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The Best 12V Low Voltage Disconnect of 2023 – Reviewed and Top Rated

2,742 Reviews Scanned

Rank No. #1

CZH-LABS LVD Low Voltage Disconnect Module. (12V / 30Amp)

Operating Voltage: DC 6 to 18V, Rated current: 30 Amp.
To protect electronics from damaging low voltages and prevent a deep discharge of a battery during an extended power outage, the LVD module will automatically disconnect the battery when the voltage falls below the user adjustable cutoff voltage. When power is restored the Smart Switch will automatically reconnect the battery. thereby protecting the battery from total discharge (helping to prolong the life of the battery).
Programmable voltage setting for Disconnect and Reconnect (rocker switch set to AUTO). With emergency ON or OFF function, if you want switch output to be immediate and remain ON or OFF, you can set rocker switch to ON or OFF.
Set rocker switch to AUTO, when the battery voltage drops to less than or equal Disconnect Value and continuously held for 5 seconds, load switch will OFF. When the battery voltage rise to greater than or equal Reconnect Value and continuously held for 5 seconds, load switch will return to ON state. this will better prevent malfunction.
Based on Microcontroller and MOSFET (on status resistance < 0.003 ohm), more precise voltage, smart and long life switch output. Green-red dual color LED indication for output switch ON and OFF.

SaleRank No. #2

Blue Sea Systems 7635 m-LVD Low Voltage Disconnect

65 Amp continuous rating
12V DC voltage input
Status light in both m-LVD and Remote Control Switch provides visual warning of low voltage state prior to disconnect

Rank No. #3

Digital Low Voltage Protector Disconnect Switch Cut Off 12V Over-Discharge Protection Module for 12-36V Lead Acid Lithium Battery Low Voltage Cutoff for Solar Panel Lighting System Camper

【NOTE】This product is a voltage controller, which turns on and off the output through a relay, which only acts as a switch and cannot change the voltage. It's a protection switch module, not included batteries itself. In addition, if you have any questions in use, please contact us at the first time.
【OVER DISCHARGE PROTECTION】This battery controller provides a high degree of flexibility in terms of discharging modes and parameter settings. Users can easily set the parameter to disconnect the battery automatically when it reaches a preset voltage, thus preventing over-discharging and extending battery life. With its customizable parameters, this battery controller allows users to tailor their power management system to their specific needs and preferences.
【MEMORY FUNCTION】With power-off protection, it will save your settings in the event of an unexpected loss of power. This feature is crucial for electronic devices that require specific configurations, as it prevents the loss of critical data and allows you to resume work where you left off.
【DELAY TURN-ON】That means, after a disconnect, the interval between turning on again. The time range that can be set is 0-999 seconds
【PARAMETER】Board Size: 57 x 42 x 19mm/2.24 x 1.65 x 0.75inch(L*W*H); Input Voltage: DC 12-36V; Accuracy: 0.1V; Power Consumption: <1.5W; Maximum Amperage before Breaker Trips: 20A

Rank No. #4

Low Voltage Disconnect with recessed selector, 12V/24V Auto Detect, GPC-1005B-R

8 selectable thresholds for different battery type (AGM, Li-ion, LiFePO4, etc.) and wiring conditions: 9.3~12.0V for 12V battery and 18.6~24.2V for 24V battery
20A continuous current in full temperature range -40~130⁰F
4.5mΩ ultra-low resistance: Less than 1/10 of power loss compared to competitors
Automatic 12V/24V battery detection
Low current consumption: down to 0.26mA with 12V battery

Rank No. #5

Onyehn 2pcs 12V-36V DC Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module

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

Rank No. #6

CZH-LABS Electronics-Salon 1PCS Low Voltage Disconnect Module LVD, 12V 10A, Protect/Prolong Battery Life.

