Tantalum Capacitors Potentials and Trends

by Tomas Zednicek Ph.D. European Passive Components Institute, EPCI Jan 19. www.passive-components.eu
Tantalum capacitors are offering excellent stability in high energy, harsh conditions, and power volumetric efficiency and low...Read More

Added passives capacity will help stabilise lead times, limit price increases

By James Carbone
However, it will remain a seller’s market in 2019 for many parts including MLCCs and resistors
Buyers of multilayer ceramic capacitors (MLCC), chip resistors and other passive components can expect supply to remain tight in 2019, although...Read More

Moderating outlook won’t slow industry momentum

By Victoria Kickham
Advancing technology and the digital economy will keep the electronics sector humming in 2019 and beyond, industry insiders say

Electronics industry leaders are maintaining a bright outlook despite predictions of moderating economic...Read More

Expect higher average prices for embedded processors

By James Carbone
Prices will rise because more higher-cost 64-bit embedded microprocessors will be designed into electronics equipment.

The global market for embedded microprocessors (MPUs) will grow about 5 per cent to $77.7 billion in 2018 because...Read More

Industry embraces strong outlook, laments tight labor market

By Victoria Kickham
Demand for labor heats up as 2018 comes to a close and the economy continues its solid pace.

Electronics industry companies will continue to reap the rewards of a strong US economy in 2019, but they will face accompanying challenges...Read More

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Solar Power Manager For 12V Lead-Acid Battery


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 For 12V Lead-Acid Battery Board Overview

Solar Power Manager For 12V Lead-Acid Battery Board Overview

Solar Power Manager For 12V Lead-Acid Battery Board-Build a solar powered system

Build a solar powered system


  • Constant voltage (18V fixed) MPPT algorithm, maximizing solar energy conversion
  • Designed for standard 18V solar panels and 12V lead-acid battery
  • Multiple high efficiency outputs for 12V or 5V large power devices
  • Full protection functions, a safe and high efficiency solar power module
  • A variety of status indicators, system status at a glance


  • Street lighting
  • Intelligent Agriculture
  • Environmental Monitoring Station


  • 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.



  • Sunflower: Solar Power Manager Micro                                    x1
  • Black Jumper                                                                                     x3
  • Nylon pillar M3*16                                                                          x4
  • stainless steel screw M3*10                                                           x4
  • Aluminum cooling fin (Black) 14*14*7mm                                  x1
  • Thermal conductive silicone pad (Blue) 14*14*0.5mm                    x1
  • Aluminum cooling fin (Black) 50*50*12.7mm                             x1
  • Thermal conductive silicone pad (Blue) 50*50*1.5mm                    x1
  • Female DC power jack adapter                                                  x1