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Xmas Gift Idea Newmar 2-3-120 Battery Isolator [2-3-120] Holiday Edition [xkqhOiIw]

$49.99 $159.99 -69%

2-3-120 Battery IsolatorThis 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 o

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Xmas Gift Idea Newmar 2-3-120 Battery Isolator [2-3-120] Holiday Edition [xkqhOiIw]

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


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What Our Customers Say

February 1, 2026

Absolutely no complaints!

A fantastic product. I really, really, really, really love it.

- Gwydion X..

February 1, 2026

Absolutely no complaints!

An outstanding item with a very, very, very, very great build.

- Gwawl C..

February 1, 2026

Absolutely no complaints!

A great product with a very, very, very, very solid design.

- Beli O..

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