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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been replaced by a FET-comparator combination.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.
Download Solar charger circuit diagram for
12v lead-acid battery
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http://www.den-uijl.nl/electronics/solar.html
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