So I just installed a 320amp alternator in my 2007 saturn vue. I was expecting my warning lights to come after installation (which they did). So I tested the battery with the car off and it read at slightly over 12v. Then started it and tested at the battery and the alternator, both read at 15.33v. The voltage didn't change whether at an idle or bumping the tachometer up to 3 grand. I've never had a high output alternator of this size and I'm concerned with the higher voltage damaging the electrical system. I did the big 3 with sky-high audio 1/0 ofc. The grounds all tested good on the dmm. Is the higher voltage normal with higher output alternators normal or am I risking something failing leaving it installed?