DC 5V-60V 40A Low Voltage Cutoff with LCD Display Low Voltage Protector

I built this battery box to power my garden fountain when my solar panel is not seeing sun light. I purchased a relay on Amazon that switches seamlessly between solar and battery. I installed a charging port with an LED. I wanted the LED to turn off not just when I unplugged the charger but when the charger entered the float mode. It took some time to properly program the relay with the correct settings and I am pleased to say that the relay works perfectly. As advertised this relay can work both for charging or discharging but you have to chose one or the other it can't do both at the same time. Now as I said the LED comes on when my battery is charging and goes off when my battery is fully charged. This is a well priced for such a perfect relay. I definitely recommend it for any DIY project.

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.

Great little gadget. I have built some battery packs from scratch and I used them to ensure the voltage is never below a certain threshold. To me it adds a layer of protection so you arent purely relying on your BMS, if your even using one! I think I have like 3 of these. Handy! I really wish they made a HIGH voltage disconnect.

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.

Good DC voltage controller for my solar panel related work. I'm using this product in between solar panels and Bluetti power station as power station solar input has 60v dc limitation. To avoid damage to power station, I'm using this lvd between Solar panels and power station with following settings. 1. Select SWITCH 2 to M, Set work mode to 4 (as voltage sampling comes from Input+ solar panels terminal) 2. Select SWITCH 2 to V, Set CL (lower limit) to 54.5v and Set CH (higher limit) to 55v 3. Didnt change anything for SWITCH 2 = T as I dont need any start delay or stop delay 4. Select SWITCH 1 to AUTO, so that this lvd keeps checking the solar panels input voltage during the daytime All the settings are permanently saved and working every day when solar power kicks in.

Directions are a little unclear of how to use product but with a simple YouTube search you too can figure it out. Had to return one due to it not working properly, but amazon replaced it no problem

Item as described. Works as it should.

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!

Exactement ce dont j'avais besoin. Facile à programmer

Simple to setup, does the job protecting battery from deep discharge.

Works as expected. Used it for a diy e bike battery conversion

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.

Worked ok until I connected a small battery in reverse polarity and it smoked and died.