Mastervolt Battery Mate 1603 IG Isolator — 120A, 3 Bank

The Battery Mate 1603 IG Isolator provides simultaneous charging for up to three battery banks from a single alternator or battery charger. Its electronic MOSFET-based design reduces voltage drop between the alternator and output banks, delivering fast, full-charge performance without requiring adjustments to the alternator. Compatible with any type of alternator or charger, it remains effective in both new and existing installations. The input is connected to the alternator or charger, while two batteries are connected to the output side; the third bank is managed within the device for balanced charging.

Performance and electrical characteristics: Continuous amperage 120 A; 3-bank configuration; negligible voltage loss, enabling efficient charging across all connected banks. The MOSFET-based isolation provides dynamic voltage compensation so all banks reach and hold the correct charging voltage even as state of charge differs between banks.

• Input: connection to alternator and/or battery charger
• Output: connections to two battery banks (three-bank capability via internal management)
• Mechanical: DIN rail mounting; enclosure 4\"H x 6\"W x 10\"L; weight 2.7 lb
• IG contact option for external excitation or voltage sensing

Safety and regulatory information: This product carries a California Prop 65 warning for di(2-ethylhexyl)phthalate (DEHP). For details, see P65Warnings.ca.gov.

Installation and maintenance: Install on a DIN rail in an appropriate enclosure with adequate ventilation. Use correctly sized wiring for the input and each output connection. Torque and routing should follow the guidelines in the Quick Guide (pdf) and Owner's Manual (pdf) included with the product.

Documentation: Quick Guide (pdf) • Owner's Manual (pdf)

Battery Mate 1603 IG Isolator - 120 Amp, 3 Bank

The Battery Mate is the ultimate solution for charging several batteries simultaneously and is compatible with any type of alternator/battery charger, in both existing and new systems. As the voltage loss between the alternator and battery is negligible, the Battery Mate performs far better than conventional battery isolators. This ensures fast and complete charging of your batteries without having to make additional adjustments to the alternator.

While battery isolators are conventional diode splitters, the Battery Mate's technology is electronic and includes mosfets (transistors). Its components compensate for variations in voltage and ensure that charging continues at the right voltage level, even with several battery banks. The input side on the Battery Mate is connected to the alternator and/or battery charger, while two batteries are connected to the output side. The Battery Mate is easy to install on a DIN rail (industry standard).The Mastervolt Battery Mate can be used in any application even if the standard alternator need external excitation or voltage sensing. In this case the additional IG contact can be connected.

WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

Specifications:

• Continuous Amperage: 120
• Box Dimensions: 4"H x 6"W x 10"L WT: 2.7 lbs
• UPC: 816882021046