XH-M609 DC 12-36V Battery Undervoltage Protection Module, Over-Discharge Protection Board with Digital Display, Low Voltage Cut Off Protector(2-Pack)

The XH-M609 low-voltage cutoff module precisely monitors battery voltage. When voltage drops below the preset protection threshold, it automatically disconnects the circuit to prevent battery damage from excessive discharge, significantly extending battery life. After disconnection, power automatically resumes when voltage recovers to “protection voltage + hysteresis voltage.” Note: When the battery powers the module, the output voltage remains equal to the battery voltage while the relay is closed. Therefore, both the module's operating voltage and the battery voltage must exceed 7V. Operating Voltage Range: Compatible with wide-voltage DC systems, supporting 12V/24V/36V applications. Load Capacity: A robust 20A relay directly controls most small to medium-sized electrical devices. User-Friendly Interface: All complex settings are managed via a clear LED display and intuitive “+” and “-” buttons, featuring straightforward and easy-to-understand operation logic. 【Setup Guide】 Set Protection Voltage: Press “+” Display current value Double-press “+” (decimal point flashes) Adjust with“+” Auto-save after 3 seconds. Set Hysteresis Voltage: Press “–” Display current value Double-press “–” (decimal point flashes) Adjust with “+/–” Auto-save after 3 seconds. Voltage Calibration: Press and hold the “+” 3 seconds Voltage flashes Calibrate using the “+” Automatically saves after 3 seconds. Set Start Delay: Press and hold the “–” 3 seconds Time flashes Adjust using the “+/–” Automatically saves after 3 seconds. Restore Factory Settings: Simultaneously press and hold the “+” and “–” 1 second.

• 【Practical XH-M609 Low Voltage Protector】 Connect the positive and negative terminals of a 12-36V battery to the module's input terminals, then connect the output device to the module's positive and negative output terminals. This allows the XH-M609 low voltage disconnect module to precisely monitor battery voltage. When voltage drops below your preset protection threshold, it automatically disconnects the circuit to prevent battery damage from excessive discharge, significantly extending battery life. Featuring solderless terminals, it enables quick and easy installation for both novice and professional users.
• 【Customizable Settings】 XH-M609 DC voltage protector Offers four user-adjustable parameters: Protection Voltage (0.4–59.9V) ;Recovery Differential Voltage (0.1–59.6V);Startup Delay (0–999 seconds);Voltage Calibration These settings meet precise requirements for various battery types and complex applications. The built-in LED digital display allows real-time monitoring of parameters.
• 【Safe Startup Delay Function】 low voltage disconnect Includes configurable startup delay (default: 0 seconds). After voltage recovery, the module waits before reconnecting power to prevent high inrush currents from compressors, motors, or other inductive loads. This protects both the module and connected devices.
• 【Reliability & Memory Retention】 Voltage protection module equipped with a high-precision chip and voltage calibration support for accurate readings. Key settings (protection voltage, recovery differential, delay) are retained after power loss—no need to reconfigure. Plug and play with peace of mind.
• 【Wide Range of Applications】 Designed for high-current relay load support in 12V/24V/36V DC systems. Ideal for solar energy storage low voltage disconnect, RVs and campers, boats and yachts, backup power supplies, security monitoring, electric vehicles, and other off-grid power applications.