I have purchased 6x used Toshiba SCiB LTO modules connected to my 6000XP. They come with their own built-in BMS. The module is FM01202CCA04A; I'd provide a link to Toshiba's site but the forum doesn't allow that. As of right now, I have them configured in lead acid mode, but it'd be great if I could actually communicate with the BMS modules.
As far as I understand, their documentation implies the protocol is called "BMU-2G". I found a PDF which appears to be in-depth documentation on how it works, though again, I'm not allowed to provide a link. If you google search "toshiba bmu-2g pdf" you'll find it immediately.
When checking the battery compatibility list, I don't see anything that slightly resembles it. Perhaps one of the others are similar enough to work but I don't know which that would be.
Any suggestions?