This group includes the biggest alternators we produce. They were developed to work under electrical and mechanical heavy duty conditions. All the parts we designed to endure heavy work: large around shaft, bigger bearings, copper diode cooler, thicker shields, high temperature copper wires, epoxy impregnated, etc. At the present time, we have available 12 Volt 130 Amp alternators and 24 Volt 100 to 160 Amp alternators with or without built-in regulator.