---
product_id: 373314962
title: "2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module"
brand: "onyehn"
price: "R1196"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Onyehn"
url: https://www.desertcart.co.za/products/373314962-2pcs-12v-36v-dc-voltage-protection-module-digital-low-voltage
store_origin: ZA
region: South Africa
---

# 12-36V DC input range Compact 57x42x19mm size Precise 0.1V voltage control 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module

**Brand:** onyehn
**Price:** R1196
**Availability:** ✅ In Stock

## Summary

> 🔌 Stay powered, stay protected — never let your battery drop below the line!

## 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?** R1196 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/373314962-2pcs-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

- • **Dual Module Pack:** Two modules included for versatile setups or backup—because one is never enough.
- • **Smart LED Display:** Clear 3-digit red LED readout for effortless monitoring and quick parameter adjustments.
- • **Compact Powerhouse:** Small footprint (57x42x19mm) fits seamlessly into any project without bulk.
- • **Precision Voltage Guard:** Protect your batteries with ultra-accurate 0.1V control to avoid costly over-discharge.
- • **Universal Battery Compatibility:** Works flawlessly with lead acid, lithium ion, and solar panel batteries—future-proof your power.

## Overview

The Onyehn 2pcs DC Voltage Protection Module offers programmable low voltage disconnect for 12-36V lead acid, lithium ion, and solar batteries. Featuring precise 0.1V control, a compact design, and an intuitive LED display, it safeguards batteries from over-discharge to extend lifespan. Ideal for professionals seeking reliable, space-saving battery protection with easy setup and dual modules for enhanced flexibility.

## Description

NOTICE: 1.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. 2.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. 3.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. Package Included: 2x Protection Module. 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.

Review: Battery saver
Review: Good product

## 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, Maximum Amperage before Breaker Trips: 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.) Package Included:2x Protection Module.
- 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 |
| Brand | Onyehn |
| Brand Name | Onyehn |
| Color | red |
| Colour | red |
| Customer Reviews | 4.2 out of 5 stars 458 Reviews |
| Display Type | LED |
| Display type | LED |
| Included Components | 2x Protection Module |
| Item Dimensions L x W x H | 5.7L x 4.2W x 1.9H centimeters |
| Item Weight | 0.06 Kilograms |
| Item weight | 0.06 Kilograms |
| Manufacturer | Onyehn |
| Material | Lead |
| Material Type | Lead |
| Product dimensions | 5.7L x 4.2W x 1.9H centimeters |

## Product Details

- **Colour:** red
- **Brand:** Onyehn
- **Voltage:** 36 Volts (DC)
- **Material:** Lead
- **Display type:** LED

## 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)
![2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module - Image 2](https://m.media-amazon.com/images/I/614OjHSnJXL.jpg)
![2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module - Image 3](https://m.media-amazon.com/images/I/8164a9raXHL.jpg)
![2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module - Image 4](https://m.media-amazon.com/images/I/61ehwIaLMsL.jpg)
![2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module - Image 5](https://m.media-amazon.com/images/I/51IXLEd8DbL.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 27 December 2025*



### ⭐⭐⭐⭐⭐ Good product
*by A***R on 31 January 2026*



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



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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-23*