---
product_id: 160834719
title: "2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module"
brand: "onyehn"
price: "118 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Onyehn"
url: https://www.desertcart.pl/products/160834719-2pcs-12v-36v-dc-voltage-protection-module-digital-low-voltage
store_origin: PL
region: Poland
---

# 12-36V input range 0.1V control accuracy 20A max instantaneous current 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module

**Brand:** onyehn
**Price:** 118 zł
**Availability:** ✅ In Stock

## Summary

> 🔋 Protect your power, prolong your freedom.

## Quick Answers

- **What is this?** 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module by onyehn
- **How much does it cost?** 118 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/160834719-2pcs-12v-36v-dc-voltage-protection-module-digital-low-voltage)

## Best For

- onyehn enthusiasts

## Why This Product

- Trusted onyehn brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Smart Display:** Miniature 57x42x19mm board with a clear 3-digit LED display for effortless monitoring and adjustments.
- • **Precision Voltage Guard:** Set your exact low-voltage cutoff with 0.1V accuracy to protect your battery’s lifespan.
- • **Automatic Load Disconnect:** Automatically cuts off power at preset voltage to prevent over-discharge and extend battery life.
- • **Universal Battery Compatibility:** Seamlessly works with lead acid, lithium-ion, and solar panel batteries for versatile power setups.
- • **Non-Volatile Memory & Easy Reset:** Settings are saved even when powered off, with a simple factory reset via button combo.

## Overview

This 2-pack DC Voltage Protection Module offers precise, programmable low-voltage disconnect for 12-36V lead acid and lithium-ion batteries. Featuring a compact design with a bright LED display and 0.1V control accuracy, it automatically disconnects loads to prevent battery over-discharge, extending battery life. Ideal for solar setups and single battery systems, it supports up to 20A instantaneous current with easy parameter setting and memory retention.

## Description

Product description 2Pcs XH-M609 DC 12V-36V Voltage Protection Module -Digital battery over-discharge protection switch is specially designed for 12-36V lithium and lead-acid battery. Board Size 57 X 42 X 19mm/2.24 X 1.65 X 0.75inch(L*W*H) Example of setting instructions Set lower than 12.5V to stop , higher than 14V to start Set the protection value:press " + " once to display the protection value , double- click " + " , the decimal point flashes , press+ , - to change the value at this time , and change it to12.5. If there is no operation for 3 seconds , the module will automatically save and exit the setting mode. Set the return difference value:press " -" once to display the return difference value , double-click the " - " the decimal point flashes , press " + , - " to change the value at this time , and change it to 1.5. If there is no operation for 3 seconds , the module will automatically save and exit the setting mode. Trouble Shooting Trouble:Set this up to test a 3s li-on pack on a 10 watt LED the display lit for a couple minute then the module went dead never worked. Reason:The module is only suitable for a single battery , not for battery pack. Solution:Please connect with a single battery. How to use The first time a new battery is used, the rated voltage value is close to the actual value, Judgment to stop the discharge voltage. A reasonable discharge voltage value can be obtained according to the general voltage calculation method of the battery. When the old battery is used, the actual voltage value and the rated voltage value are quite different, so you need to measure the stop voltage value in actual use. Battery charging usually uses slow charging (the voltage and current of fast charging are relatively large, and the battery is easily damaged.) The charging voltage of slow charging is 1.2 times the rated voltage, and the charging current is adjusted to about 2/10 of the rated capacity current of the battery. For example: the charging voltage of a 6V 50Ah battery is about 7.2V, adjust the charging current to 10A. Package Included 2x Protection Module

Review: Battery saver - Used these as a way to turn on and off a relay for my solar setup. I found without a device like this, my batteries would be drained below optimal levels which could damage the batteries. This turns off the relay so my EcoFlow stops pulling power from the batteries till the on voltage is achieved again.
Review: Good buy - Good buy

