Seamless Charging for Multiple Batteries in Marine Environments

The Newmar 1-2-120 Battery Isolator is an essential component for managing multiple battery systems onboard marine vessels. Designed to allow simultaneous charging from one or two alternators, this heavy-duty isolator ensures that each battery charges according to its needs, preventing discharge from one battery into another. Its robust construction and advanced features make it ideal for 12-, 24-, or 36-volt negative ground DC systems.

The Newmar 1-2-120 Battery Isolator is built to meet the rigorous demands of marine environments. Featuring conservatively rated diodes and a rust-proof anodized aluminum heat sink case, this isolator offers durability and reliability. It efficiently charges multiple batteries while preventing overcharging, ensuring optimal performance and longevity of your battery system. This model supports a 120-amp alternator, making it a powerful solution for marine power management.

Key Features

• Efficient Charging: Allows automatic charging of multiple batteries from one or two alternators.
• Prevent Battery Dumping: Ensures that one battery does not discharge into another.
• Heavy-Duty Construction: Rust-proof anodized aluminum case with conservatively rated diodes.
• Versatile Compatibility: Rated for systems up to 48 volts DC, negative ground.
• Complete Installation Kit: Includes stainless steel mounting hardware and protective covers for terminals.

Technical Specifications

• Operating Temperature: -40 to +80°C
• Duty Cycle: Continuous rating to 50°C; derates linearly to 70% at 80°C
• Temperature Rise: 5°C at full rated current (mount vertically for optimum cooling)
• Voltage Drop: 0.7V at 50% load, 0.9V at full load
• Alternator Sources: 1
• Battery Bank: 2
• Max. Amperage Input Capacity: 120 A
• Stud Terminal Size: 6mm
• Dimensions: 6.5" x 4.5" x 3.1"
• Weight: 3 lbs

Installation and Use

The Newmar 1-2-120 Battery Isolator is designed for easy installation and reliable operation. Mounting it vertically optimizes cooling, and the provided stainless steel hardware ensures secure attachment. Protective covers for terminals enhance safety and longevity.