MULTI-VOLTAGE AUXILIARY POWER SYSTEM FOR HEAVY-DUTY EQUIPMENT

A multi-voltage auxiliary power system is for heavy-duty equipment having a starter and vehicle electronics powered by a nominal 12V supply. The multi-voltage auxiliary power system has a battery system configured to provide first and second output voltage levels that are different from each other, in which the first output voltage level is higher than the second output voltage level; and control circuitry configured to: detect a cranking event in the heavy-duty equipment; in response to detecting the cranking event, apply the first output voltage level to the starting and battery system; and switch to applying the second output voltage level to sustain the nominal 12V supply for the vehicle electronics when the cranking is complete.