This 120-amp battery isolator is designed to enhance alternator performance and extend battery life in dual or multi-battery systems. By regulating current distribution, it ensures safe, efficient charging of both the starting and auxiliary batteries without cross-drain. Ideal for automotive, marine, and RV applications.

Specifications & Features

• Amperage Capacity: 120 amps
• Voltage Compatibility: 6V, 12V, 24V, 36V, 48V, 50V
• Application: Alternators with output below 120 amps
• Function: Prevents auxiliary battery drain on the starting battery
• Supports DC-to-DC charging between vehicle and accessory batteries
• Simultaneously charges multiple batteries based on state of charge
• Helps extend battery lifespan by optimizing charge distribution
• Dimensions: 6-1/2″ L x 4-1/2″ W x 3″ H (excluding bolts)
• Quantity: 1 isolator

Application Notes

• Choose an isolator rated above your alternator’s output to prevent damage during operation.
• Prevents battery drain by isolating the starting battery from the accessory battery.
• Maintains reliable starting power even if the auxiliary battery is low.
• Supports simultaneous charging of both batteries to save time and improve efficiency.
• Smart current distribution charges each battery based on its state of charge for optimal performance and extended lifespan.