Newmar 1-2-70A Isolator 1AIT 2BATT 70AMP
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Newmar 1-2-70A Isolator 1AIT 2BATT 70AMP Product Description
Upgrade your power system with the reliable Newmar 1-2-70A battery isolator, designed to seamlessly charge two battery banks from a single alternator source. This heavy-duty unit prevents one battery from draining into another, ensuring your starting battery stays ready while fully charging your house or auxiliary bank. Perfect for demanding environments like marine vessels, RVs, and off-grid setups, it intelligently prioritizes charging based on each battery's needs without risking overcharge.
Built for real-world reliability, the 1-2-70A handles 12-48V negative ground DC systems and supports up to 70 amps, making it ideal for alternators in that range. Its diode-based design offers straightforward operation—no relays to fail, no complex electronics to troubleshoot.
How the Newmar 1-2-70A Battery Isolator Works
When your engine runs and the alternator kicks in, power flows through high-efficiency diodes to both batteries. The isolator blocks reverse current, so if your house battery is in use (like running lights or appliances), it won't pull from the starting battery. This setup extends battery life, reduces alternator wear, and keeps you powered without interruptions. Mount it vertically for best heat dissipation, and you're set for years of trouble-free service.
Standout Features for Long-Lasting Performance
- Rugged Build: Heavy-duty construction withstands vibration, moisture, and extreme conditions.
- Wide Voltage Compatibility: Operates smoothly from 12V to 48V DC systems.
- Corrosion-Resistant Housing: Anodized aluminum case fights rust in harsh marine or outdoor settings.
- Secure Mounting: Includes stainless steel hardware for easy, durable installation.
- Safety First: Terminal covers protect against shorts and accidental contact.
- Proven Diode Tech: Conservatively rated for continuous duty without overheating.
Detailed Performance Specifications
Engineered for efficiency and durability:
- Operating Temperature: -40°C to +80°C
- Duty Cycle: Continuous at 50°C; derates linearly to 70% at 80°C
- Temperature Rise: 95°C max at full rated current (vertical mounting recommended)
- Voltage Drop: 0.7V at 50% load; 0.9V at full load
| Model | Alternator Sources | Battery Banks | Max Input Capacity (Amps) | Weight (lbs/kg) | Dimensions (L x W x H inches) |
|---|---|---|---|---|---|
| 1/2/70A | 1 | 2 | 70 | 2 / 0.9 | 3.25 x 4.5 x 3.1 |
Why Choose This Isolator for Your Setup?
Unlike solenoid-based switches that can stick or wear out, diode isolators like the Newmar 1-2-70A provide passive, always-on protection with minimal voltage drop. Users in boating forums rave about its simplicity—no programming, no buttons to fail. It's a go-to for separating cranking and deep-cycle batteries in RVs, yachts, work trucks, and solar-hybrid systems. Pair it with your alternator for balanced charging that maximizes runtime and reliability.
Common Applications
- Marine: House batteries for electronics, starting for engines
- RV/Motorhome: Auxiliary power without draining the chassis battery
- Off-Road/4x4: Dual setups for winches and camping gear
- Industrial: Backup power isolation
Quick Installation Insights
Connect the alternator output to the common terminal, then route to each battery bank. Use appropriately sized cables (at least 6 AWG for 70A) and fuses near batteries for safety. Vertical mounting enhances cooling—keep it away from exhaust heat. Test by checking voltage at each bank with the engine running and off. It's plug-and-play for most setups, saving hours compared to custom wiring.
Frequently Asked Questions
What does the 1-2-70A designation mean?
It indicates 1 alternator input charging 2 battery banks at up to 70 amps continuous rating.
Is this isolator suitable for 24V or 48V systems?
Yes, it's rated for 12-48V negative ground DC systems, making it versatile for various vehicles and vessels.
How does it prevent battery discharge?
Diodes block reverse current flow, so one battery can't drain into another when the alternator is off.
What's the voltage drop like under load?
Expect 0.7V at 50% load and 0.9V at full 70A—minimal impact on charging efficiency.
Can it handle high-heat environments?
Absolutely, with an operating range of -40°C to +80°C and built-in heat sinking for continuous duty.
Is mounting hardware included?
Yes, stainless steel hardware and protective terminal covers are provided for secure, safe installation.
Does it work with lithium batteries?
It pairs well with lead-acid and AGM; for lithium, ensure your alternator and charging profile match to avoid issues.
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| Performance Specifications Operating temper ature: -40 to +80°C
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These heavy-duty isolators allow automatic charging of multiple batteries from one or two alternators and prevent one battery from discharging or "dumping" into another. ...
Frequently Asked Questions (FAQ) About Newmar 1-2-70A Isolator 1AIT 2BATT 70AMP
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Newmar 1-2-70A Isolator 1AIT 2BATT 70AMP Technical Specifications
| Type: | |
|---|---|
| Vendor: |
NewMar |
| Weight: |
3.0 lb |
Newmar 1-2-70A Isolator 1AIT 2BATT 70AMP User Reviews
Newmar 1-2-70A Isolator 1AIT 2BATT 70AMP Shipping & Return
| Shipping Weight: |
3.0 lb |
|---|---|
| Box Sizes: |
1.00 (h) x 1.00 (w) x 1.00 (l) |
| Cubic Feet: |
1.0 |
| Returnable: |
Yes |
| USPS First Class: |
Yes |
| P65: |
Yes |
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