Newmar Power - 2-3-120 Battery Isolator
Got questions? Ask an expert!
Know someone who needs this?
Share it with your crew or mechanic.
Superior Battery Charging and Isolation Solution
The Newmar 2-3-120 Battery Isolator is an essential component for managing multiple battery systems onboard marine vessels. Engineered for efficiency and durability, this isolator ensures that each battery is charged according to its needs without the risk of overcharging or discharging into another battery. It is suitable for 12-, 24-, or 36-volt negative ground DC systems, making it versatile for various marine applications.
General Description
Designed to meet the rigorous demands of marine environments, the Newmar 2-3-120 Battery Isolator is built with conservatively rated diodes and housed in a rustproof anodized aluminum heat sink case. This heavy-duty isolator efficiently charges multiple batteries from one or two alternators, preventing any discharge between batteries. The robust construction ensures reliable performance and longevity, making it a valuable addition to any marine electrical system.
Key Features
- Efficient Charging: Automatically charges multiple batteries from one or two alternators.
- Prevents Battery Dumping: Stops the discharge of one battery into another, maintaining optimal charge levels.
- Durable Construction: Features a rust-proof anodized aluminum heat sink case and conservatively rated diodes.
- Versatile Compatibility: Suitable for systems up to 48 volts DC, negative ground.
- Complete Installation Kit: Includes stainless steel mounting hardware and protective covers for terminals.
Technical Specifications
- Alternator Sources: 2
- Battery Banks: 3
- Max. Amperage Input Capacity: 120 A
- Stud Terminal Size: 6mm
- Dimensions (L x W x H): 12.5" x 4.5" x 3.1"
- Weight: 5 lbs.
- 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
Installation and Use
The Newmar 2-3-120 Battery Isolator is designed for straightforward installation and reliable operation. It should be mounted vertically for optimal cooling. The provided stainless steel hardware ensures secure attachment, and the 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.