Switching to Lithium with limited product availability

Thanks a lot! (again). I incorporated everything in my design and will look for availability of the products. Good to know that I at least will be able to get everything to work with what’s here.
PS: The MPPT in the image is a Victron SmartSolar MPPT 150/85-MC4 VE.can (12V) to charge from solar. I may be able to connect the BMS to this using the VE.can connection in order to get the negative connected, but I am not sure that is the same connector, or if it will work, or it may could cause harm.

Here’s my new design for anyone reading along.