Easy to fit - no alternator/trigger wire connection required. Red LED indicator. Max output 140 amps. Allows charging of auxiliary/leisure battery bank without discharging starter battery. The voltage sensitive relay will make sure the starter battery is fully charged first before switching the charge to the leisure battery. Simple to fit. Cuts in at 13.7 volts and breaks at 12.8 volts.
See it on the H-C Cargo website.