deprived wrote:
I found this chart.
http://assets.bluesea.com/files/resources/newsletter/images/DC_wire_selection_chartlg.jpg
If I am reading this correctly (and it's likely I'm not) the run from the controller to the battery should be a 100amp fuse. Am I getting this?
That sounds reasonable to me.
Realistically, if the wire is only for the solar charging, you could equally well use a smaller fuse if you wanted to, though there's no particular reason to want to do so. The fuse should, of course, be larger than the maximum charge current produced by the solar setup. What you don't want is a fuse larger than the safe current carrying ability of the wiring.