Low Voltage Disconnect Module LVD, 12V 10A, Protect/Prolong Battery Life.
Quantity: a lot of 1 piece.
Part number: F-1000/12V
Suitable battery: 12V , Rated current: 10A.
Discount voltage: 10.0V , Reconnect voltage: 10.7V.

Rank No. #7

2 PCS Low Voltage Cutoff, Icstation DC 12V-36V Low Voltage Disconnect 20A Over Discharge Protection Low Voltage Protector Disconnect Switch Module for Lead Acid Lithium Battery Solar Panel Light

【NOTE】This product is a voltage controller, which turns on and off the output through a relay, which only acts as a switch and cannot change the voltage. In addition, if you have any questions in use, please contact us at the first time.
【OVER DISCHARGE PROTECTION】This battery controller provides a high degree of flexibility in terms of discharging modes and parameter settings. Users can easily set the parameter to disconnect the battery automatically when it reaches a preset voltage, thus preventing over-discharging and extending battery life. With its customizable parameters, this battery controller allows users to tailor their power management system to their specific needs and preferences.
【MEMORY FUNCTION】With power-off protection, it will save your settings in the event of an unexpected loss of power. This feature is crucial for electronic devices that require specific configurations, as it prevents the loss of critical data and allows you to resume work where you left off.
【DELAY TURN-ON】That means, after a disconnect, the interval between turning on again. The time range that can be set is 0-999 seconds
【PARAMETER】Board Size: 57 x 42 x 19mm/2.24 x 1.65 x 0.75inch(L*W*H); Input Voltage: DC 12-36V; Accuracy: 0.1V; Power Consumption: <1.5W; Maximum Amperage before Breaker Trips: 20A

Rank No. #8

12-36V Low Voltage Digital Protector Disconnect Switch Cut Off Lithium Battery Over Discharge Protection Module Pack of 2

Product Information: Input Voltage: DC 12-36V,Control Accuracy: 0.1V, Maximum Amperage Before Breaker Trips: 20A,Power Consumption: Less than 1.5W,Size: 2.24*1.65*0.75 inch
Accurate Display: Cywhrvzsf switch module will turn on or off quickly when it is close to the lowest voltage, Cywhrvzsf module has non-volatile storage of settings,it can still be maintained after a power off
Function：Cywhrvzsf protection switch module is a programmable battery low voltage disconnect switch module for DC 12-36V lead acid and lithium ion batteries, battery not included
Extend Battery Life: When the battery voltage reaches the set value, the Cywhrvzsf module will automatically disconnect the load to avoid over-discharge of the battery and prolong the battery life. The Cywhrvzsf module has a momentary button to set the low voltage disconnection parameters and 3-digit red LED display parameters, Easy to operate
[Satisfactory Service]: We Provide 24-hour online service,If you encounter any problems, Please email SELLER SUPPORT (Not Amazon support), we will give you a perfect solution.

Rank No. #9

10-30V 80Amp Low Voltage Disconnect LVD Module, for 12V 18V 24V Battery

Operating voltage DC 10 to 30V, maximum support current up to 80 Amp. Can support 12V, 18V or 24V battery system. Reconnect and disconnect voltage 10 ~ 30V you can set it arbitrarily (NOTE: reconnect voltage must be greater than the disconnect voltage). The product design is based on microcontroller and high-power latching relay, especially optimized anti-interference ability to better support inverter load, and make the quiescent working current very small.
With a rocker switch for override, can set to ON / AUTO / OFF function. Red DIP switch, programmable voltage setting for Disconnect and Reconnect. With three mode output status led, ON / ALARM / OFF, to help you intuitively understand the output status.
When the battery drops to the disconnect voltage value, there will be a delay of 120 seconds. During this period, the ALARM function will be used to remind you that if the battery voltage does not return to the normal voltage during this period, the output will be turned off. When the battery voltage returns to the reconnect voltage value for 5 seconds, the output will be reconnected.
Support external wiring connect emergency switch, the switch must be a momentary-on type switch. When the output is in a protected low-voltage disconnected state, and rocker switch setting to AUTO status, and battery voltage >=10V, Trigger external emergency switch, the module will be forced ON for 120 seconds for you to complete the emergency.
Support external wiring connect active-buzzer or indicator light for alarm function.

