SKU: 62854632333

Newmar 2-3-120 Battery Isolator [2-3-120]

Sale price$266.85 Regular price$296.50
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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17

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Description

Newmar 2-3-120 Battery Isolator [2-3-120]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

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


Quick Guide (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 62854632333

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Amazon Customer
Massapequa, US
★★★★★ 5
Nice wallet.
Nice wallet. Been using it for a couple of years, no problems, other than there is never enough money in it!
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Reviewed in the United States on July 1, 2025
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Rodrigo
Birmingham, US
★★★★★ 5
Nice
Color: Khaki
Really nice wallet, love it!
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Reviewed in the United States on August 10, 2025
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Armando Espina
Charlottesville, US
★★★★★ 5
Bueno
Muy buen producto llevo un año usándola sin problemas
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Reviewed in the United States on December 26, 2025
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Vladimir
Alexandria, US
★★★★★ 5
Duradera
Excelente producto. La compre en el 2019 y aun la tengo en buen estado en diciembre 2025
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Reviewed in the United States on November 29, 2025
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Abestheman
Bozeman, US
★★★★★ 5
Looking too Good
Size: 9, Color: White/Black, Size: 9, Color: White/Black
‘When you look good, you feel good,’ and Polo RL does it right. Comfy, Classy, and Cool.
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Reviewed in the United States on May 9, 2026

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