DALY Smart BMS 4S-16S 40A-500A with WiFi Module and CAN 485 Communication Protection Board for LifePO4 Lithium Battery Pack (Smart BMS 16S 48V，200A)

Small form factor 4S 100A made to fit Blue Carbon battery. After years of not loving the old BYD batteries daly saved the day. Exact fit for the troublesome Blue Carbon LiFePO4 batteries.

Muy bien

Product is defective. Danger, this piece of crap can burn your house down. It does not prevent overcharging, allowing the cell voltage to increase beyond the limit, which can cause overheating and eventually combustion. It also does not balance the cells which agravates the problem. It's not that this specific unit has a problem, it is a design defect. It should be taken off the market. You wonder how ebikes catch on fire? You are looking at the cause. I am an engineer with 25 years experience, yes it was hooked up correctly, and tested extensively. You can check ebike forums for verification on what I am saying. The unit has a QC sticker on it which indicates to me they know it is defective, either that or they don't test anything and put a phony Quality Check label on it. I wish I could sue the company for my damaged battery and lost time. At least I can warn others. Don't be fooled by the slick marketing and fancy website of this scam company. Don't Buy! Your life may depend on it.

i got 4 of these to maintain 4 banks of 320ah lifepo cells, 16 total, 4 per pack. it was very aggrivating trying to install these with little to no documentation, yea, there's videos but they dont really go into much detail. to all buyers, know this, "THEY WILL NOT ACTIVATE UNTIL YOU PUT A CHARGE TO THEM. this does not matter if your cells are pre-charged for storage or not. once there is a push to them through the bms, they will come alive. however, without putting a charge to the bms/battery bank, they will NEVER come online, and they will NEVER be seen by the APP. it was very aggrivating that i couldnt check the bank before connecting it to my system. i had to build the bank, and hope for the best then connect it up and attempt a charge.. before i could even see the bms.. which sucks from an engineering standpoint. also keep in mind, these bms do get hot, they do not have a built in cooling fan..something to consider.. they maybe only 100 amp, but they do get hot when they are pushed to 80-90 amps.. otherwise, once they are up and running, they do pretty good. i've had them on a 43 foot sailboat behind a victron 3k-watt inverter, and they doing great.. just wish they would make it do MPPT modbus over tcp.. its a basic protocol, so i dont know why they dont do it. it would also help if the wireless module wasn't just bluetooth. so i'm building a esp32 gateway to convert ra485 to mppt modbus so that i can read them with my victron cerebro gx.will buy them again if i ever build another cell bank..

The media could not be loaded. Very small size BMS ideal for tight applications. Tested low and high temp disconnect and low and high cell voltage and battery voltage. It worked. It does not have active balancer so ideal for matched cells that only need top balance. Easy to install and ideal if you want to connect your own cables to it with ring connectors. All settings can be changed through Bluetooth however I only mess with cell voltage disconnect and temp disconnect settings. I have now 4 Daly BMS and all connect to the app very well when battery is active if not a short tab on Bluetooth button activates it. Hope this helps!

Does what it has to do, I only use it for 50% of the capacity

I have had an earlier model of this BMS for three years and have had zero problems. I decided to get this updated model for a new battery pack and it is working well too. Initially, I ordered the version without Bluetooth, but the seller was easy to communicate with and quickly refunded my money so that I could order the correct part.

I will be returning this BMS. My no-name from Alibaba is far easier to use and configure and the app is much better. Also this BMS doesn't have a separate charge input, so when the unit is 'full' and disconnects the battery, anything connected may be exposed to full charger voltage (solar, battery charger, whatever). The balancing function seems subpar and the app is so confusing/unclear as to what's actually going on that I sought out another unit to try on this pack (110Ahr LiFePO4).The BMS needs to be woken up via a button press on the bluetooth/WiFi module if it has sat for too many hours...which makes me feel like it just tagged on there and not properly integrated. My no-name BMS systems have no such need for a wake intervention (and don't have standby battery draw that is significant).If I had got this for free, I'd probably find a use for it somewhere but having paid money for it, I'll send it back.Also note that the connector for an external UART/RS485 screen is the smaller version and won't connect to the screen's native connector if you have a straight-across cable. I was going to search one out but honestly the 'fuel gauge' in the app is useless anyway.