SaleRank No. #10

DIANN XH-M609 DC 12V-36V Battery Low Voltage Disconnect Protection Module for Automobile New Energy Electric Vehicle Battery

Power Voltage: DC 12-36V ; Output Voltage:DC 12-36V; Control Precision: 0.1V ;Power: ＜1.5W
Discharge Protection: When the Voltage of Battery has Reached the Setting Voltages, to Avoid the Battery from Over Discharging,It Will Disconnect the Load Automatically, Help Prolong the Service Life
LED Screen Display: XH-M609 Module Designed With LED Screen Display in Digital Way, Which Help Read the Output Voltage and Setting Parameters Easily
Functions: Over Charger Protection, Over Discharge Protection Function, Short Circuit Protection Function,Over Current Protection Function
Wide Application: XH-M609 Charger Module are Suitable for a Variety of Batteries and Llithium Batteries,when the Battery is Under Voltage Loss or Low Battery, it will be Disconnected Automatically

Rank No. #11

Diitao 5PCS DC 12V-36V Voltage Protection Module,Digital Low Voltage Protector Disconnect Switch Cut Off 12V Over Discharge Protection Module XH-M609

【DC 12V-36V Voltage 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.(Only suitable for a single battery, not for a battery pack.)
【Parameter】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.
【A Long Service Life】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.
【Effectively Protect The Circuit】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.
【What you get?】You will reciever DC 12V-36V Voltage Protection Module.If you have any questions after purchase, you can contact us at any time by email, we will give a satisfactory solution.

Rank No. #12

12V Car Battery Protector, Smart Automatic Battery Voltage Disconnect Switch Kit with LED Digital Voltmeter Display, Universal Auto Starter Dual Remote Control Master Kill Switch Car Battery Saver

Please Read Before Order Battery Switch - Battery disconnect switch remotely master kill your car power system, it can prevent battery over discharge, battery saver, prevent vehicle breakdown duto the flat battery, a proper maintenance will extend and protect the battery and engine life, when installing the battery, the power must be turned off first, and the product cannot be installed and used when the battery is depleted. Fits for 12V DC power supply post type batteries vehicles ONLY!!
Car Battery Energy Saving - Car battery includes two 12V remote controls with batteries can be wireless controlled remotely by the remote disconnect switch. The effective range of 320ft (98 M) can be adjusted in time. The power-off voltage can be set freely, the battery connection will be disconnected to save what charge is in the battery., in the process of driving or in the state of vibration, the remote control power-off function is not available
LED Digital Voltmeter Display - Three-button battery cut off switch equipped with a digital display to monitor the battery status in real time, remind you to charge or replace the battery in time, and better avoid starting the car engine when the car battery is exhausted, 3 modes of fast switching with mode indicator light (power on, power off, automatic). In addition, if the car battery is lower than the shutdown voltage, it will automatically disconnect Battery and stop further consumption
One-button Auto Starter Control Switch - The best installation position of the wire-controlled switch is at the left front of windshield, quickly start the car battery, If you do not start the car, auto starter will reprotect your battery and disconnnect in one minute, press the wire-controlled switch 3 times in a row, and the device will be powered off immediately; In the case of electricity, press the line control switch once, the device will be powered on immediately
IP68 & UL45 - Waterproof and high temperature resistant, battery protector prevented numerous dead batteries caused by GPS units or lights left on. Rated voltage: 10V-18V, Working temperature: -20°-85°, Rated current: 100A, Instantaneous current: 1000A, Frequency: 433MHZ. Auto starter include battery protector device, 2pcs remote control key w/battery, 6025 bracket, positive electrode, negative electrode

Rank No. #13

Electronics-Salon Low Voltage Disconnect Module LVD, 12V 10A, Protect/Prolong Battery Life.

