30 volts on alternator AC ripple test & 3 amps on parasitic draw test…impossibly high?

2021 Nissan Altima SV. Have had to jump car a few times the last month or so. Battery will read 12.3 ish volts after jump and then letting it sit for a while, but voltage jumps to 14.1 with car running so I figured the alternator was fine. Ran a parasitic draw test with multimeter and got 3 amps, which was really high and can seemingly only be caused by a few components. So I then did an AC ripple test on the alternator and got 30 volts…which seems extremely high even if the diodes in the alternator are shot? Tested an outlet in the house with same settings and got 125 volts so I know it was really reading 30 volts. Is that even possible just from blown diodes? Or something else that might be causing the issue? Unfortunately blew the internal fuse on the multimeter by rechecking parasitic draw with setting too low, so can’t recheck with alternator unplugged until new one arrives. Should I just go ahead and order a new alternator or wait for new multimeter to confirm parasitic draw drops with alternator unplugged?