I use a solar panel which provide 12v-3W. I convert that to 5V using this converter.
This 5V is used as input of a card which to charge a lipo battery and as a power supply for a raspberry zero.
The problem when the power of the panel is under the nominal power of the raspberry Pi. The lipo chager don't work properly.
So my question : how to cut power line from solar panel if current is under 400mA ? Ref of a module or CI which do that?