Newmar Power 2-3-120 Battery Isolator for Dual Battery Systems

2-3-120 Battery Isolator

This heavy-duty isolator allows charging multiple batteries automatically from one or two alternators and prevents the discharge or dumping of one battery into another. Each battery is charged according to its need without overcharging and is rated for 12-, 24-, or 36-volt negative ground DC systems.

Features:

• Conservatively rated diodes and a rustproof anodized aluminum heat sink case.
• Heavy-duty construction
• Rated for systems up to 48 volts DC, negative ground
• Rust-proof anodized aluminum case
• Stainless steel mounting hardware is provided
• Protective covers are provided for terminals

Specifications:

• Alternator Sources: 2
• Battery Bank: 3
• Max. Amperage Input Capacity: 120
• Stud Terminal Size: 6mm
• Dimensions (L x W x H): 12.5 x 4.5 x 3.1 inches
• Weight: 5 lbs.
• Operating Temperature: -40 to +80 degrees
• Duty Cycle: Continuous rating to 50 degrees C Derate linearly to 70% @ 80 degrees C.
• Temp. Rise: 5 degrees C at full rated current (mount vertically for optimum cooling)
• Voltage Drop: 0.7V @ 50% load, 0.9V @ full load

*Note: These battery isolators are not compatible with self-exciting alternators. The alternator must have an external excitation lead. Please consult the manufacturer of your alternator if you are unsure of your configuration

The Newmar Power 2-3-120 Battery Isolator is a robust solution designed for efficiently managing multiple batteries in heavy-duty applications. It automatically charges two alternator sources and three battery banks while preventing one battery from discharging into another, ensuring optimal power distribution. This isolator is suitable for 12-, 24-, or 36-volt negative ground DC systems, making it versatile for various vehicle and marine setups. Its conservative diode ratings and rustproof anodized aluminum heat sink case provide durability and reliable heat dissipation, even under demanding conditions. With heavy-duty construction and stainless steel mounting hardware, the 2-3-120 is built to withstand harsh environments and continuous operation. It is rated for systems up to 48 volts DC and features a continuous duty cycle at 50 degrees Celsius, with linear derating at higher temperatures. The device's low voltage drop of 0.7 volts at 50% load ensures minimal energy loss during operation, maintaining efficient power transfer. Its compact design and protective terminal covers facilitate safe installation and maintenance. Designed for external excitation alternators, it is not compatible with self-exciting models, so users should verify their alternator configuration prior to installation. The isolator's stainless steel hardware and corrosion-resistant aluminum case guarantee long-term reliability in demanding environments. Its temperature range from -40 to +80 degrees Fahrenheit allows use in extreme conditions, making it an ideal choice for marine, RV, and utility vehicles that require dependable battery management. Overall, the Newmar Power 2-3-120 Battery Isolator offers a durable, efficient solution for complex battery systems, providing peace of mind and optimal power management for heavy-duty applications.

Features:

• Conservatively rated diodes and rustproof anodized aluminum heat sink case for durability

• Heavy-duty construction designed for demanding environments

• Rated for systems up to 48 volts DC with negative ground configuration

• Rust-proof anodized aluminum case ensures corrosion resistance

• Includes stainless steel mounting hardware for secure installation

• Protective covers provided for terminal safety and insulation

• Compatible with dual alternator sources and multiple battery banks

• Low voltage drop of 0.7 volts at 50% load for efficient power transfer

• Operates reliably across a wide temperature range from -40 to +80 degrees Fahrenheit

• Designed for external excitation alternators, not compatible with self-exciting models