Hacked Gadgets Forum

April 13, 2014

Arduino Solar Charge Controller

at 10:10 am. Filed under DIY Hacks, Electronic Hacks

Arduino Solar Charge Controller

 

deba168 from India designed and built this Arduino Solar Charge Controller to provide electrical power in areas where the grid can’t always provide power when needed. Code and schematics are provided so you can get some inspiration from the design.

 “At first the charge controller will check the solar panel voltage and compare it with battery voltage ,If it is greater then the Arduino will starts sending pulse width modulation(PWM) signals to the mosfet(Q1) in order to charge the battery .When the solar panel voltage was below the battery voltage ,this pwm signals will not send by Arduino .

Then next the micro controller will check the battery voltage ,if the battery voltage was below 6.96 v volts then the battery will be charged in boost mode ,that mean the battery will be charged with maximum amperage ,this boost mode of charging will be done by sending pulse width modulation signals with 95% duty cycle .

when the battery voltage reaches above 6.96V the charging mode will turn as absorption mode from boost mode ,this was done by changing the duty cycle from 95 % to 10%.This absorption mode will keep the battery fully charged.

A pulse will be send to the load mosfet(Q2) to enable the load during night ,if the battery was too low and reaches to 6.2v volts then in order to prevent deep discharge of the battery ,the load will disconnected.”

 


 

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