BATTERY PACK ASSEMBLY

A battery pack assembly comprises a battery enclosure having a first side panel, a second side panel, a third side panel, a fourth side panel, a top panel, and a bottom panel defining a module containing volume. The battery pack assembly may contain a plurality of battery modules in the module containing volume, the plurality of battery modules having a first battery module, a second battery module, and a third battery module. The first battery module and the second battery module are positioned in a first orientation and stacked to form a column of battery modules and the third battery module is positioned in a second orientation and positioned adjacent to the column of battery modules.