Over-current protection (a DC breaker) must be installed to protect a DC source (like a solar charge controller) from short circuits and to provide a means of disconnecting the DC source.
This is a panel mount breaker. It can be mounted to the back of a panel enclosure with mounting feet. Recommended for use with Schneider XW Charge Controllers or Schneider Inverters through the Schneider PDP (Power Distribution Panel) or other DC control panels.