5V Solar Charge Controller JEITA Li-ion Battery Charger

- Smart Solar Charge Controller with Protection: Built-in intelligent solar charge controller with overcharge, over-discharge, overcurrent and reverse polarity protection to ensure safe lithium battery charging - Dual Input Charging (Solar/USB-C): Supports charging via 5V solar panels (4.5-6V) or USB Type-C. Automatically prioritizes USB power when both are connected, with a max charging current of 950mA. Efficient solar power management circuit improves charging efficiency and supports continuous charge-discharge operation for outdoor solar systems - Stable 5V/3.3V Dual Output: Provides regulated 5V (1A) and 3.3V (1.5A) outputs via pin headers and USB-A port, suitable for powering Arduino, Raspberry Pi, STM32, and other 5V/3.3V devices - Comprehensive Protection Circuits: Includes overcharge, over-discharge, overcurrent, and reverse polarity protection, along with LED alarms for faulty connections, ensuring system safety - Flexible Battery Compatibility & Control Pins: Works with 3.7V Li-ion batteries with or without NTC. Exposes functional pins (CHRG, DONE, V BAT, 5V EN, 3V3 EN) for easy integration and control - Versatile Applications: Suitable for solar lighting systems, DIY power banks, remote monitoring devices, IoT projects, and sustainable energy applications requiring reliable solar power management

Product description

Product Overview

Specifications

Resource Overview

Solar Energy Manager C is a compact module for solar power management. It works with 4.5V-6V solar panels (<10W) and USB to charge 3.7V 18650 batteries. It offers stable 5V/3.3V outputs, JEITA-compliant temperature monitoring, and full protection circuits to prevent overcharge/discharge, ensuring battery safety and longevity. Ideal for solar projects, low-power IoT, and environmental monitoring.

Features

(1)-DC-044 solar charging jack: A 5V solar panel or adapter can be connected through this power jack;

(2)-3.5mm solar charging terminal: A 5V solar panel or adapter can be connected through this terminal;

(3)-USB C charging port: The battery is charged through this USB connector (if a solar panel is connected at the same time, the charging from the solar panel will be disconnected);

(4)-Power output pin header (2.54mm pitch): It can provide 5V and 3.3V outputs externally, and together with the USB A connector, they can provide a maximum power of 5W externally.

(5)-USB A output port: It can output a maximum power of 5V/1A through this port (together with the power output pin header); (6)-Battery voltage indicator;

(7)-Pins for battery charge-discharge status, battery level, and power output control are led out (pin headers are un-soldered), including GND, charging status pins CHRG and DONE, battery voltage (already through resistor voltage division), 5V output enable, 3.3V output enable;

(8)-NTC function setting jumper cap: Short circuit indicates disabling the NTC detection function, and open circuit indicates enabling the NTC detection function, in which case the connected battery is required to have an NTC resistor.Battery Charge/Discharge Status and Voltage Pins (header not soldered).

(9)-Status indicators: CHRG->Battery is charging, DONE->Battery is fully charged, SAlarm->Solar panel input reversed, BAlarm->Battery connection polarity reversed;

(10)-PH2.0 battery connector without NTC: When connecting the battery here, please short-circuit NTC_DIS (⑧ in Figure 4-1);

(11)-3.5mm battery terminal: When it is necessary to connect a battery with an NTC resistor, please connect the NTC pin to the middle NTC pin and open the NTC_DIS pin header. If the battery does not have the NTC function, just connect the battery with correct polarity and short-circuit NTC_DIS; (12)-Power switch; (13)-PH2.0 battery input connector with NTC;