I have a pwm that I installed the other day and it works great. I ran it for an hour and I had minimal heat. I have it hooked up to a regulater and a 30amp fuse. What happened was my battery drained over night with the ignition off. It was draining current but, not to my generators. I really don't know what could of happened here. I'm getting ready to install a toggle switch. Can any one help?