Sterling’s Voltage Sensitive Relays automatically link and disconnect battery banks based on voltage thresholds, ensuring simple, smart battery management without requiring an ignition feed. The relay activates when the primary bank exceeds 13.3V, assuming charging is active, and disconnects below 12.9V to prevent backfeed and protect the starter battery.
Key Features:
Automatic bi-directional or single-direction charging.
Handles alternator, battery charger, or wind generator inputs.
Progressive disconnect algorithm ensures stable transitions under load.
Auto-senses 12V or 24V systems.
IP65 waterproof and ignition protected.
Built-in back EMF suppression and remote LED monitoring.
Surge rated and supports adjustable voltage parameters.
Why Sterling’s VSR?
Unlike conventional relays that can fail under high load disconnects, Sterling VSRs feature advanced spark arresters and current limiting technology to protect both the relay and your system. Suitable for boats, vehicles, and off-grid setups where automatic battery management is essential.
Choosing the Right Model:
Match relay continuous rating to alternator or charger output.
Allow safety margin — e.g., for an 80A alternator, use a 160A relay.
Use ignition feed models if ignition access is easy, or voltage sensing for simpler installs.
Current-limiting versions are recommended for systems with high peak loads like winches or large inverters.
