Depends on what you are doing.
I used the SSR, because I was the validation engineer for the truck and had a few. However, it is rated at 20 to 30 Amps and will handle a 12V mini compressor, not to mention a 12V coffee pot without melting, smoking or starting on fire.
It also has a weather flat that is spring loaded to keep everything else out of the socket. If it rains, the socket stays dry. Third, one thing I really liked, it is held in place by a large hand tighten nut at the back that has a unidirectional cam so it does not come loose.
It is all up to you. Heck, If I knew I had any left, I would send you one.
An inline fuse is a small fuse holder with wires on both sides that can be placed in the 12V delivery line to any device you wish to protect.
