DALY 4S-16S BMS 15A to 200A Protection Board with Balance Wire and Temperature Sensor for Lithium Battery Pack（LifePO4 8S 24V,20A）

This battery monitor saved my hundreds of dollar battery and works great! This is not a project for the faint of heart. If you are going to replace a BMS please know what you are doing because it can be very dangerous. For those who do, this was an easy install and made my failed battery 100% functional again. Shopping around, I feel the price is good for the DALY reputation for quality parts vs an off brand BMS. Install was easy, it took maybe 30". Just be careful with the wires. Good luck!

Nice unit. Easy to install

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.

made a light weight battery replacement for a sports car added this as insurance to keep the pack balanced

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

Pas de surprise, fonctionne très bien comme il est prévu.

100 amp but a tiny connecting hole.. too small to use with my batteries, now I have to spend more money installing pure copper lugs of the appropriate size

Didn't try it. Seems to be quality product.