Solar Power Management Board

This solar power management module is designed for 6V~24V solar panel. It cancharge the 3.7V Li battery through solar panel or USB connection, and provides5V/1A regulated output.

The module features MPPT (Maximum Power Point Tracking) function and multiprotection circuits, therefore, it is able to keep working with high-efficiency, stability, and safety. It is suited for solar powered, low-powerIoT, and other environmental protection projects.

Quick Spec

• Solar panel input voltage (SOLAR IN): 6V~24V
• Micro USB input voltage (USB IN): 5V
• Pin header / 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℃

Dimensions

Board Layout

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 pin header
4. Battery interfaces: for connecting 3.7V Li battery, 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. Li battery protection chip: Li battery 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 full 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

Example Application

Resources

• Product Page
• User Manual
• Schematic

Shipping List

• 1 X Solar Power Management Board

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