I have a friend (yes I have ONE FRIEND ) that is putting together a "small cottage" solar system.
He seems to be doing all the right things, but he asked me what the difference is between a DC fuse and a AC fuse? He said his "instructions" (I think he's reading a book on PV systems) call for a DC fused disconnect between the solar panels and Charge controller and a DC fused disconnect between the Charge controller and the batteries. Now I agree that there needs to be disconnects between devices, but do they need to be fused?
I answered "I don't have a clue, but it seems to me an Amp is a Amp, and it doesn't care which way the electrons are going"
He's pretty insistent that that there is some difference?
so I ask? Is there such a thing as a DC fuse? Why would it be different than a regular AC slow blow fuse?