I think the Problem wasn't enough power, but i have a new Problem.
I set them up with CESU on each side. Now i can only teleport from the lower level to the upper. I double checked everything, the CESUs are charged and the outputside is faceing to the pad, but its not working, its just doing nothing.
BTW, when i tested it yesterday there was an explotion somewhere, but i checked it, everyhting is working well, except the teleporter. Maybe that sounds dumb, but may it be that the teleporter is "damaged"?