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Connection Diagram of Charging Mode
Discharge mode connection diagram
- WARNING
- Please make sure that "IN+ IN- OUT+ OUT-" and the positive and negative poles of the battery cannot be reversed. Reverse connection will damage the product, battery and charger;
- The charging mode and discharging mode need to use the button setting to switch the mode before use. See the description below for the switching method.
- It is a charging/discharging controller but not a charger or voltage converter.
Circuit Schematic
Quick start:
1. Discharge mode (battery low voltage protection mode)
For example: the working voltage of the battery is 18V, and the low-power protection voltage of the battery is 15V. It is expected to cut off the discharge when the battery voltage is less than or equal to 15V. The settings are as follows:
a. Connect the circuit according to "Figure 4.1 Discharge mode connection diagram".
b. "SWITCH 2" switch to "M" position, press "UP" or "DOWN" when the LED displays "01" Short press "SET", then the module is set to discharge mode 1.
c. "SWITCH 2" switches to "V", press "UP" or "DOWN", when the LED displays "CL", short press "SET", then press "UP" or "DOWN" to adjust the LED display value, set The value of "CL" is 15V, then press "SET" to save the value and exit the setting, and the setting will take effect.
d. "SWITCH 2" switches to "V" position, press "UP" or "DOWN" when the LED displays "CH", short press "SET", then press "UP" or "DOWN" to adjust the LED display value, set The value of "CH" is 15.5V, then press "SET" to save the value and exit the setting, the setting will take effect.
e. Switch "SWITCH 1" as needed. If it is manual mode, you need to press S1 to start the module manually, and it is not necessary for automatic mode.
2.Charging mode
For example: the working voltage of the battery is 18V, and the full saturation voltage is 20V. When the battery voltage is less than 18V, start charging, and when the battery voltage is greater than 20V, stop charging.
a. Connect the circuit according to "Figure 4.2 Connection Diagram of Charging Mode".
b. "SWITCH 2" switch to "M" position, press "UP" or "DOWN" when the LED displays "3", short press "SET", then the module is set to charging mode 3.
c. "SWITCH 2" switches to "V", press "UP" or "DOWN", when the LED displays "CL", short press "SET", then press "UP" or "DOWN" to adjust the LED display value, set The value of "CL" is 18V, then press "SET" to save the value and exit the setting, and the setting will take effect.
d. "SWITCH 2" switches to "V" position, press "UP" or "DOWN" when the LED displays "CH", short press "SET", then press "UP" or "DOWN" to adjust the LED display value, set The value of "CH" is 20V, then press "SET" to save the value and exit the setting, and the setting will take effect.
e. Switch "SWITCH 1" as needed. If it is manual mode, you need to press S1 to start the module manually, and it is not necessary for automatic mode.
2-in-1 Charge/Discharge And Protection Module
Functional Overview
- LED 60s auto off
- Charge/Discharge time control
- Manual mode/automatic mode switchable
- Force start time
- Programmable delay turn on/off
- 40A Relay
- Suitable for 5~60V
- "0" standby power consumption (manual mode)
Specifications
- Working Voltage: DC 5V-60V
- Max Current: 40A
- Maximum power: 1200 watts
- Standby Current: 0 in manual mode, 5mA in automatic mode at 18V
- Voltage accuracy: 0.1V
- Work Temperature:-25℃~80℃
- Work Humidity:5%~90%RH
- Shell size: 103.6mm*51.8mm*38.8mm
Shopper in Burnaby
Reviewed in Canada on February 9, 2025
Has worked for 6 months so far in hot and cold temperatures . I am not running 40A, only 7A at 24V, so the smallish terminals are not an issue for my use of running a 150W (or so) motor from a small solar system.
JMatt
Reviewed in the United States on February 20, 2025
Works well except for voltage calibration does not work for 48v . However one can work around this by using a good mutimeter and compensating by the difference in board reading and a good meter. Does the job for disconnecting when voltage on battery gets low and auto reconnecting after sufficient charge has taken place. Great protection against discharging your lithium battery too low.
Customer
Reviewed in the United States on January 3, 2025
This board exceeded my expectations. It has multiple modes and voltage settings that make it very useful. I'm using it to prevent over discharge of power tool batteries with my project. My only hope is that it holds up and only time will tell.
