Question on solar controller hook up?
I finished up most of my solar install today and I noticed an issue when hooking up the solar controller to the batteries. I'm using an A/B Both switch to control what bank or banks I want to run....
Forum Discussion
jrnymn7 wrote:
My understanding is the fuse is to protect the controller from a shorted battery, not the other way round. Am I mistaken? ...
You are mistaken. The fuse is there to prevent a fire if a failure causes excess current to flow and overheat that wire. In this case, the most likely failure would be a short in the wire or in the charge controller. That would blow the fuse and stop the current flow.
A "shorted battery" would have no voltage and therefore provide no current to the wire or controller. The charge controller has a limited output current so it can't provide enough current to overheat the wire, even into a short.
