Newmar Power - 1-2-120 Battery Isolator
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Seamless Charging for Multiple Batteries in Marine Environments
The Newmar 1-2-120 Battery Isolator is an essential component for managing multiple battery systems onboard marine vessels. Designed to allow simultaneous charging from one or two alternators, this heavy-duty isolator ensures that each battery charges according to its needs, preventing discharge from one battery into another. Its robust construction and advanced features make it ideal for 12-, 24-, or 36-volt negative ground DC systems.
The Newmar 1-2-120 Battery Isolator is built to meet the rigorous demands of marine environments. Featuring conservatively rated diodes and a rust-proof anodized aluminum heat sink case, this isolator offers durability and reliability. It efficiently charges multiple batteries while preventing overcharging, ensuring optimal performance and longevity of your battery system. This model supports a 120-amp alternator, making it a powerful solution for marine power management.
Key Features
- Efficient Charging: Allows automatic charging of multiple batteries from one or two alternators.
- Prevent Battery Dumping: Ensures that one battery does not discharge into another.
- Heavy-Duty Construction: Rust-proof anodized aluminum case with conservatively rated diodes.
- Versatile Compatibility: Rated for systems up to 48 volts DC, negative ground.
- Complete Installation Kit: Includes stainless steel mounting hardware and protective covers for terminals.
Technical Specifications
- Operating Temperature: -40 to +80°C
- Duty Cycle: Continuous rating to 50°C; derates linearly to 70% at 80°C
- Temperature Rise: 5°C at full rated current (mount vertically for optimum cooling)
- Voltage Drop: 0.7V at 50% load, 0.9V at full load
- Alternator Sources: 1
- Battery Bank: 2
- Max. Amperage Input Capacity: 120 A
- Stud Terminal Size: 6mm
- Dimensions: 6.5" x 4.5" x 3.1"
- Weight: 3 lbs
Installation and Use
The Newmar 1-2-120 Battery Isolator is designed for easy installation and reliable operation. Mounting it vertically optimizes cooling, and the provided stainless steel hardware ensures secure attachment. Protective covers for terminals enhance safety and longevity.
Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.
Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.
Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.
Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.
Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.
Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.
To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.
We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.