I am using a 20W solar panel, maximum voltage 21V & maximum current 1.23 A. I am using LM2596 to dtep-down to 5V to charge my powerbank, hich will later power my Nodemcu (ESP8266 board.)
Issue in conditions I am getting 14V and when connecting it to LM2596 it's lowering it to 1.6V and not going up to the desired 5V.
Am I doing something wrong? Am I missing something? Any suggestions?
Note : I am using standard LM2596 potentiometer module.