Solar Panel Controller Circuit

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.

Solar panel controller circuit.

Q3 2n3904 or the majority of small signal npn. Parts list for the low drop solar panel charger circuit. After finishing the circuit you need to set the upper and lower limits. 7 to 14v adjustable not recommended for 6v applications max power dissipation.

The 5v relay is the main. The pot or the preset is used to accurately set the voltage level that may be considered as the safe value for the battery. R1 r2 n a see text. Q1 q2 2n3906 or the majority of small signal pnp.

50w 4a 12v nominal open circuit voltage. This is the driving circuit of the diy automatic solar charge controller. The shown solar panel regulator circuit is framed as per the standard mode of the ic 338 configuration. 18 to 20v output voltage range.

Solar charge controller specifications.