## Features

- 🌟Board Size: 57 X 42 X 19mm/2.24 X 1.65 X 0.75inch(L*W*H), Input Voltage Range: DC12-36V, Control Accuracy: 0.1V, Power Consumption: <1.5W, Instantaneous maximum current before circuit breaker trip: 20A.
- 🌟Note:Due to the limitation of the size of the PCB board, the relay size of this module is mini and the circuit lines are very thin. The current should not be too large during actual use. If the current exceeds 8A, the relay contacts may be blown and cannot be used normally.The maximum current is 10A when the voltage is below 12V, and less than 8A when the voltage exceeds 12V
- 🌟Programmable battery low voltage disconnect switch for DC12-36V lead acid battery and lithium ion battery. It's a protection switch module, not included batteries itself.Compatible Battery: lead acid, lithium ion battery, solar panel battery.Not suitable for battery packs.
- 🌟On-board momentary push button to set the low voltage disconnect parameter and 3 digit red LED display the parameter easy to operation.When the battery voltage reach the setting values, the module will disconnect load automatically to aviod the battery from over discharging to prolong the battery lifetime. (Note:The relay does not contain a power cut-off switch,remember to cut off the power supply after disconnection, otherwise the module will continue to use the battery until the voltage is 0.)
- 🌟Reset:When the power is off, press and hold the two buttons at the same time, and then power on. At this time, the screen displays "888", indicating that the factory settings are restored.The factory-set protection value: 12V, difference value: 2V.Difference Value"is the value between the battery voltage to disconnect and the battery voltage to reconnect.
- 🌟Display is accurate, the switch module is quickly to open and close when near minimum voltage; Settings is stored non-volatile, it can keep set when power off

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QNXM4LS |
| Best Sellers Rank | #21,184 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Electromechanical Controllers |
| Brand | Onyehn |
| Brand Name | Onyehn |
| Color | black,gray |
| Customer Reviews | 4.2 out of 5 stars 486 Reviews |
| Display Type | LED |
| Included Components | 2x Protection Module |
| Item Dimensions L x W x H | 2.24"L x 1.65"W x 0.75"H |
| Item Weight | 0.06 Kilograms |
| Manufacturer | Onyehn |
| Material | Lead |
| Material Type | Lead |
| Product Dimensions | 2.24"L x 1.65"W x 0.75"H |

## Product Details

- **Brand:** Onyehn
- **Color:** black,gray
- **Item Weight:** 0.06 Kilograms
- **Material:** Lead
- **Product Dimensions:** 2.24"L x 1.65"W x 0.75"H

## Images

![2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module - Image 1](https://m.media-amazon.com/images/I/71+zHSt8joL.jpg)

## Questions & Answers

**Q: I have 20v input and want 6v output can you set the output voltage? I need low voltage protection and the ability to step down the voltage.**
A: What you need is called a "buck". There are 3 kinds: step-up, step-down and step-up/down.

I use a step up/down buck with this low-voltage cutoff module. As the output voltage from the LiPo battery that I'm using drops from 12.4V at fall charge to 10.4V at minimum operating voltage, the buck maintains a constant 12.0V to the powered device. When the battery reaches it's minimum recommended operating voltage of 10.4V, the low-voltage cutoff module cuts off power to prevent the battery from further discharging. LiPo batteries can be permanently damaged if they fall below about 9V output (and they're expensive to replace!)

**Q: Will this work with LiPo batteries?**
A: yes

**Q: I can connect this to a li ion battery and it will output enough power for a 300w inverter? Something like 25 amps?**
A: In your scenario, you would use this module to control a higher amperage relay that can handle the higher load. Just connect the output of the protection module to the control terminals of the larger relay.

**Q: Why is imput voltage 12-36 but output is 6-60V?  Can this be used with 56V battery?**
A: Grammatical error, 36v max, in you're case it it will work if you have access to the connections of the individual cells or banks

## Customer Reviews

### ⭐⭐⭐⭐⭐ Battery saver
*by J***S on December 27, 2025*

Used these as a way to turn on and off a relay for my solar setup. I found without a device like this, my batteries would be drained below optimal levels which could damage the batteries. This turns off the relay so my EcoFlow stops pulling power from the batteries till the on voltage is achieved again.

### ⭐⭐⭐⭐⭐ Good buy
*by J***O on March 8, 2026*

Good buy

### ⭐⭐⭐⭐ Works. No directions
*by S***R on September 5, 2024*

Another seller of this same item has excellent directions on the amazon page. This seller doesn't. I took off one star for directions. It looks to me like several sellers are selling the same item. The first one I got, from another seller, did not work at all. I opened the first one from this seller and it worked like a champ. And I have a spare. Every feature worked fine. When I lowered the voltage below the cutoff, it cut off great. When I raised it 2V over the cutoff, it came back on. I did not have to adjust the voltage, it was spot on to my meter out of the package. Perfect. I have a 24V LIFEPO4 battery, and it is nominally at about 26V. By 24V, there is almost nothing left in the battery, but my circuit doesn't like low voltage, so the cutoff at 24V makes a clean off, so if I forget to turn it off (yes, I did that once, with bad results), the circuit is protected. This is even higher cutoff than the battery pack bms (2.5V/cell=20V) .

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-20*