Bumping Stock alternator voltage

So to make a long story short. I have a 14V setup ( XS power lithium D3400 ) My high output alternators regulator failed so I need to ship it out to get it repaired. I plan to re install my stock alternator for the time it’s being repaired because i have a road trip coming up. Would it be okay if i keep the diode inline to allow the stock alternator to charge at 15Vs?