Handle simultaneous charge/discharge with a BMS
I've decided to use a manual switch to either charge the batteries or put the PV array in parallel with the battery output. The idea being to take as much load off the batteries when the system is drawing current. I would do this after the batteries have been charged of course, to around 80% capacity to prolong life. BMS boards will have a maximum charge current as well as a maximum draw current so keep that in mind if anyone has a similar project.