Optimized Battery Charging for Marine Environments

The Newmar 1-3-70 Battery Isolator is a robust and efficient solution designed to manage the charging of multiple batteries onboard marine vessels. By enabling automatic charging from one or two alternators, this isolator ensures each battery is charged according to its needs without the risk of overcharging or discharging into another battery. Ideal for 12-, 24-, or 36-volt negative ground DC systems, this isolator is perfect for various marine applications.

General Description

Built for durability and reliability, the Newmar 1-3-70 Battery Isolator features conservatively rated diodes and a rustproof anodized aluminum heat sink case. This heavy-duty construction ensures long-term performance and protection against harsh marine conditions. By preventing the discharge of one battery into another, it maintains optimal charge levels and extends battery life.

Key Features

• Efficient Multi-Battery Charging: Allows automatic charging of multiple batteries from one or two alternators.
• Prevents Battery Dumping: Ensures no discharge from one battery to another, maintaining optimal charge levels.
• Durable Construction: Rustproof anodized aluminum heat sink case and conservatively rated diodes for long-lasting use.
• Versatile Compatibility: Suitable for systems up to 48 volts DC, negative ground.
• Complete Installation Kit: Includes stainless steel mounting hardware and protective terminal covers.

Technical Specifications

• Alternator Sources: 1
• Battery Banks: 3
• Max. Amperage Input Capacity: 70 A
• Stud Terminal Size: 6mm
• Dimensions (L x W x H): 3.25" x 4.5" x 3.1"
• Weight: 2 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 1-3-70 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 terminal covers enhance safety and longevity.