V 1A regulated output.

The module features MPPT (Maximum Power Point Tracking) function and multi-protection circuits, making it able to keep working with high-efficiency, stability and safety.

The module is suited for solar-powered, low-power IoT and other environmental protection projects.

Warning: Only use rechargeable 14500 lithium-ion batteries! (battery not included)

Features

• Supports MPPT (Maximum Power Point Tracking) function, maximizing the efficiency of the solar panel
• Supports solar panel / USB connection battery charging
• For 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 efficiency
• Two 5V output interfaces: pin headers and USB port
• An onboard high capacity aluminium electrolytic capacitor and SMD ceramic capacitor, reducing the ripple for stable performance
• 14500 battery holder and PH2.0 battery connector, for connecting different kinds of 3.7V rechargeable lithium-ion batteries
• Several LED indicators, for monitoring the status of solar panel and battery
• Multi protection circuits: over charge / over discharge / reverse protection / over heat / over current

Resources

• Product Wiki and user guide
• Manual

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: <2mA
• Operating temperature: -40℃~85℃
• Dimension: 65.2mm × 56.2mm × 22.9mm

What's on board?

1. Solar panel charging input: charged by solar panel, DC-002 jack or screw terminal
2. USB charging input: charged by USB connection, connect a 5V power adapter through the Micro USB port
3. 5V/1A power output: provides regulated 5V/1A output, USB port or 2.54mm pinheader
4. Battery interfaces: for connecting 3.7V rechargeable lithium-ion, PH2.0 connector or 14500 battery holder
5. CS8501: USB power management chip, for USB charging and 5V/1A boost output
6. CN3791: solar power management chip, for solar panel charging and buck input
7. Lithium-ion battery protection chip: over charge / over-discharge protection
8. Battery switch
9. MPPTSET switch (bottom side): supported level: 6V/9V/12V/18V/24V (select the level closed to input level to improve charging efficiency)
10. BOOT key
11. Battery capacity indicators
12. USB charging indicators: USB Charge: on when USB charging. USB Done: on when the battery is full charged by USB
13. Solar panel charging indicators: Solar Charge: on when solar panel charging. Solar Done: on when the battery is fully charged by solar panel. Solar Warning: on when solar panel reverse connection
14. Battery warning: on when battery reverse connection
15. Power output indicator: 5V/1A output