I am ready to finish the installation of the SmartSolar 100/30 MPPT charge controller and am confused as to whether or not I need to use the grounding screw on the controller.
On our trailer, the negative battery lead connects to the chassis. Nothing else connects to the negative battery terminal.
I will wire the controller b+ and b- directly to the battery.
Do I need to use the grounding screw on the controller body to ground it to the chassis?