Nope, it won't, it's too small for that, it will always need more energy input to keep the reaction going than the reaction itself produces.

By producing energy, I meant hosting some fusion reactions, even if few of them compared to the external heating power. Sorry for the confusion.

By the way, do you know what is the estimated gain factor of W7X, even if < 1 ? I could not find that info on the web.

No clue, unfortunately ... I might have known at some point, but I unfortunately don't remember the source anymore either ...