12v Solar Battery Charger Circuit Diagram

The post explains how to build a simple 12v solar charger circuit with boost converter capable of charging 12v battery from a 3v solar panel.

12v solar battery charger circuit diagram. The schematic shown here is a very effecient automatic solar battery charger circuit which can be used to charge 12v sla batteries from solar cells. 3 solar charger and driver circuit for 10w 20w 30w 50w white high power smd led. The following solar panel wiring diagram shows that a 12v 120w pv panel is connected to the solar charge controller panel negative terminal of panel to the negative terminal of mppt charge controller and vice versa for positive terminal.

The 3rd idea teaches us how to build a simple solar led with battery charger circuit for illuminating high power led smd lights in the order of 10 watt to 50 watt. 10w includes power dissipation of d1 typical dropout voltage. The charging current passes to lm317 voltage regulator through the diode d1.

You are able to ideally take advantage of this circuit for applications such as inverters portable chargers etc. Solar battery charger operated on the principle that the charge control circuit will produce the constant voltage. 7808 voltage regulator is used for constant supply to the operation of the circuit to cut at a required fixed voltage.

This simple 12 volt battery charger circuit diagram gives you a outline design for the general battery charger and you can add additional features to this circuit like reverse polarity protection by placing a diode at the output. The circuit is using an lm317t voltage regulator ic. The bc548 transistor is working as a switch which will disconnect the ground of the lm317t from the solar cell when the battery become full charge.

2 to 2 75v depending upon load current maximum current. 5 to 14v adjustable may be reduced further by shorting r2 max power dissipation. 1 5a internally limits at about 2 2a.

The output voltage and current are regulated by adjusting the adjust pin of lm317 voltage regulator. 20w 12v or 10w 6v output voltage range. 12v battery charger with auto cut off circuit diagram one 555 timer ic is used for detecting the voltage level and relay is used to disconnect the ac input.