Product Description Precision Battery Voltage Controller with Relay Protection Key Features and Benefits: Compact Size: Measuring 57 x 42 x 19 mm (2.24 x 1.65 x 0.75 inches), fits easily into most setups without taking up unnecessary space. Wide Input Voltage Range: Operates on DC 1236V for flexible integration with various battery systems. Accuracy: Voltage measurement precision of ±0.1V for reliable monitoring. Low Power Consumption: Less than 1.5W, ensuring minimal draw from your battery. Safety Limit: Builtin maximum current safeguard of 20A before breaker trips. Protects Battery Life and Prevents OverDischarge: Configurable discharging mode allows you to set a disconnect point at a specific voltage, automatically cutting off battery output to avoid harmful overdischarge. Extends battery lifespan by ensuring voltage never drops to damaging levels. Note: Relay is for switching only and does not feature a full power cutoff. To fully stop current draw after disconnect, manually switch off the power supply. Simple and Reliable Operation: Easy reset to factory defaults: power off the device, press and hold both buttons, power on, and observe the '888' display to confirm reset. Default protection value is 12V with a 2V difference range between disconnection and reconnection. Example: Disconnect occurs at 12V, reconnect at 14V. Retains user settings even after an unexpected power loss, preventing downtime and saving configuration efforts. Wide Application Scope: Designed for switching output on and off via relay control without altering voltage. Compatible with leadacid, lithiumion, and solar panel batteries. Not suitable for use with battery packs. Practical Use Scenarios: 1. Offgrid solar installations: Automatically disconnects storage batteries before they are overdischarged, maintaining longterm capacity. 2. RV or marine battery systems: Keeps auxiliary batteries operating safely while avoiding deep discharge during extended use. 3. Small DCpowered projects: Provides accurate voltage monitoring and protection for devices powered directly from rechargeable batteries. This versatile and compact battery voltage controller is engineered for users who need dependable protection, precise monitoring, and flexible integration into a variety of DC electrical systems.