Low Voltage Disconnect Module LVD, 12V 10A, Protect/Prolong Battery Life.
Part number: D-1077/12V.
Mount type: panel mount.
Suitable battery: 12V.
Rated current: 10A.

Rank No. #14

12V Car Battery Protector, Smart Automatic Battery Voltage Disconnect Switch Kit with LED Digital Voltmeter Display, Universal Auto Remote Control Power-off Switch Anti-leakage Power Protector

Easy to Operate - Press the button to restore power, the operation process does not take more than 1 second without unlocking, no APP is required. Support the whole vehicle power off, completely avoid leakage and abnormal power consumption. Using the wooden remote control, you can control the power-on and power-off of the breaker from a long distance.
No Maintenance - The switch is affixed to the outside of the car, no remote control required, no cell phone required, it's always there. The remote control switch is designed with a waterproof rating of IP68, which can withstand wind, rain and washing when washing the car. The wire control line supports the high temperature resistance standard of UL45.
Energy Saving and Low Consumption - The switch does not consume power when it is in standby, which reduces the overall power consumption of the device, and can withstand large currents. It can support instantaneous 1000A current, and the instantaneous current of the car can reach 300A-500A, which is completely within the control range of this product.
Self-holding Function - The relay assembly does not need to be energized and has a self-holding function, so that it will not consume additional battery power. The voltage is displayed by the highlighted digital tube, and you can see at a glance that there are three mode switching keys, one key and one mode.
3 Modes - in power-off mode, it will power off the whole car, and the car will no longer consume battery power; in power-on mode, it will be connected all the time without power, this mode has no protective effect, use it with caution; in automatic mode, when the voltage When the voltage is lower than the set voltage, it will automatically disconnect. This mode is recommended.

SaleRank No. #15

Blue Sea Systems 7615 SOLENOID TIMER 120A 12VDC ATD

Can Be Configured To Be Used As One Of The Following Battery Saving Products; Timer Disconnect, Low Voltage Disconnect, Automatic Charging Relay Or Solenoid
Timer Disconnect: 12V Signal Triggers Relay To Connect Battery Power To Devices, When Signal Is Removed Timer Is Activated & Will Disconnect Devices After A Preset Time. Timer Ranges From 15 Min-4 Hrs
Low Voltage Disconnect: Senses Low Battery Voltage And Automatically Disconnects Devices, Can Be Used In Conjunction With Timer Disconnect. Will Disconnect Devices To Preserve Battery Power
Automatic Charging Relay: Combines 2 Charging Batteries & Isolates Them When Discharging. Single Side Sensing Design Monitors Voltage Of The Start Battery. Ideal For Agm Or Larger Auxiliary Batteries

Rank No. #16

DAOKI 2PCS Digital Low Voltage Discharge Protection Module Disconnect Switch Over Discharge Protection Protector for 12-36V Lithium Battery with 24AWG Wire

Input Voltage Range: DC12-36V, Control Accuracy: 0.1V, Power Consumption: <1.5W, Maximum Amperage before Breaker Trips: 20A.
LED digital tube display to display the real time battery voltage, shut off voltage and guard voltage. Two adjustment buttons to set the shut off voltage and guard voltage. One LED indicator light, lighting on/off when the voltage protection module connect/disconnect the battery.
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 module only work for a single battery, not for battery pack.
Set shut off voltage: Press button “+” for 3 seconds and the LED digital display will flash. Press button “+” or “-” to set the value when it flash. After that, release the button until the screen no longer flickers, the setting is saved successfully
Set guard voltage: Press button “-” for 3 seconds and the LED digital display will flash. Press button “+” or “-” to set the value when it flash. After that, release the button until the screen no longer flickers, the setting is saved successfully.

