DFRobot Solar Power Manager for 12V Lead Batteries

The DFRobot Solar Power Manager series is designed for IoT projects and renewable energy projects, offering you safe and highly efficient solar power management modules. With this medium-power, highly efficient solar power management module, you can charge economical 12V lead-acid battery with a maximum of 4A with a standard 18V solar panel. This charge controller is suitable for applications within 100W, such as 12V lighting systems, security monitoring, small robots, pumps or environmental monitoring stations. The module has an MPPT function (Maximum Power Point Tracking), which maximizes the efficiency of the solar module. MPPT is able to maximize the conversion efficiency of solar energy even in weak sunlight. Compared to traditional PWM solar controllers, it can improve charging power by 10% to 30%. Thanks to its small size and low weight, it can be easily integrated into your projects. The module offers two high-output 5V 5A (OUT1) and 12V 8A (OUT2) as well as two USB outputs 5V 2.5A (USB1/USB2). Except for USB1, all outputs can be switched on and off via the IO pins of most controllers (3-3V/5V compatible). This function helps to supply loads dynamically and reduce power consumption. In addition, various protection functions are used to ensure the safety and stability of solar systems.

Info:

OUT1/USB1/USB2 share 5A current capacity (peak current 8A), i.e. the total output power of the three outputs should not exceed 5V*5A=25W (peak 40W).

Recommended Accessories:

12V lead-acid battery
Solar cell 18V

Features:

Constant voltage MPPT algorithm to maximize the efficiency of the solar module
Designed for standard 18V solar cells and 12V lead-acid batteries
Multiple high-efficiency outputs for 12V or 5V devices
Suitable for intelligent agriculture, street lighting, pumps and environmental monitoring stations
Integrated protection for battery: Overcharge protection, deep discharge protection and reverse polarity protection
Integrated protection for voltage outputs: Short circuit protection, overload protection and temperature protection

Documentation:

DFRobot Wiki

Technical Details:

Solar energy management IC: CN3767
Solar input voltage (SOLAR IN): 15V to 25V (18V nominal)
Battery input (BAT IN): 12V lead-acid battery
Charging current: 4A max. Maintaining charge, constant current, constant voltage, maintaining charge four stages for 12V lead battery
Charge maintain voltage: 13.55V
Deep discharge protection voltage: 10.8V
Average efficiency of solar charging (18V SOLAR IN): 94%
Outputs: OUT1 5V 5A, OUT2 12V 8A, USB1 5V 2.5A, USB2 5V 2.5A (total max 25W)
USB1/USB2 support for three USB charging protocols

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% at 50% load
OUT2 efficiency: 98% at 50% load
Standby current: <4 mA
Protection features
SOLAR IN: Backflow/backflow connection protection
BAT IN: Overcharge protection, deep discharge protection and reverse polarity protection
OUT1-2/USB1-2: Short circuit protection, overload protection and temperature protection
Operating temperature: -40°C to 85°C
Dimensions: 68 x 68mm
Weight: 112g