You really don't need a fuse between the solar panels and the charge controller. Unlike a battery or a conventional power supply that sends humongous amounts of current into a short, solar panels will NEVER produce more current than their rated Short Circuit Current (Isc). This is only a few percent above the Maximum Power Point current so if your wiring can handle normal current it can also handle the slightly higher current the panels will send into a short.
Likewise, if a fuse is sized to handle the solar panel's normal output the current will stay low enough to keep it from blowing if the wires are shorted.
Where you DO need fuses are on the battery side of things to interrupt the huge rush of current if something shorts there.