Hello everyone,
We have the following setup for a raspberry pi Zero solar project :
RaspberryPI zero
5W solar panel
2000mAh battery

The raspberrypi zero is connected to the 5V USB out. In the morning, the battery being out of energy, the solar panel starts to provide energy and charging the battery, the RaspberryPi will not restart, even after a full day of Barcelona sun. We have to unplug/replug it so that it starts. It seems the board does not provide power until we do this action.
What can we do to avoid this behavior ?