For what its worth, I just recieved 4 more units and the DIP blocks are red..
From what I can tell there have been 3 variants of the BMS shipped wihtout any specific versioning changes in labels or documentation...documentation
- A) MARK 1 - The original with the Blue DIP block, data-rich LCD homescreen and RJ11 port for inverter connection (CAN only), BMS Made by Shenzhen Daren High Tech
- B) MARK 2 - Blue DIP Block, Basic LCD homescreen with battery icon and RJ45 port for inverter connection (CAN/RS485), BMS made by Shenzhen Kesheng Power Technology
- C) MARK 3 - Red DIP Block, data-rich LCD homescreen (same as Mark-1) and RJ45 port for inverters (CAN/RS485), BMS origin TBD
I have 2 Mark-2's I purchase December 2023 and did a quick test to see if they communicate with the Mark-3's and no luck yet, There is something different about the latest ones that make them incompatible with earlier versions. Not sure if its major changes in the protocol used for slave-master parallel communication or what.
@Solar Moose I also noticed that the LCD on the new ones never shuts off... it is on all the time while the BMS is powered on which is not ideal. There is definitly software that can allow-us to update firmware but weather AOLithium will go that route is an unknown.