Some Mechman alternators are available with the optional adjustable voltage feature. The "AVBM" module allows the user to increase the charging voltage of their Mechman alternator to optimize their 12v system, or to raise the charging voltage to suitable levels for 14 volt or 16 volt batteries. Safe voltage levels must be maintained for your batteries and for your vehicles electronics, so consult with a Mechman sales representative before ordering.
Many late-model vehicles have their alternator charging voltage regulated by the vehicle's engine computer. A high output alternator will produce more amperage, but will not change the charging voltage on a PCM controlled vehicle. Even though the voltage will remain the same, rest assured that you will be getting more amperage supplied to keep your battery charged.