Xh-m608 Manual ^hot^ Jun 2026

The (also commonly known as the HCW-M631 ) is a versatile battery charge and discharge control module designed to manage and protect batteries within a 6–40V range . It features an integrated voltmeter and a relay output to automate the charging or discharging cycles, effectively preventing overcharging and over-discharging to extend battery life. Key Technical Specifications Model XH-M608 / HCW-M631 Input Voltage Range DC 6–40V Voltage Measurement Error ±0.1plus or minus 0.1 Output Type Relay Output (Dry Contact) Max Relay Current Up to 10A (Recommended 7A for long-term load) Dimensions Operational Modes and Features

| Battery Voltage | P1 (Lower Limit) | P2 (Upper Limit) | | :--- | :--- | :--- | | 6V Lead-Acid Battery | 6.0V | 7.2V | | 12V Lead-Acid Battery | 10.8V | 14.4V | | 24V Lead-Acid Battery | 24.0V | 28.8V | | 36V Lead-Acid Battery | 36.0V | 46.8V | | 48V Lead-Acid Battery (Up to 40V) | 48.0V | 57.6V |

If you want to protect a 12V battery from falling below 11.5V and stop charging at 14.5V: Set Low Voltage (long-press +): 11.5V. Set High Voltage (long-press -): 14.5V.

Relay closes when voltage drops below P1 (starts charging) and opens when voltage reaches P2 (stops charging).

The lower voltage limit is set higher than or equal to the upper voltage limit. Xh-m608 Manual

The module operates in four distinct modes, which can be selected via the on-board menu: U (Voltmeter):

⚠️ The XH-M608 features direct output. The voltage supplied to the input terminals will pass directly to the output terminals when the relay is active. Always ensure your power source matches the voltage requirements of your battery and load. 1. Charging Control System (Solar/Mains Charger)

: The charger will automatically start when the battery voltage drops to 10.8V and stop when it reaches 14.4V. This prevents both deep discharge and overcharging.

If you need help setting specific parameters for your setup, let me know: The (also commonly known as the HCW-M631 )

Connects to the positive terminal of the load (in discharge mode) or the battery (in charge mode).

| Terminal | Label | Connection | |----------|-------|-------------| | 1 | DC+ | Battery positive (monitoring) | | 2 | DC- | Battery negative (common ground) | | 3 | COM | Relay common terminal | | 4 | NC | Normally Closed (disconnected when relay active) | | 5 | NO | Normally Open (connected when relay active) |

The manual includes technical specifications:

| Problem | Likely Cause | Solution | |---------|--------------|----------| | Display shows --- | No battery connected or voltage < 10V | Check battery voltage and wiring | | Relay chatters | Loose connection or insufficient current | Tighten terminals; ensure battery > 9V | | Does not stop charging | P2 set too high or charger voltage never reaches P2 | Lower P2 or adjust charger output | | Stops charging immediately | P1 and P2 too close | Increase difference (e.g., 12.0V / 14.0V) | Set High Voltage (long-press -): 14

Set P0 to your "recovery" voltage (e.g., 12.5V) and P1 to your "cutoff" voltage (e.g., 10.5V).

Now go make something that clicks.

A comprehensive manual for the XH-M608 generally includes the following sections: