The P090A cable connects the Apex 300 to the B500k but the literature suggests to use only the CA90 cable for the connection which is entirely too short for the application. Is it forbidden to use the P09A cable to connect the Apex 300 to the B500K?
I am interested in this answer as well. Although I have not seen any Bluetti photos of B500k’s directly to the Apex, I have seen many photos of the Apex and 4-5 batteries, two of which are under the Apex via the short cable, with the other 1, 2, or 3 batteries connected to that group with the longer P090A, bottom battery to bottom battery, but the shorter cable connecting any other batteries in that second stack.