6-48V Battery Charging Controller Module, Battery Low Voltage Cut Off Automatic Switch On Undervoltage Controller, for Under Voltage Control Over-Discharge

one module worked for about five minutes & went blank; the other would not light up at all. have two from a previous order that worked fine. 30 day return window expired so no recourse but the junk pile. advise to test all products before return time expires. will google to see if there is a common problem with these.

The meter usually reads ~250 mV lower than the actual battery voltage. It's not stable though, so I can't safely set the cutoff threshold that much lower and have it work consistently.

Do not buy this item . they are not a good company. Degrade you then went you to psy to ship it back

No directions came with it, hooked up to 12v DC and nothing happened, would not turn on

Generally i don't leave negative reviews. This is a garbage product. Hole is so small, space is narrow, plastic battery security piece is wobbling.

As the voltage drops, the relay will click and disconnect your load, but the device will continue to draw power from your battery. So if you leave it plugged in it will drain your battery down to ZERO volts. worse yet about 3 volts it will close the relay again and your load is once again connected to your battery.