Swift Kompany 8720-1530 XD Flex 2 Dual Relay/VSR Battery Switch

The Swift Kompany 8720-1530 is an XD Flex 2 dual relay switch with voltage sensing relay (VSR) capability. It is also called a dual battery switch, battery isolator relay, or remote battery disconnect. It puts two high-amp bi-stable relays in one compact housing, so it can replace two separate relays in marine, RV, and vehicle dual-battery systems.

Key Features:

• Two relay positions in a single module, each configurable by dip switch as a simple remote battery disconnect relay or as a voltage sensing relay (VSR)
• Rated for 500 amps continuous per relay
• Auto-ranging input voltage of 8 to 36 VDC, for 12V and 24V systems
• Bi-stable design with very low off-state current draw of about 1.3 mA
• Mechanical switching life of 1,000,000 cycles
• Integrated thermal overload protection
• Sealed construction, so it can be mounted in a wide range of locations
• Remote ON/OFF/Auto control inputs, plus local and remote LED indicator outputs for each relay
• Stainless steel self-locking hardware, with a terminal stud torque of 120 in-lbs

In VSR mode, the relay closes automatically when the system voltage shows the alternator is charging. It opens again when the voltage drops. This shares charge current between batteries and protects the starting battery from deep-cycle loads. The Flex 2 dip switch settings let installers adjust the on and off trigger voltages for the application.