The VSR Voltage Sensitive Relay with Starter Isolator is an essential device for marine battery management, allowing simultaneous charging of two batteries while protecting your starter battery from discharge. Designed to optimize battery performance and ensure reliable engine starts, this relay automatically connects and isolates batteries based on voltage levels without any voltage drop.

• Automatically closes contact to charge both batteries once the starter battery reaches 13.7/27.0 V
• Isolates the starter battery when its voltage drops to prevent draining and guarantee engine starting power
• No voltage drop during charging for efficient power transfer
• Protects starter battery from discharge caused by onboard services
• Low standby absorption current of just 0.5 mA
• LED indicator shows VSR status and supports automatic 12/24 V selection
• Start Isolation feature temporarily isolates batteries during engine startup to safeguard onboard electronics
• Optional ABE (Additional Battery Equalization) mode extends charging time at idle by lowering disconnection voltage levels
• Optional Storage Mode reduces current consumption to zero when the engine is off for energy saving
• Manual ON-OFF operation available for user control
• Front 10 mm contacts allow easier installation and include a transparent protective cover