Fresh Stock 12 volt Alternator Shield

The ARCO Zeus Alternator Shield protects high-output alternators from damaging voltage spikes caused by sudden battery disconnects, including lithium BMS shutdowns. It safely clamps excess voltage to prevent diode failure, extend alternator life, and ensure reliable performance in modern high-amperage systems—all with quick, easy installation and proven durability.

The ARCO AS12 Zeus Alternator Shield is designed to protect 12V alternators from destructive load dump events that can occur when batteries are unexpectedly disconnected from the charging circuit. Common in modern lithium battery installations, these sudden disconnects can create damaging voltage spikes that threaten alternator diodes and charging system components. The Zeus Shield helps safeguard the alternator by absorbing and redirecting excess voltage before damage can occur.

• Designed for 12V charging systems utilizing high-output marine alternators

• Protects against voltage spikes caused by sudden battery disconnects, including lithium battery BMS shutdown events

• Clamps excess voltage and safely diverts energy to ground to reduce the risk of alternator diode failure

• Helps extend alternator service life by reducing exposure to damaging load dump conditions

• Supports reliable operation in modern high-amperage charging systems commonly found on boats and other demanding electrical installations

• Compact protection device designed to integrate with alternator charging systems without affecting normal charging performance

The ARCO AS12 Zeus Alternator Shield provides an added layer of protection for 12V charging systems operating with lithium batteries and high-output alternators. By mitigating damaging voltage spikes before they reach critical charging components, it helps improve charging system reliability and protect valuable alternator investments.