The correct fuse size for a 12V fridge depends on the fridge’s maximum current draw, usually listed in the user manual or on the manufacturer's plate. As a general rule, most 12V fridges will require a fuse between 10 to 15 amps. The fuse protects your wiring and fridge from electrical faults, so it’s crucial not to use a fuse that's too high, as this could fail to protect your setup. Always choose a fuse that matches or is slightly above the fridge's maximum draw but never exceeds the cable’s rating.