Brand: Newmar Power
Newmar Power 2-3-120 Battery Isolator, 120 Amp, 2 Alternator Sources and 3 Battery Banks
Newmar Power 2-3-120 Battery Isolator, 120 Amp, 2 Alternator Sources and 3 Battery Banks
2 available
About this product
Newmar Power 2-3-120 Battery Isolator manages charging from up to two alternator sources across three battery banks while helping prevent one battery from discharging into another. It is intended for negative-ground DC systems and supports 12-, 24-, 36-, and up to 48-volt systems as specified by the vendor.
- Maximum amperage input capacity: 120 amp
- Alternator sources: 2
- Battery banks: 3
- System rating: negative-ground DC systems up to 48 volts
- Construction: anodized aluminum heat-sink case with conservatively rated diodes
- Included: stainless steel mounting hardware and protective terminal covers
- Stud terminal size: 6mm
- Dimensions: 12.5 x 4.5 x 3.1 in.
- Weight: 5 lb.
- Operating temperature: -40 to +80 degrees
- Duty cycle: continuous rating to 50 degrees C; derates linearly to 70% at 80 degrees C
- Temperature rise: 5 degrees C at full rated current; vertical mounting is recommended for optimum cooling
- Voltage drop: 0.7V at 50% load and 0.9V at full load
- Manufacturer part number: 2-3-120
Compatibility note: This isolator is not compatible with self-exciting alternators. The alternator must have an external excitation lead; consult the alternator manufacturer if the configuration is uncertain.
Manuals & videos
- Secure checkout
- 21-day return requests
- Free standard shipping $100+
Product facts
- CT SKU
- CT-114360
- Model / MPN
- 2-3-120
- Package dimensions (H × W × L)
- 4" X 5" X 13"
- Package weight
- 5.25 lb
Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.
Shipping & returns
Shipping & returns
Request an eligible return within 21 calendar days after delivery. Every physical return requires written approval and an RMA number and must be shipped within five business days after the RMA is issued. The customer pays return shipping for an ordinary return. Tug & Tow provides prepaid return shipping for a verified damaged, defective, short, or incorrect shipment. We do not charge a restocking fee. See Shipping & Returns for eligibility, exclusions, and details.
Fit & compatibility
Fit & compatibility
Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.
Need help choosing?
Need help choosing?
Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.
