Newmar 1-3-70A Isolator 1AIT 3BATT 70AMP

The Newmar 1-3-70A Isolator 1AIT 3BATT 70AMP is a heavy-duty battery isolator designed for tactical vehicles, emergency response units, and expedition platforms that require reliable multi-battery charging from dual alternator systems. Built for law enforcement and military operators who depend on uninterrupted auxiliary power, this isolator automatically manages charge distribution across up to three battery banks while preventing parasitic drain and battery discharge when the engine is off. Its robust construction and proven reliability make it the standard choice for command vehicles, mobile command centers, and off-grid tactical operations.

This isolator features a 70-amp capacity rated for high-output dual alternator systems, enabling simultaneous charging of three separate battery banks without voltage drops or cross-discharge. The unit automatically isolates the primary starter battery from auxiliary systems, protecting engine starting capability even under extreme draw conditions. One-input-three-output (1AIT 3BATT) configuration allows operators to prioritize the main vehicle battery while feeding independent circuits for communication equipment, lighting arrays, winches, or tactical systems. Solid-state switching eliminates mechanical relay failures common in field conditions, ensuring consistent performance in harsh environments, extreme temperatures, and prolonged deployment scenarios.

Tactical teams, law enforcement fleet managers, and military vehicle operators benefit most from this isolator's dependable architecture when integrating complex auxiliary power demands into vehicles with existing dual-alternator charging systems. Installation requires direct connection to alternator output and battery terminals; professional integration with vehicle-specific wiring harnesses is recommended to ensure compliance with OEM electrical specifications. The compact 3-pound form factor fits standard engine bay configurations without requiring extensive modification, making retrofits feasible on established platforms. Proper sizing for your alternator output and battery bank capacity is essential—the 70-amp rating accommodates most tactical vehicle applications, but field verification ensures optimal performance and system longevity.