Newmar Power - 2-3-120 Battery Isolator

Superior Battery Charging and Isolation Solution

The Newmar 2-3-120 Battery Isolator is an essential component for managing multiple battery systems onboard marine vessels. Engineered for efficiency and durability, this isolator ensures that each battery is charged according to its needs without the risk of overcharging or discharging into another battery. It is suitable for 12-, 24-, or 36-volt negative ground DC systems, making it versatile for various marine applications.

General Description

Designed to meet the rigorous demands of marine environments, the Newmar 2-3-120 Battery Isolator is built with conservatively rated diodes and housed in a rustproof anodized aluminum heat sink case. This heavy-duty isolator efficiently charges multiple batteries from one or two alternators, preventing any discharge between batteries. The robust construction ensures reliable performance and longevity, making it a valuable addition to any marine electrical system.

Key Features

• Efficient Charging: Automatically charges multiple batteries from one or two alternators.
• Prevents Battery Dumping: Stops the discharge of one battery into another, maintaining optimal charge levels.
• Durable Construction: Features a rust-proof anodized aluminum heat sink case and conservatively rated diodes.
• Versatile Compatibility: Suitable for systems up to 48 volts DC, negative ground.
• Complete Installation Kit: Includes stainless steel mounting hardware and protective covers for terminals.

Technical Specifications

• Alternator Sources: 2
• Battery Banks: 3
• Max. Amperage Input Capacity: 120 A
• Stud Terminal Size: 6mm
• Dimensions (L x W x H): 12.5" x 4.5" x 3.1"
• Weight: 5 lbs.
• 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

Installation and Use

The Newmar 2-3-120 Battery Isolator is designed for straightforward installation and reliable operation. It should be mounted vertically for optimal cooling. The provided stainless steel hardware ensures secure attachment, and the protective covers for terminals enhance safety and longevity.