Newmar 2-3-120 Battery Isolator
Condition: New
Free Ground Shipping*
Newmar 2-3-120 Battery Isolator
2-3-120 Battery Isolator
This heavy-duty isolator allows charging multiple batteries automatically from one or two alternators and prevents the discharge or ‘dumping” of one battery into another. Each battery is charged according to its need without overcharging and is rated for 12-, 24-, or 36-volt negative ground DC systems.
Features:
- Conservatively rated diodes and a rustproof anodized aluminum heat sink case.
- Heavy-duty construction
- Rated for systems up to 48 volts DC, negative ground
- Rust-proof anodized aluminum case
- Stainless steel mounting hardware is provided
- Protective covers are provided for terminals
Specifications:
- Alternator Sources: 2
- Battery Bank: 3
- Max. Amperage Input Capacity: 120
- Stud Terminal Size: 6mm
- Dimensions (L x W x H): 12.5 x 4.5 x 3.1 inches
- Weight: 5 lbs.
- Operating Temperature: -40 to +80 degrees
- Duty Cycle: Continuous rating to 50 degrees C Derate linearly to 70% @ 80 degrees C.
- Temp. Rise: 5 degrees C at full rated current (mount vertically for optimum cooling)
- Voltage Drop: 0.7V @ 50% load, 0.9V @ full load
*Note: These battery isolators are not compatible with self-exciting alternators. The alternator must have an external excitation lead. Please consult the manufacturer of your alternator if you are unsure of your configuration
Manufacturer Part Number: 2-3-120
| Special Shipping Message | Free Ground Shipping* |
|---|---|
| Manufacturer Part Number: | 2-3-120 |
Return Policy
Hodges Marine accepts returns for up to thirty (30) days after shipment. Our return policy does not apply to the following goods: Open software, mapping/chart data cards, programmed AIS units, opened/registered KVH Starlink products, trolling motors, international orders, freight truck only items, and special order items. These items are not eligible for return, refund or exchange. Shipping charges (if any) are non-refundable. If your return is accepted by Us, We will provide one of the following within a reasonable time: an exchange of merchandise for the item returned, a non-transferable merchandise credit, a credit to the payment card or original method of payment used to pay for the item, a check, or another remedy that we determine in good faith is appropriate in the circumstances. Customer must request a return merchandise authorization (RMA) through the product returns link on our website or by emailing us at [email protected]. A RMA number will be issued with instructions for returning the package within a reasonable time (normally 1-3 business days).
Defective Products:
A prepaid return shipping label will be provided for defective items if deemed necessary by the manufacturer. The customer must first contact the manufacturer for technical support to confirm product is defective and that product replacement is deemed necessary. Please provide the name of the technician, serial number, and details about the defect. Return instructions and a label will be provided.
Non-Defective Returns:
Eligible non-defective products may be returned for a full refund minus shipping paid (if any). To be eligible for a non-defective return, your merchandise must be unused/unopened and must be in the original packaging. Non-defective returns that show signs of installation/use, missing parts/packaging, missing proof of purchase/UPC code, or have serial numbers that do not match our records will not be accepted. Customer is responsible for return shipping costs of non-defective returns. You should consider using a trackable shipping service or purchasing shipping insurance for items of value. Hodges Marine is not liable for lost or damaged return packages.
General - Cancellations, Shipping Damage, Missing Packages, Shipment Refusals:
Orders that you submit online are processed immediately and may not be cancelled, and you may need to wait until you receive the merchandise in order to return it. Claims of shipment damage, incorrect/missing items, or non-receipt of goods must be made within seven (7) days. Customer is responsible for all costs associated with refused shipments or return to sender (RTS) shipments including carrier fees, freight to the customer, and return freight. We reserve the right to refuse returns that are sent COD, without a return authorization, show signs of undisclosed installation/use, has missing parts/packaging, missing proof of purchase/UPC code, or have serial numbers that do not match our records. If you do not comply with any of the above conditions, We reserve the right to refuse the return/exchange, or to impose different or additional conditions. Please see our TERMS AND CONDITIONS for additional applicable information.
Last Updated: JUNE 09 2026
Please email us at [email protected] or use the product returns link.
