Associated Equipment Multi-Battery Bus Bar Set for parallel charging has a 10-battery capacity, though additional bars can be combined for added capacity. The unit features 3' (4 AWG) cables to connect to a charger or additional bus bars, and the insulated-fiberglass backboard comes with 10 pairs of 3' (10-gauge) DC charging leads with insulated, 300-amp safety clamps. This bus bar is also designed to be used with Associated's model 6065 and 6068 parallel battery chargers.