ICSTATION Low Voltage Disconnect, DC 6V-60V 30A Low Voltage Protector with LCD Display Charging Discharging Protection Board Disconnect Switch Module for Lead Acid Lithium Battery

best buy but poor packaging

not using as didn't order right item for what I was trying to do. put in stock, may use in camper.

This little device works great! I’m convinced a few of the lower star reviews were from a lack of understanding. There is another review with the translated setup manual and if you follow that this little guy works exactly as intended. Had it wired, setup and running within 10 minutes. Using it to protect a pair of Milwaukee batteries on my kids power wheels. Works like a charm!

Instructions in English: 🔘 Button Functions UP Button Short press: Switch between percentage display and time. Long press (5 seconds): Toggle between charging mode (IN) and discharging mode (OUT). SET Button Short press: View current parameter settings. Long press: Enter parameter setting mode. Set the following: UP: Upper voltage limit dn: Lower voltage limit OP: Conduction time dOP: Delay conduction time (0–999 seconds) FOP: Forced conduction time (discharge mode only, 0–10 seconds) DOWN Button Short press: Toggle relay on/off (emergency stop). When disabled, the LCD displays “OFF” and the relay is disconnected. Long press: Set LCD backlight mode: L-P: Backlight always on ON: Backlight auto-off after 5–10 minutes (press any key to wake it up) 🔋 Mode Descriptions Charging Mode (IN) When battery voltage ≤ dn (lower limit), the relay turns on and charging begins. When battery voltage ≥ UP (upper limit), the relay turns off, ending the charge. While charging, the relay is on and "IN" flashes. Discharging Mode (OUT) When battery voltage ≥ UP, the relay turns on and discharging begins. When battery voltage ≤ dn, the relay turns off, ending the discharge. While discharging, the relay is on and "OUT" flashes. ⚠️ Note: This device is a simple voltage controller. It uses a relay to switch output on or off. It does not regulate voltage or current—only on/off switching. ⚙️ Parameter Settings Enter Setting Mode: Long press the SET button. Navigate Parameters: Press SET to switch between parameters. Adjust Values: Use UP or DOWN to set values (short and long presses supported). Save & Exit: Long press SET again. 3.1 ⏱ Charge/Discharge Time Control If OP (conduction time) ≠ 0: Timing begins when the relay activates. Once OP time is reached, relay disconnects automatically. If voltage conditions are invalid during timing (< dn in charge mode or > UP in discharge), the device displays H:ER to signal a configuration error. Press any button to stop flashing. If time control is off (OP = 0), the total charge/discharge duration is still recorded and shown during time display mode. This resets upon exit or the next cycle start. 3.2 ⚠️ Auto Parameter Check If dn ≥ UP, the device will display ERR and not operate. 3.3 ⏲ Delay Function (dOP) Delay time between a completed cycle and the next relay activation (0–999 seconds). 3.4 🔄 Forced Relay Conduction (FOP) In discharge mode, when conditions are met, the relay forces ON for 0–10 seconds, allowing for voltage re-checking. Useful when test loads cause a false low-voltage reading at the start of discharge.

Used this on my son’s power wheel conversion. Wanted to make sure that I didn’t kill my Milwaukee batteries when using them in his quad. Set up can be a little tricky at first. But just read through the description and you’ll get it. Once set up you never have to mess with it again.