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  Solar charger circuit diagram for 12V lead-acid battery

       
       
       
       

Solar charger circuit diagram for 12V lead-acid battery

 

This solar charger circuit diagram for 12V lead-acid battery is intended for charging sealed lead-acid batteries with a solar panel in small and portable applications. The customary diode that prevents the battery from discharging through the solar panel has been replaced by a FET-comparator combination. The charger will stop charging once a pre-set voltage (temperature compensated) has been reached, and recommence charging when the voltage has dropped off sufficiently. The load is disconnected when the battery voltage drops below 11V and reconnected when it gets back to 12.5V.

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