Thanks for the reply, Morgan.
I see. Indeed, I have found a few DC relays that could appearently work perfectly, but I cannot find any of them in stock anywhere nearby of Germany (where I need it), and time is for my case a pressing issue.
I might have a better bet with the Mosfets. I'm not afraid of the adaptations, heat sink and cabling needed; but I always have trouble finding a logic-level one being able to be triggered by the 5v of Arduino. This is my first time doing something with such high amperage, thus the ones I usually use for dc motors won't do. If you have any indications, I would be glad to hear. In anyway, my search continues!
Thanks!