Keep in mind the vans wiring is only capable of ~70A. Alternator output will depend on demand, and most of the time it will be under 50A. However.........in the event of a short circuit or otherwise high demand, the alternator will be capable of about 2X the max capacity of the circuit. The result could be melted fusible links and/or wire. It's highly recommended you upgrade the cable and put some sort of fusible link/breaker in the circuit that will open if the amperage exceeds the rated capacity of the cable. Tim