...
Could use 3 BMSs for this configuration or just one.
Someone else's solution
Battery
...
Solar Charger
ALLPOWERS 20A Solar Charge Controller Solar Panel Battery Intelligent Regulator with USB Port Display 12V/24V
What battery type is this controller supported?
A: (1)B-01=LEAD-ACID, 12V; B-02=LITHIUM ION 3s, 3*3.7V=11.1V; B03=LIFePO4 4s, 4*3.2V=12.8V. (B01 is the default type, If you would like to to switch to another 2 types, please select it manually.)
Could charge the battery with by adding a power supply to mimic the solar panel.
Max Input: 18V, 320W, 17A
Battery Examples
Tesla's Power Wall
...