DALYSmart BMS 4S 12V 100A with WiFi Module and CAN 485 Communication Protection Board for Remote Monitoring of LifePO4 Lithium Battery Pack

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

Works great.Percentage remaining drops by about 8-10% per day when trickle charging, with no drop in voltage. Eventually it hits zero. This is an algorithm problem, the cells are fine and keep their voltage.

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!

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.

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.

Easy to use, easy to setup, compact design, seamless installation. Highly recommend! Quality product at a great price. I will definitely buy this again！

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..

Got this on 2 of my lithium battery banks. Works really well, easy to access over WiFi and/or Bluetooth. The version I got came with the WiFi and I added the Bluetooth adapter that came with the separate balancer. Together they work seemlessly and are doing exactly as they should be doing.