Solar Panel 12v Battery Charger Circuit Diagram

12v battery charger with auto cut off circuit diagram.

Solar panel 12v 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. 2k2 1 4 watt resistor 1no. 7808 voltage regulator is used for constant supply to the operation of the circuit to cut at a required fixed voltage. 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 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. I have added in the brown wire as brown line the diode as a blue line i have also added in the ve ve makers for the battery. 1n4007 diodes 3nos. One 555 timer ic is used for detecting the voltage level and relay is used to disconnect the ac input.

Solar panel 20v 1 amp. Circuit diagram of solar panel battery charger step 6 from below you can see the soldered connections how they run along the copper tracks. Before delving into the following concepts you can probably try this super easy solar battery charger which will ensure safe and guaranteed charging of a small 12v 7 ah battery through a small solar panel.