The DFRobot Solar Power Manager series are designed for IoT projects and renewable energy projects, providing safe and high-efficiency embedded solar power management modules for makers and application engineers. This medium-power high-efficiency solar power management module allows you to charge a 12V lead-acid battery with a maximum of 4A using a standard 18V solar panel.

Check the brief specification for all Solar Power Manager Series Products.

Solar Power Manager For 12V Lead-Acid Battery is a medium-power high-efficiency solar power management module, which is able to charge a 12V lead-acid battery with a maximum of 4A using a standard 18V solar panel. It is suitable for applications within 100W, such as 12V lighting equipment, security monitoring, small robots, pumps or environmental monitoring stations. It features as MPPT(Maximum Power Point Tracking) function, maximizing the output power of solar panels under various sunlight. Compared with common PWM solar controllers, it can improve charging performance by 10%-30%. Benefited from its small size and light weight, it is easier to embed it in your projects. The module provides dual high-power outputs 5V 5A (OUT1) and 12V 8A (OUT2) and dual USB outputs 5V 2.5A (USB1/USB2). Except USB1, all outputs can be turned ON/OFF by I/O pins of most controllers (3.3V/5V compatible). This feature helps to dynamically power loads and reduce power consumption. Various protection functions are also employed to ensure the safety and stability of the solar systems.

Solar Power Manager Series

Name	Solar Power Manager v1.0	Solar Power Manager 5v v1.1	Solar Power Manager Micro v1.0	Solar Power Manager v1.0
SKU	DFR0535	DFR0559	DFR0579	DFR0580
Solar Power Management IC	LTC3652	CN3065	SPV1050	CN3767
Solar Input Voltage	7V-30V	4.4V-6V	0.5V-4V	15V-25V
Maximum Charge Current	2A(Solar/USB)	900mA(Solar/USB)	70mA(Solar)/100mA(USB)	4A(Solar)
Topology	DC-DC Buck	Linear Regulator	DC-DC Boost	DC-DC Buck
Battery	3.7V Lithium Battery	3.7V Lithium Battery	3.7V Lithium Battery	12V Lead-Acid Battery
MPPT	9V/12V/18V Optional	5V Fixed	75% Open Voltage	Fixed 18V
Battery Protections	Over Charge/Over Discharge/Over Current/Reverse Connection Protections	Over Charge/Over Discharge/Over Current/Reverse Connection Protections	Over Charge/Over Discharge/Reverse Connection Protections	Over Charge/Over Discharge/Reverse Connection Protections
Output Protections	Short Circuit/Over Current/Over Heat Protections	Short Circuit/Over Current Protections	Short Circuit/Over Current Protections	Short Circuit/Over Current/Over Heat Protections
USB Charge IN	Yes	Yes	Yes	No
USB OUT	5V 1.5A	5V 1A	No	5V 2.5A x2
Regulated OUT	Three Regulated Outputs 3.3V 1A；5V 1.5A；9V/12V 0.5A	One Regulated Output 5V 1A	One Regulated Output 3.3V 90mA	Two Outputs 5V 5A; 12V 8A
Dimension	78.0mm×68.0mm	33.0mm×63.0mm	30.0mm×30.0mm	68.0mm×68.0mm
Features	A complete multifunction solar power management module. Applications: Small Solar Street Lamp, Solar Powered Robots  For 9V/12V/18V Solar Panels within20w	A small and easy-to-use 5V solar power management module. Applications: Solar Power Bank, Solar Environment Monitors For 5V Solar Panels within 10W	A micro power solar power management module for low-power sensors and controllers. Applications: Wireless Sensor Network, BLE iBecon For 1V/2V/3V Solar Panels within 0.5W	A medium power solar management module for 12V lead-acid batteries. Applications: Street lighting, intelligent agriculture, environmental monitoring station, UPS For 18V Solar Panels within 100W

• Solar Power Management IC: CN3767
• Solar Input Voltage (SOLAR IN): 15V~25V
• Battery Input (BAT IN): 12V Lead-Acid Battery
• Charge Current: 4A Max Trickle Charging, Constant Current, Constant Voltage, Float Charging Four Stages Charging dedicated for 12V Lead-Acid Battery
• Float Charge Voltage: 13.55V
• Over-discharge Protection Voltage: 10.8V
• Solar Charge Average Efficiency (18V SOLAR IN): 94%
• OutputsNote1: OUT1 5V 5A, OUT2 12V 8A, USB1 5V 2.5A, USB2 5V 2.5A
• USB1/USB2 Support Three USB Charge ProtocolsNote2
  • Apple 2.4A: DP=2.7V, DM=2.7V
  • SAMSUNG 2.0A: DP = 1.2V, DM =1.2V
  • BC1.2: DP=DM=0V (Short)
• OUT1/USB1/USB2 Efficiency: 93%@50%Load
• OUT2 Efficiency: 98%@50%Load
• Quiescent Current: <4 mA
• Protection Functions
• SOLAR IN: Backflow/Reverse Connection Protections
• BAT IN: Over-discharge/Over-charge/Reverse Connection Protections
• OUT1-2/USB1-2: Short Circuit/Over Current/Over Heat Protections
• Operation Temperature: -40℃～85℃
• Dimension: 68.0mm*68.0mm

Note 1: OUT1/USB1/USB2 shared 5A current driving capacity (peak current 8A), that is, the total output power of the three outputs should not exceed 5V*5A=25W (peak 40W).

Note 2: To ensure whether the communication devices you use are compatible with the protocols listed, please consult your communication device manufacturer or retailers for details. If your device does not support the USB charging protocol mentioned above, usually it will limit the charging power to 5V*1A=5W for security sake. This is not caused by the failure of the USB output or insufficient output capability.