An electrical system includes cables, a DC charge connector, first and second battery modules, a splice device, and a controller. Each battery module has first, second, third, and fourth electrical connectors receiving a respective one of the cables. The battery modules are connected to each other via the cables, and further have first, second, third, and fourth switches that connect battery cell strings to one or more connectors. The charge connector is connected to one of the cables between the first electrical connectors. The splice device connects the charge connector to the first connector of the first battery module and to a pair of the cables. A charging current may be split between the battery modules. The controller selectively establishes parallel charging, parallel drive, and separate drive and charging modes for each battery module. The system may have an independent drive mode.