---
product_id: 373314962
title: "Onyehn 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module"
brand: "onyehn"
price: "$110"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/373314962-onyehn-2pcs-12v-36v-dc-voltage-protection-module-digital-low
store_origin: NZ
region: New Zealand
---

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

**Brand:** onyehn
**Price:** $110
**Availability:** ✅ In Stock

## Summary

> 🔋 Protect your power, prolong your performance!

## 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?** $110 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/373314962-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

- • **Dual Module Pack:** Two compact protection modules included to double your battery defense.
- • **Smart LED Display:** 3-digit red LED shows real-time voltage settings for effortless monitoring.
- • **Precision Voltage Guard:** Set and protect your battery with 0.1V accuracy for ultimate power management.
- • **Automatic Load Disconnect:** Prevents over-discharge by cutting off load at preset voltage, extending battery life.
- • **Universal Battery Compatibility:** Works seamlessly with lead acid, lithium ion, and solar panel batteries.

## Overview

The Onyehn 2pcs DC Voltage Protection Modules offer precise, programmable low voltage disconnect for 12-36V lead acid, lithium ion, and solar batteries. Featuring 0.1V control accuracy, a clear 3-digit LED display, and automatic load disconnection at preset voltages, these compact modules safeguard batteries from over-discharge, enhancing longevity. Ideal for professionals seeking reliable, smart battery management in a sleek, dual-pack design.

## 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.

## 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 |
|---------------|-------|
| Manufacturer | Onyehn |
| Product Dimensions | 5.69 x 4.2 x 1.91 cm; 59 g |
| Batteries required | No |
| Included components | 2x Protection Module |

## Product Details

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

## 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

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-21*