DF Robot Solar Power Management - 12V Lead-Acid

The Solar Power Manager for 12V Lead-Acid Battery is a compact, high-efficiency module designed for charging 12V lead-acid batteries using an 18V solar panel with up to 4A output. Ideal for IoT and renewable energy projects, it supports applications up to 100W, such as lighting, security, small robots, and environmental monitoring. Featuring MPPT (Maximum Power Point Tracking), it enhances solar panel efficiency by 10%-30%. The module offers dual high-power outputs (5V 5A, 12V 8A) and two USB ports, all with overcurrent protection for safe, dynamic power management.

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.

Quick Spec

• Control chip: CN3767
• Solar panel voltage (SOLAR IN): from 15 V to 25 V
• Battery voltage (BAT IN): 12 V lead acid battery
• Charging voltage: four-stage up to 4 A
• Sustaining voltage: 13,55 V
• Fixed charge voltage: 14,8 V
• Deep discharge protection limit: 10,8 V
• Outputs:
• OUT1 5 V 5 A
• OUT2 12 V 8 A
• USB1 5 V 2.5 A
• USB2 5 V 2.5 A
• Average efficiency:
• SOLAR IN (for 18 V panel): 94 %
• OUT1/USB1/USB2:
  90 % for a 10 % load
  93 % for 50 % load
  92 % for 90 % load
• OUT2:
  99 % for a 10 % load
  98% for load 50%
  97% for 90 % load
  
• Module current consumption: <4 ma
• Protections:
• SOLAR IN: against reverse current/reverse connection
• BAT IN: against deep discharge/overcharge/reverse connection
• OUT1-2/USB1-2: short circuit/overvoltage/overheating
• Working temperature: from -40 ℃ to 85 ℃
• Dimensions: 68 x 68mm

Board Layout

Wiring Diagram

Resources

• Product Page
• Product Wiki
• Schematic
• CH3767 Datasheet

Shipping List

• 1 x DF Robot Solar Power Management - 12V Lead-Acid
• 3 x Black Jumper
• 4 x Nylon pillar M3*16
• 4 x stainless steel screw M3*10
• 1 x Aluminum cooling fin (Black) 14*14*7mm
• 1 x Thermal conductive silicone pad (Blue) 14*14*0.5mm
• 1 x Aluminum cooling fin (Black) 50*50*12.7mm
• 1 x Thermal conductive silicone pad (Blue) 50*50*1.5mm
• 1 x Female DC power jack adapter