MPPT controller (15A)

I. PCB Wiring Diagram
 
II. Test Conditions
        1. Use a switching power supply with an input of 15-30V.
        2. Use a resistance wire of approximately 5mΩ to simulate a battery.
        3. Use a 12*12 aluminum heat sink as the substrate, simultaneously cooling the MOSFET.
 
III. Test Results
       1. Based on the above test environment, the module works normally.
 
        2. The current effect is shown in the figure below. At 20Ah, the current fluctuates during operation due to the heat dissipation issue of the INA226. The module is stable at 15Ah.
 
V. Precautions
       1. Safety precautions must be taken during operation, especially when exceeding the safe voltage.
       2. Batteries are a potential hazard. Do not directly connect batteries for testing before the test is completed, especially lithium batteries.
       3. Heat dissipation is crucial; MOSFET heat dissipation is essential, otherwise, the MOSFET may overheat and be damaged. The INA226 is prone to significant temperature drift due to temperature issues; it is recommended to add a heat sink to the INA226.
 
VI. About Firmware
       1. There are many open-source projects available for firmware development. The joy of tinkering lies in continuously learning new knowledge and pushing one's limits; therefore, it is recommended to develop your own firmware.
       2. If you want to test the firmware, you can join group 838630818 to download it. The firmware is for testing purposes only and is not open source.