Solar Panel Controller Circuit

Q1 q2 2n3906 or the majority of small signal pnp.

Solar panel controller circuit.

This is the driving circuit of the diy automatic solar charge controller. 16w includes power dissipation of d3 typical dropout voltage. Solar charge controller specifications. After finishing the circuit you need to set the upper and lower limits.

R1 r2 n a see text. Q4 2n2905a or comparable medium power 500ma pnp q5 2n3442 or 2n3055 high power npn one white led 2 7 volt d1 1n4148 or just about any small silicon diode. Diy automatic solar charge controller step 1. The pot or the preset is used to accurately set the voltage level that may be considered as the safe value for the battery.

The input is given to the shown input points of the ic and the output for the battery received at the output of the ic. The 5v relay is the main. 7 to 14v adjustable not recommended for 6v applications max power dissipation. 18 to 20v output voltage range.

Parts list for the low drop solar panel charger circuit.