DALY 4S-16S BMS 15A to 200A Protection Board with Balance Wire and Temperature Sensor for Lithium Battery Pack（Li-ion 13S 48V,15A）

Good Simple BMS and it's tiny for a 29.4v 60A. I've used two of these so far on 7S 70ah Li-ion battery packs for my grandchildren's 24v ATVs. Only needed 30A draw but I like to double that for a BMS to be sure it lives a long life. I also run 5 amp flying capacitor type balancers on battery packs over 10ah. Otherwise it would take a week for the BMS to top balance a 70ah pack.

It was a little oversized for what I needed so I trimmed the heatsink down with a grinder and removed the waterproof cladding and even after mutalating it, it still worked. They include thermal pads instead of paste which is wonderful for this application and allowed ease of reassembly. I used mine for a 10S4P set up for a 36V E-Bike (van moof S3 battery). The included sense wires were plenty long. I even installed it wrong the first time and had to splice my wires with what I cut and still had enough for some left over. It charges, it discharges. I haven't used it long enough to monitor if it's maintaining the cells well but from the what I know of electronic circuit design it should be almost infallible. I'll update this if it has any packs of cells die. I am going to buy another for my next battery pack. I already have it sealed back up in the original van moof casing and am not unsealing it for a picture dang it. Look up van moof S3 battery and you'll see how space constrained I was. Oh and one last thing, the short protection for sure works and doesn't kill it immediately. I cut the leads to make them shorter to attach an XT-60 and I did it at the same time and shorted it with my snippers. It didn't die and still works after LOL

Purchased over 30 of these now and all are working fine

Had to send the first one I bought back, It was reading slightly lower voltage on the output wires than the pack. Once I put load on it, there was no power. For some reason the BMS was shorted /triggered from the factory, I tried turning the bike on multiple times and could not get it to work. I returned it and got another one, This time it was able to come out of it after 3 times turning the switch off and on. I have had other DALY BMS' in the past that did not have this trouble out of the box....

I purchased 4 of the 4S 100 amp BMS's to replace two failed BMS's (after 4 years) on the four 12.8v LifeP04 batteries I am using in my 48v riding mower. I cut open the batteries and the four cells all tested good. I looked for an inexpensive basic BMS with no frills like the ones they came with had and I settled on these (they are four times smaller than the OEM BMS's) they were simple to wire (I spliced into the existing wires on each cell). I did not use the main leads that came with I used the 4 ga. leads that were already there. I replaced these batteries in my mower and it works outstanding. I will soon replace the other 2 BMS's now that I know how well the first two worked.

Totaly trash, don’t buy this kind of bms on discount 13 cells 48 volts 40 aps . they goes on sleep mode after tree days of no use, Unless you wanna unwrap the battery to reset it is what l been doing every time when this happens Unplug the bms and plug it back to meke it works

The delivery man left my package behind the first door of the building. He must have been buzzing and had it at least brought into the lobby of the building because there are many missing packages.

Does what it says in the ad. Does not have bluetooth. If you want bluetooth buy something else.