I just purchased the baby brother of this for my grandson (the 1000w 12v model). I haven't received it yet, so can tell you if it needs it.
You will know if it requires it the first time you hook it up, if there is a loud snap and arc, you need it. Be careful and don't make it on the flat part of a current-carrying connection, or screw threads, or something like that. It can give a large divot/burn mark. If you need it, you need it. If you don't, then you don't.
Let me know how you like it. I assume this is the one:
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