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NewMar 1-3-70 Battery Isolator 70 Amp 3 Bank Marine RV

Manufacturer

NewMar

<h3>About NewMar Power</h3><p>Founded in 1970 and headquartered in Costa Mesa, California, <strong>NewMar Power</strong> has spent more than five decades earning a reputation as one of the most trusted names in DC power technology. From the marine deck to the telecom rack, NewMar designs and manufactures power solutions built to perform when reliability is not optional. Today, NewMar operates as part of Mission Critical Electronics (MCE), a family of specialized power brands serving critical infrastructure, public safety, transportation, and industrial automation markets worldwide.</p><h3>A Complete DC Power Ecosystem</h3><p>What sets NewMar apart is the breadth and depth of its DC power portfolio. The brand offers an extensive lineup that spans <a href="/11280-newmar-battery-chargers-200141">battery chargers</a>, DC power systems, hot swap rectifiers, power conversion equipment, DC UPS solutions, DIN rail power, and DC power distribution — essentially everything needed to design, deploy, and maintain a robust DC power infrastructure. Whether the application is a commercial fishing vessel, a first-responder communications vehicle, a cellular network installation, or an industrial automation system, NewMar has purpose-engineered solutions to match.</p><p>NewMar&apos;s <a href="/11280-newmar-vehicle-battery-2476">vehicle batteries</a> and battery management products reflect the same engineering philosophy: deliver clean, stable power under demanding real-world conditions. Their smart charging algorithms, temperature compensation, and multi-stage charge profiles help extend battery life and protect sensitive electronics — critical considerations in marine and mobile environments where a power failure can mean more than just an inconvenience.</p><h3>Engineering Quality and Industry Certifications</h3><p>As an ISO 9001-certified facility, NewMar maintains a rigorous Quality Management System ensuring that every product consistently meets both customer expectations and applicable regulatory requirements. This commitment to process discipline translates directly into field reliability — a reason why NewMar products are found aboard emergency vehicles, in telecom huts, on offshore vessels, and throughout wireless network infrastructure across North America and beyond.</p><p>With over 50 years of engineering experience and a track record of delivering customized power system designs, NewMar continues to be the go-to partner for integrators and engineers who need dependable DC power — right out of the box and for years into the future.</p><h3>Industries Served</h3><ul style="list-style:disc"><li><strong>Marine</strong> — Shore power chargers, inverter/chargers, and DC distribution for recreational and commercial vessels</li><li><strong>Telecommunications &amp; Wireless Networks</strong> — Rectifiers, DC UPS, and power systems for tower sites and network huts</li><li><strong>Public Safety &amp; Land Mobile</strong> — Mobile DC power stabilizers and battery backup for emergency response vehicles</li><li><strong>Industrial &amp; Automation (IIoT)</strong> — DIN rail power supplies and rugged power conversion for factory and field automation</li></ul>

Part Number

1-3-70
09/12/2036 6:21 AM
Sale Price

$204.39

1 left at this price

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Usually delivered within 2 days

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Product Details

The NewMar 1-3-70 is a heavy-duty battery isolator designed to charge multiple batteries automatically from a single alternator while preventing discharge between battery banks. This professional-grade isolator ensures each battery is charged according to its individual needs without overcharging, making it ideal for marine, RV, and commercial vehicle applications with 12V, 24V, or 36V negative ground DC systems.

Key Features:

  • Conservatively rated diodes with rustproof anodized aluminum heat sink for maximum durability
  • Heavy-duty construction designed for continuous operation in harsh environments
  • Compatible with systems up to 48 volts DC, negative ground
  • Corrosion-resistant anodized aluminum case for marine and outdoor use
  • Includes stainless steel mounting hardware and protective terminal covers
  • Vertical mounting orientation provides optimum cooling performance

Technical Specifications:

  • Alternator Inputs: 1 source
  • Battery Banks: 3 isolated outputs
  • Maximum Amperage: 70 amps continuous
  • Terminal Studs: 6mm threaded
  • Dimensions: 3.25" L × 4.5" W × 3.1" H
  • Weight: 2 lbs
  • Operating Temperature: -40°F to +176°F (-40°C to +80°C)
  • Duty Cycle: Continuous to 122°F (50°C), derate linearly to 70% at 176°F (80°C)
  • Temperature Rise: 9°F (5°C) at full rated current with vertical mounting
  • Voltage Drop: 0.7V at 50% load, 0.9V at full load

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

good prices and easy ordering

Searching for parts and ordering was quick and easy. All parts were in stock.

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Easy peasy

fast and a good price

It was okay. Shipping was expensive w/o discount.

great place to shop!!

Quick

Excellent

Simple and easy so far

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good so far.

I was genuinely impressed with their price for my item and truly happy with the speed of their shipping. I'll definately look forward to buying from Autoplicity in the future!

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