MODULAR BATTERY RACK SYSTEM

A battery rack includes a floor member having a rail portion and a carriage portion movably coupled to the rail portion. The battery rack may further include a pair of vertical walls, each having a bracket, a channel, and a movable fastener movably coupled to the channel and mechanically coupled to the bracket. Wherein the movable fastener can be configured to be in a movable state where the movable fastener is slidably movable along a length of the channel and a fixed state where the movable fastener is not slidably movable along a length of the channel at a length of the channel. The battery rack may further include at least one cross-support having a variable length and is mechanically coupled to the pair of vertical walls.