The 55 amp Bosch alternator generates maximum welding amperage equivalent to 120 amps. When engine compartment space is premium, the piggyback installation may not be an alternative. The Bosch alternator is designed to self saturate and shut itself down in the event of short circuit conditions, preventing any damage from taking place. Bosch alternators utilize press-fitted, very robust diodes. This allows for efficient heat dissipation and cooling.
American alternators utilize a 'cold' rating.
However, when a vehicle runs it becomes very hot and the alternator is less efficient when its hot. Remember that an alternator's output doesn't necessarily correlate to a vehicle's amperage needs. It depends on the accessories and the amount of amperage they collectively draw. The Bosch 90 amp is engineered not only to produce 90 amps but also to cool efficiently and properly while producing 90 amps. We use solid state technology, no moving parts.