NewMar 23120 Battery Isolator 2 Alternator 3 Bank 120 Amp

The NewMar 23120 is a heavy-duty battery isolator designed to charge multiple batteries automatically from one or two alternators while preventing battery discharge or 'dumping' between banks. This professional-grade isolator ensures each battery is charged according to its specific needs without overcharging, making it ideal for marine, RV, and commercial vehicle applications with 12V, 24V, or 36V negative ground DC systems.

Key Features:

• Dual alternator inputs support charging from two independent sources
• Three isolated battery bank outputs for flexible system configuration
• 120 amp maximum input capacity for high-output charging systems
• Conservatively rated diodes with rustproof anodized aluminum heat sink case for reliable heat dissipation
• Heavy-duty construction rated for continuous duty in demanding environments
• Compatible with 12V, 24V, 36V, and up to 48V DC negative ground systems
• Stainless steel mounting hardware and protective terminal covers included

Technical Specifications:

• Alternator Sources: 2
• Battery Banks: 3
• Maximum Amperage Input: 120A
• Stud Terminal Size: 6mm
• Voltage Drop: 0.7V at 50% load, 0.9V at full load
• Operating Temperature Range: -40°F to +176°F (-40°C to +80°C)
• Temperature Rise: 5°C at full rated current (vertical mounting recommended)
• Duty Cycle: Continuous to 122°F (50°C), derate linearly to 70% at 176°F (80°C)
• Dimensions: 12.5" L x 4.5" W x 3.1" H
• Weight: 5 lbs

Important Compatibility Note: This battery isolator is not compatible with self-exciting alternators and requires alternators with an external excitation lead. Consult your alternator manufacturer if you are unsure about your configuration.