Rank No. #17

AITRIP 3PCS DC 12V-36V Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module Output 6-60V XH-M609

AITRIP digital battery over-discharge protection switch is specially designed for 12-36V lithium and lead-acid battery. This is a low voltage protection module, not included any battery. When the battery voltage reaches the setting values, the module will disconnect load automatically to prevent the battery from over-discharging so as to prolong the battery lifetime.
Main functions: over charge protection, over discharge protection function, short circuit protection function, over current protection function.
Supply Voltage: DC 12-36V ,Output Voltage: Equal to supply voltage ,Control Precision: 0.1V Power: ＜1.5W
Only suitable for a single battery, not for battery pack
Compatible with 12-36V lithium and lead acid battery

Rank No. #18

Alinan 4pcs XH-M609 DC 12V-36V Low Voltage Disconnect Protection Module Digital Display Over-Discharge Circuit Protection Module

★Input Voltage Range: DC12-36V, Control Accuracy: 0.1V, Power Consumption: <1.5W, Maximum Amperage before Breaker Trips: 20A.
【Compatible Battery】: solar panel battery and so on.
【Main Functions】: over charge protection, over discharge protection function, short circuit protection function, over current protection function.
★With 3 red LED digital tube display, 2 adjustment button settings, 1 LED indicator. When the voltage protection module is connected to the battery, the light is on; when the battery is disconnected, the light is off.
★When the battery is under voltage loss or low battery, it will be automatically disconnected. 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.

Rank No. #19

CZH-LABS Electronics-Salon Low Voltage Disconnect Module LVD, 12V 30A, Protect/Prolong Battery Life.

Part number: MD-D1021/12V, Version 2.0 (from June-26, 2018 change to Version 2.0, Version 1.0 we used a relay as a ON/OFF switch, version 2.0 changed to Ultra low impedance MOSFETs).
Mount type: panel mount.
Suitable battery: 12V.
Rated current: 30A.
Datasheet: https://images-na.ssl-images-amazon.com/images/I/81mTLi3gbZL.pdf

Rank No. #20

Weewooday DC 12V-36V Voltage Protection Module Digital Low Voltage Protector Disconnect Switch Over Discharge Protection Module Output 6-60V, Low Power Disconnection (2 Pieces)

Specific information: the supply voltage is DC 12V-36V, the output voltage is equal to the supply voltage, this voltage protection module could control the voltage within 0.1V
Main functions: this digital low voltage protector is functional and practical, contains various functions, over charge protection, over discharge protection function, short circuit protection function, over current protection function
Diverse usages: these disconnect over discharge protection modules are suitable for a variety of batteries and lithium batteries, a wide range of applications, when the battery is under voltage loss or low battery, it will be automatically disconnected
LED screen display: designed with led screen display in digital way, which can allow you easily read the output voltage and stetting parameters, the voltage can be set within 12-36V as you like
Discharge protection for batteries: when the voltage of battery has reached the setting voltages, this over discharge protection module will disconnect the load automatically to avoid the battery from over discharging to prolong the its service life

Last update on 2023-08-13 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: What is a low voltage disconnect?

A: Low Voltage Disconnects. The Low Voltage Disconnect (LVD) is a 100% solid state electronic protection module which disconnects predetermined auxiliary loads from the starting battery bank to assure enough power is left in the batteries for starting. The unit is capable of directly powering loads of up to 70A continuous draw at 85°C…

Q: What is battery cutoff voltage?

A: Cutoff voltage. In electronics, the cut-off voltage is the voltage at which a battery is considered fully discharged, beyond which further discharge could cause harm.

Q: What is a battery cut off switch?

A: This Battery Cut Off Switch is a single circuit disconnect switch with detachable key. It isolates the battery circuit for anti-theft, anti-fire, short circuit protection, and unwanted battery drain and is ideal for RV, marine and farm equipment.