Fuse solar AT THE BATTERY. Reason?
From the battery to the controller the wiring is vulnerable to full battery wattage. If there is a fault between the battery and the controller the battery fuse (a foot and a half distant to protect against corrosion) will protect the 2 controller wires.
These days controllers have fuses, right? Or did they disappear along with common sense? The fuse in the controller should protect the controller and wiring to the panels.
On a PROPER SYSTEM is is not sorta impossible to damage a solar panel which is enduring a full short circuit condition for oh say, five years?
But by arcing I can melt terminals on a high wattage system. Not with 150 watts, rather a thousand or two. Exactly the same thing as a circuit breaker fire. Following manufacturers instructions, and regular maintenance and inspections will eliminate this possibility.
