---
product_id: 160834719
title: "Onyehn 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module"
brand: "onyehn"
price: "$U1247"
currency: UYU
in_stock: true
reviews_count: 7
category: "Onyehn"
url: https://www.desertcart.uy/products/160834719-onyehn-2pcs-12v-36v-dc-voltage-protection-module-digital-low
store_origin: UY
region: Uruguay
---

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

**Brand:** onyehn
**Price:** $U1247
**Availability:** ✅ In Stock

## Summary

> 🔋 Protect your power, prolong your freedom.

## Quick Answers

- **What is this?** Onyehn 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module by onyehn
- **How much does it cost?** $U1247 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/160834719-onyehn-2pcs-12v-36v-dc-voltage-protection-module-digital-low)

## 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 Powerhouse:** Sleek 2.24x1.65 inch footprint fits seamlessly into any power setup without bulk.
- • **Smart Digital Display:** 3-digit red LED lets you monitor and program voltage thresholds with ease.
- • **Precision Voltage Guard:** Ultra-accurate 0.1V control protects your battery from damaging over-discharge.
- • **Energy-Saving Auto Disconnect:** Automatically cuts off load at preset voltage to extend battery life and avoid costly replacements.
- • **Versatile Battery Compatibility:** Works flawlessly with lead acid, lithium ion, and solar panel batteries—perfect for modern energy systems.

## Overview

The Onyehn 2pcs 12V-36V DC Voltage Protection Module is a compact, programmable low voltage disconnect switch designed to safeguard lead acid and lithium ion batteries from over-discharge. Featuring a precise 0.1V control accuracy and a clear 3-digit LED display, it automatically disconnects loads to extend battery lifespan. Ideal for solar, IoT, and industrial applications, this module balances smart protection with minimal power consumption in a sleek, space-saving design.

## Description

Buy Onyehn 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module: Controllers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Accurate, works as described - The built in voltmeter is within a few hundredths of a volt to my Fluke meter. The disconnect was within 0.1v of the disconnect setting. Perfectly acceptable for a $5 part. Some have complained that the disconnect continues to drain the battery after disconnecting the load. In my application, I have a 12V SLA battery, an AC to DC power supply set at 13.5V (float voltage) and a load. I connected the power supply and load to the VIN terminals, and the battery to the VOUT terminals. This is opposite to the published diagram. When the AC voltage drops out, the load stays on until the battery voltage drops below disconnect (12v), then the relay opens and the battery is disconnected and has no parasitic load. When AC power is restored the relay closes and the battery gets charged.
Review: Works great with IOT Relay - This is a very simple but ideal unit for Battery systems. I have configured one with a Battery Charger Plugged into a IOT Relay to turn the charger on when the battery is 25% low and then turn the charger off when battery is fully charged. The other Voltage Protection Module I will use to disconnect the battery complex if the voltage gets too low. The one little funny issue I had set (left button 11.5V) then you set a different voltage (right button to .5) this is wired until you understand if the full voltage is 12V and the charge voltage is 11v the different voltage is .5V. Yea I know a little wired, once you figure this out its easy to work with. On one of my units the voltage read .1V off no problem if you want true 12v you set it to 11.6v. These are very inexpensive units that do just what I needed them to do even more expensive Voltage Protection Module can't do what these little guys can do.

## 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 | #22,251 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11 in Electromechanical Controllers |
| Customer Reviews | 4.2 4.2 out of 5 stars (476) |
| Date First Available | April 17, 2019 |
| Display Type | LED |
| Item Weight | 2.08 ounces |
| Item model number | XH-M609 |
| Manufacturer | Onyehn |
| Product Dimensions | 2.24 x 1.65 x 0.75 inches |

## 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

![Onyehn 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

### ⭐⭐⭐⭐⭐ Accurate, works as described
*by T***D on November 24, 2024*

The built in voltmeter is within a few hundredths of a volt to my Fluke meter. The disconnect was within 0.1v of the disconnect setting. Perfectly acceptable for a $5 part. Some have complained that the disconnect continues to drain the battery after disconnecting the load. In my application, I have a 12V SLA battery, an AC to DC power supply set at 13.5V (float voltage) and a load. I connected the power supply and load to the VIN terminals, and the battery to the VOUT terminals. This is opposite to the published diagram. When the AC voltage drops out, the load stays on until the battery voltage drops below disconnect (12v), then the relay opens and the battery is disconnected and has no parasitic load. When AC power is restored the relay closes and the battery gets charged.

### ⭐⭐⭐⭐⭐ Works great with IOT Relay
*by S***H on April 25, 2020*

This is a very simple but ideal unit for Battery systems. I have configured one with a Battery Charger Plugged into a IOT Relay to turn the charger on when the battery is 25% low and then turn the charger off when battery is fully charged. The other Voltage Protection Module I will use to disconnect the battery complex if the voltage gets too low. The one little funny issue I had set (left button 11.5V) then you set a different voltage (right button to .5) this is wired until you understand if the full voltage is 12V and the charge voltage is 11v the different voltage is .5V. Yea I know a little wired, once you figure this out its easy to work with. On one of my units the voltage read .1V off no problem if you want true 12v you set it to 11.6v. These are very inexpensive units that do just what I needed them to do even more expensive Voltage Protection Module can't do what these little guys can do.

### ⭐⭐⭐⭐ 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 Uruguay*
*Store origin: UY*
*Last updated: 2026-01-22*