Dual Operation VSS (Voltage Sensitive Switch) 275A Cont MotorizedThese Voltage Sensitive Switches (VSS) automatically sense connected battery bank voltages and provide optimal, efficient charging of the second bank. The VSS allows for independent battery banks to be combined or isolated based on the presence of a charging source (such as an engine alternator or battery charger), while also offering remotely activated, high current, emergency parallel connection. Designed and constructed for longevity in the marine environment with tinned copper conductors, stainless steel nuts, and high-temperature, fiber-reinforced plastics. The units are ignition protected, provide On/Off switching operation, and may be recessed or surface mounted. The remote emergency parallel function can be operated through a momentary button on the dash to parallel the batteries for 10 minutes. Once these 10 minutes have passed, the voltage-sensitive switch will stay engaged if the voltage is high enough. If not, it will disengage.Features:Dual battery sensingManual override option