A properly functioning alternator (and regulator) cannot, repeat CANNOT be made to fail by putting less than peak demand on it.

What this means to you is that an alternator designed for 160 amp that is installed in a system which only requires 50% or less from it is causing less wear and tear on the alternator than a system which requires more.

Bottom line, you replaced factory stuff with crap. That crap failed quickly and was replaced with more crap. Now you're stuck in this seemingly endless crappy cycle probably due to remanufacturing/rebuilding qc crap issues.

Sorry. Keep your tools clean and organized. Won't be long before you can replace alternators faster than anyone else.

Clay