DALY BMS 200A 4S - 8S Built in Bluetooth 1A Active Cell Balancing RS485 CAN for 12V - 24V LiFePO4/Li - ion/LTO Battery Packs Perfect for RV, Portable Power Station, Trolling Motor

High quality and worked great on my battery rebuild. The balancing is great and uses very low power. The app is OK and functional but could be improved.

Viene incompleto, vino sin la antena para conectar con el teléfono 😔

This is a neat, compact BMS. Get the package with all the WiFi and RS485 connectors as they are expensive as add ons.My cells were out of balance when I built my 330a/12v pack and the balance function has kept them at within .005v now after just a few battery cycles. I set mine to come on at 3.45v and .010v deviation. With the app its easy to see if/when to enable or disable the balance function. Andy from Off-Grid Garage did not have a good experience with this BMS but I am finding it to be working very well so far.The BMS works well enough with the app on BT and WiFi but you MUST change the Parameter Settings/Cell Characteristics/Sleep Waiting Time to 65535 seconds if it is to stay alive through a full day cycle. It comes set for 3600 sec and won't wake up unless the power is cycled on/off, what a pain.The Daly app works on this as well but on my older Android phones, the app crashes before it loads.UPDATE: I have been having trouble keeping the wifi connected to this with the optional wifi dongle. After a long back and forth wit the seller of the dongle, I discovered that the UART connector on the BMS has failed, and upon attaching the dongle cable plug into the UART jack, it moves and gets pushed inside the BMS. So it must have been a manufacturing defect that the jack was not soldered properly to the BMS printed circuit board. My UART and Wifi will never work again on this BMS. Buyer beware if you are counting on using wifi, there is this danger/manufacturing weakness. The internal bluetooth still works as does the RS485/CAN connector. Removing one star for quality of the BMS issue.