50w 4a 12v nominal open circuit voltage.
Solar panel charge controller circuit.
Solar charge controller specifications.
This is the driving circuit of the diy automatic solar charge controller.
The 5v relay is the main.
Diy automatic solar charge controller step 1.
Voltage output is variable.
18 to 20v output voltage range.
16w includes power dissipation of d3 typical dropout voltage.
After finishing the circuit you need to set the upper and lower limits.