4-Pin Waterproof Panel Mount Connector for Electrical Supplies M12FP4 Socket

Item Type: Solar Charging Board Material: PCB, Aluminum Alloy Uses: Compatible with 1W–100W solar panels operating at 8V–28V input; suitable for charging 9V, 12V, 18V, and 24V battery systems including nickel-cadmium (NiCd), nickel-metal hydride (NiMH), lithium-ion (Li-ion), and lithium iron phosphate (LiFePO₄) battery packs. Also compatible with wind generators and solar street light systems. Input Voltage: DC 8–28V (AC input prohibited) Output Voltage: DC 5–26V, continuously adjustable; supports 2–4 series Li-ion or LiFePO₄ batteries Output Current: Up to 5A Charging Indicator: LED indicator (red light during charging; alternating red/blue flash when fully charged; automatic cutoff upon full charge) MPPT Function: Yes — Maximum Power Point Tracking for optimized solar energy utilization Minimum Input-Output Voltage Difference: 1V (buck-type regulator; input voltage must exceed output voltage by at least 1V) Ultra-Low Standby Power Consumption: Yes Operating Temperature Range: –40°C to +85°C (industrial grade) Load Regulation: ±1% Voltage Adjustment Accuracy: ±0.5% Conversion Efficiency: Up to 93% (typical), peak up to 95% depending on lighting conditions Charging Method: Fully automatic, intelligent three-stage charging No-Load Current: 3mA Input Reverse Polarity Protection: Yes Output Reverse Current Protection: Yes — prevents nighttime battery backflow Terminal Wiring: Screw-terminal connections provided MPPT Voltage Setting: Adjustable via potentiometer Setup Procedure: 1. Connect solar panel (no battery connected). Verify output voltage presence. If none, slowly decrease MPPT setting counterclockwise until output appears. 2. Decrease output voltage counterclockwise until red and blue LEDs alternate flash; then adjust output to approximate full-charge cutoff voltage. 3. Connect depleted battery and monitor output current with ammeter; fine-tune MPPT potentiometer for maximum charging current. 4. Connect fully charged battery. If blue LED is on, increase output voltage clockwise until red LED illuminates. Then slowly decrease output voltage counterclockwise until blue LED reactivates. Confirm cutoff voltage with multimeter to prevent overcharging. Alternative Setup Using Bench Power Supply: 1. Set power supply to target MPPT voltage (e.g., 18V). 2. Connect power supply to input (no battery). Increase MPPT clockwise until output ceases, then slowly decrease counterclockwise until output resumes. 3. Adjust output voltage counterclockwise until red/blue LEDs alternate flash; then set to approximate full-charge cutoff. 4. Connect fully charged battery. If blue LED is on, increase output clockwise until red LED activates. Then reduce output counterclockwise until blue LED reactivates. Verify cutoff voltage with multimeter. Key Features: 1. True MPPT tracking for efficient solar energy harvesting 2. Automatic, intelligent battery management with low standby power consumption 3. Supports multiple battery chemistries and configurations: 6V/12V lead-acid; 8.4V/12.6V/16.8V Li-ion; 7.2V/10.8V/14.4V LiFePO₄ 4. Ultra-low dropout design for high efficiency and low power loss 5. Fully automatic three-stage charging with adaptive current control 6. Low-light activation — starts charging under weak morning sunlight without manual intervention 7. MOSFET-based reverse polarity protection on input 8. Output reverse current protection prevents nighttime discharge 9. Dual LED status indication: red = charging, blue = fully charged, alternating red/blue flash = no battery connected