Newmar 1-2-120 Battery Isolator

Ensure reliable and efficient power management on your vessel with our high-performance 1-2-120 Battery Isolator. Designed specifically for marine and boating applications, this robust isolator seamlessly manages multiple batteries, allowing them to charge simultaneously from one or two alternators while preventing unwanted discharge between batteries. Whether you’re embarking on a short trip or a long voyage, our battery isolator ensures each battery receives the appropriate charge, enhancing the longevity and performance of your boat’s electrical system.

Key Features

• Durable, corrosion-resistant anodized aluminum heat sink case with conservatively rated diodes
• Heavy-duty construction built to withstand marine environments
• Compatible with 12V, 24V, and 36V negative ground DC systems, up to 48 volts
• Rust-proof anodized aluminum casing for enhanced durability
• Includes stainless steel mounting hardware for secure installation
• Protective terminal covers to safeguard connections against moisture and corrosion

Technical Specifications

Specification	Details
Operating Temperature	-40°C to +80°C (-40°F to +176°F)
Duty Cycle	Continuous rating to 50°C; derated linearly to 70% at 80°C
Temperature Rise	5°C at full rated current (mount vertically for optimal cooling)
Voltage Drop	0.7V at 50% load, 0.9V at full load
Alternator Sources	1
Battery Bank	2
Maximum Amperage Input Capacity	120A
Stud Terminal Size	6mm
Dimensions (L x W x H)	6.5" x 4.5" x 3.1"
Weight	3 lbs.

Installation and Mounting

Our 1-2-120 Battery Isolator is designed for straightforward installation in marine environments. The package includes stainless steel mounting hardware, ensuring a secure and corrosion-resistant setup. For optimal performance, mount the isolator vertically to facilitate proper cooling and maintain a stable temperature during continuous operation.

Compatibility

This battery isolator is suitable for marine applications requiring robust and reliable power management. It is compatible with 12V, 24V, and 36V negative ground DC systems and can handle up to 48 volts DC. Please note that it is designed for use with alternators that have an external excitation lead.

Important Note

Our battery isolators are not compatible with self-exciting alternators. Ensure that your alternator is equipped with an external excitation lead. If you are uncertain about your alternator’s configuration, please consult the manufacturer to verify compatibility.

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.