So I just recently replaced batteries and my voltage on highway with lights,radio,heater on is just shy of 12v.During the day when lights are off my meter reads a steady 13-13.5v.Believe I have a 70 amp alt and was wondering if this is normal voltage.I did check out the 3G upgrade in the tech section but I'm wondering if I can just have my alt built to 100amp or just go 3G?Also would my voltage regulator having anything to do hear,how can I test this?Had my alt tested at Azone by the way, checked out ok.Basically if I'm gonna put a new alt on I don't wanna deal with re-wiring if possible so I can install myself.Any suggestions to protect my $300 batteries