Ampper12V 140Amp Dual Battery Isolator, Battery Voltage Sensitive Relay (VSR) Smart Battery Isolator with Voltmeter and Manual Control Button for Car and More

I have added an auxiliary 150 AH Gell battery to my van and this switch does a great job of keeping it charged and then cutting off when needed. Paid 145 Dhs for it. Worth the money. It is quite heavy and when it switched off and on you can tell there are some heavy parts in there. The manual over ride is quite a good feature too, although I'm not using it.

Excellent job

Did not work out of the box

Had this for close to 3-4 months works great with my 2019 Sprinter van so if you are looking for somthing for a late model diesel V6 sprinter this is working for me

I just opened up the package after receiving today to inspect it. First off, star taken off because china, another taken off because while inspecting, the terminals that need to be used for the battery terminals were covered with silicone. I would have to take the nuts off and thoroughly clean them along with replacing the washers and clean the studs in order to insure a good solid connection.

Day 1 - installed module and connected all wiring. Multimeter test showed everything working as designed through several on/off cycle testing.Day 2 - checked again, all working. Went to proudly show my handiwork to my wife, the module was dead. Multimeter confirmed the batteries were isolated regardless of engine on/off. Unfortunately, day 2 was also the final day of my return window. As I disconnected the wiring to remove the module, I found the ground wire was not attached. Please note that the wire was more than sufficient length, and at no time was there any strain on it. Closer examination revealed a cold solder joint (note the crystallized appearance of the solder in the photo) and that the wire was not properly soldered to the board.While I cannot judge the workmanship, cold solder joints are most commonly caused by movement of the components before the solder has had sufficient time to solidify - a matter of a few seconds. While most circuit manufacturing uses automated placement and soldering, adding the wire to the back side of the circuit board is usually a manual operation. Therefore I would suspect a rushed work environment, and question the overall management and quality control for allowing defective modules to ship. I am apparently not the first to have had problems with the ground wire.Nevertheless, based on the overall ratings, and the fact that I have already cut, placed, and drilled the wiring and mounting holes, I will purchase another, in the hopes that the odds of receiving a usable one are in my favor. Should I run into the same problem again, I will likely remove the potting, resolder the wire, and re-pot it with flex seal.