ACW
Reviewed in the United States on January 13, 2025
I purchased two of these. One was for a project powered by a drill battery that lacks a BMS. To prevent over discharging the drill battery, I purchased this and set the voltage appropriately. It is compact and unlike many of the other low volt disconnects on Amazon, this can handle lower gauge wires to actually run high amperage applications.My other purchase is to project a deep cycle lead acid battery from over discharge. My trailer did not have that capability so I was being forced to monitor the battery and make sure I switch off before the power gets too low. Highly recommend for campers, ham radio operators, and tinkerers.
-James
Reviewed in the United States on January 12, 2025
We use this to run our power wheels jeep with m18 Milwaukee batteries. Works excellent.
uppitykatt
Reviewed in the United States on July 22, 2024
I have purchased 2 of these since May. Both failed.I am a retired, Master Electrician with multiple control certifications, from nuclear to environmental, so I kind of know what I'm doing. I have built my own solar array systems (4,500 watts panels, 14,000 wh LiFePo4 batteries, 24 volt).I was using the first of these control boards in May, to act as voltage detection to run a "dump-load" controller for an electric water heater. I didn't build the dump system or install that board until 2 weeks ago. It worked fine - 23v it shuts down the contactor, 25.5v it would activate the contactor. The contactor powers a 1,000 w heater element. System voltage is set to not ever exceed 28.8v due to the controls in my MPPT charge controllers. and battery limits.Yesterday afternoon, I was in my basement when I realized that first control board was not operating. I tested all lines and everything was fine to the board. The board was dead. Tried multiple times to reset, nothing. Yep, so it worked for 2 whole weeks, yippee!!! Since it is past the 30 days, I lose on that one.Oh, but wait! There is more! Last week I ordered another one of these, since the first one was working well. I was going to build a new automatic transfer switch, using one of these as the voltage control, for a second solar setup. Today, even though the first one had died, I decided to go ahead with the build. The second one did fire up fine, but it would not allow me to calibrate it. It was over 1.2v off on the voltage. Then, after about 10 minutes, nothing.At least on the second one I am able to send it back for a refund. The first one I get to eat. Stay away from this thing.JUNK JUNK JUNK!
Richard
Reviewed in Canada on June 8, 2024
Worked ok until I connected a small battery in reverse polarity and it smoked and died.
Bob F.
Reviewed in the United States on June 27, 2024
I needed a low voltage cutoff for a dash camera setup but all the other ones cut power instantly when voltage drops, like when starting the car. This one has an adjustable countdown timer so if power goes below the set level for 2 seconds and your timer is set for 10 seconds it stays powered on without constant video interruptions. Instructions aren't great but that is common for most little devices like this.
Dominic Bérubé
Reviewed in Canada on May 6, 2024
It work for 1 week and broke.A have a 30 amp fuse and it didn't burn so my system draw less than that and the module stop working anyway.
Dog Mom
Reviewed in the United States on August 18, 2023
This multifunctional protection board has become an essential component for when we are camping and using our truck battery. We mainly use it in protecting our truck battery from discharging when running a portable fridge while we are camping. The LCD display offers real-time monitoring of voltage levels during charging and discharging. This level of precision enables me to keep a close eye on the health of my devices and prevent potential damage from voltage fluctuations. This will detect voltage drops below a predefined threshold and promptly disconnects the power supply, ensuring that my devices are shielded from operating under unsafe conditions. Whether it's during the charging or discharging phase, this protection board ensures that my devices operate within safe voltage parameters. This protection board is compatible with a wide range of devices, from battery-powered gadgets to charging systems. Its versatility makes it suitable for various applications, from DIY electronics projects to household electronics protection. Knowing that my devices are equipped with a robust protective barrier against voltage-related issues, even in my absence, offers me a sense of peace and confidence. Highly recommended.
Alex E. Mussman
Reviewed in the United States on November 25, 2023
Bought a peg perego connector on Amazon for $10 and the Bosch batter adapter for about $10 on ebay. Screw everything together onto this board and we’re all good to go without modifying the gator at all.I knocked it two stars because when I had the battery plugged in for over a week even without the power wheel running, it seems to draw just a slight amount of power and it drained my battery past the point of being able to charge again. I sparked it from another battery for a few seconds to get enough juice to bring it back, but that really stinks. So long as you disconnect the battery every time you’re done, no problem but we know how life goes and we forget and you might have a brick of a battery.
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