Description
Newmar 1-3-165 Battery Isolator | Boat Supply Store
Efficiently manage multiple battery banks in demanding marine environments with this heavy-duty Newmar Power isolator. It supports a single 165A alternator source for up to three independent battery banks, ensuring each receives optimal charge without inter-battery discharge. Operating across 12-, 24-, or 36-volt negative ground DC systems up to 48 volts DC, its robust anodized aluminum heat sink case measures 9 x 4.5 x 3.1 inches, providing reliable long-term performance.
Key Features
- Automatically charges multiple batteries from one or two alternators
- Prevents discharge or 'dumping' of one battery into another
- Charges each battery independently based on its need, preventing overcharging
- Rated for 12-, 24-, or 36-volt negative ground DC systems (up to 48 volts DC)
- Conservatively rated diodes ensure extended lifespan
- Rustproof anodized aluminum heat sink case for superior thermal management
- Heavy-duty construction for marine and mobile applications
- Includes stainless steel mounting hardware and protective terminal covers
Specifications
| Product Specifications | |
|---|---|
| Alternator Sources | 1 |
| Battery Banks | 3 |
| Maximum Amperage Input Capacity | 165A |
| Terminals | 6mm stud |
| System Voltage Rating | 12-, 24-, or 36-volt negative ground DC (up to 48 volts DC) |
| Dimensions | 9 x 4.5 x 3.1 inches |
| Weight | 5 lbs |
| Operating Temperature | -40 to +80 degrees Celsius |
| Continuous Rating | to 50 degrees C (derates linearly to 70% at 80 degrees C) |
| Voltage Drop | 0.7V at 50% load, 0.9V at full load |
| Alternator Compatibility | Not compatible with self-exciting alternators (requires external excitation lead) |
Who This Is For
Boat owners, RV enthusiasts, and off-grid power system users requiring efficient charging of multiple battery banks from a single or dual alternator setup. This unit ensures independent charging and protection for each battery bank.
How It Compares
| Feature | Newmar 1-3-165 Battery Isolator | Competitor |
|---|---|---|
| Max Amperage Input Capacity | 165A | 120A, 160A |
| Battery Bank | 3 | 2, 3 |
| Max System Voltage | 48V DC | 24V DC, 24V DC |
| Heat Sink Material | Anodized Aluminum | Anodized Aluminum, Anodized Aluminum |
| Alternator Sources | 1 | 1, 1 |
Common Concerns Answered
What if my alternator is self-exciting?
This Newmar 1-3-165 Battery Isolator is not compatible with self-exciting alternators and requires an external excitation lead. Ensure your alternator setup can accommodate this requirement for proper functionality.
What is the return policy for this product?
Products requiring direct manufacturer contact for issues cannot be returned to the point of purchase. Please ensure product compatibility before purchase and consult the manufacturer directly for any service or warranty claims.
How reliable is this isolator in harsh conditions?
The Newmar 1-3-165 features robust, heavy-duty construction with conservatively rated diodes and an anodized aluminum heat sink, specifically designed for reliable, long-term performance in demanding marine and mobile environments.
Frequently Asked Questions
What is a battery isolator and how does it work?
A battery isolator allows a single alternator to charge multiple battery banks independently. It uses diodes to direct charging current to each battery bank while preventing current from flowing between them, thus stopping one discharged battery from draining another.
Can this battery isolator be used with self-exciting alternators?
No, the Newmar 1-3-165 Battery Isolator is not compatible with self-exciting alternators. It requires an external excitation lead on the alternator for proper operation.
What is the maximum voltage and amperage this isolator can handle?
This isolator has a maximum input amperage capacity of 165A and is rated for 12-, 24-, or 36-volt negative ground DC systems, supporting up to 48 volts DC.
How do I install a Newmar 1-3-165 Battery Isolator?
Installation involves connecting the alternator's output to the isolator's input terminal and then connecting the isolator's output terminals to each respective battery bank. Proper wire sizing and secure connections are crucial. Refer to the included manual for detailed instructions and safety precautions. Professional installation is recommended if you are not familiar with DC electrical systems.
What is the voltage drop across this isolator at different loads?
The voltage drop across the Newmar 1-3-165 is approximately 0.7V at 50% load and 0.9V at full load. This value accounts for the energy loss within the isolator's diodes.