This group includes middle size alternators. 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 100 Amp alternators and 24 Volt 75 Amp alternators with built-in regulator.