I bought a Daly 16s 120A BMS with common port. My battery are lifepo4 16 prismatic cells. After connecting them, I only got 9.5v for P+ and P-. I tried shorting P- and B- to activate, it has no effect. I should get the same voltage as the battery (now 53v), right? I use Victron Quattro 48/3000. I am not able to inverting. I am able to charging (with some issues to discuss separately) from AC source. What is the best way to validate the BMS is in good working order?