Thanks for the reply, I guess my math was wrong. I was using P = V squared / R which would be 13.8 squared (190.44) / 1 = 190.44W. Yes, I want to limit the maximum amperage running through so that it doesn't get all the way up to 25A. Having a way to vary the max amps would be really nice. I'm currently experimenting with Peltier modules and I don't want to fry it by putting too much amperage through it. It's probably just me, but I don't see any link to a schematic that would limit the amps to 8.