A composite liftgate system for a vehicle, comprising: an inner panel that is a glass-filled polypropylene; an outer panel having an upper outer panel and a lower outer panel connected to the inner panel; a lower trim panel connected to the inner panel; a strengthening channel pattern arrangement including a plurality of structural channels (24, 26, 28, 30, 32, 33) formed in the inner panel to manage loading paths applied to the inner panel; a plurality of additional structural reinforcements (64, 66, 68, 70, 72) located in at least a portion of the plurality of structural channels (24, 26, 28, 30, 32, 33); wherein the outer panel is connected to the inner panel through use of at least structural adhesive; characterized in that the composite liftgate further comprises: a plurality of composite preforms (36, 38) connected to the inner panel to add structure in at least a strut and upper corner area of the inner panel, where at least a portion of the plurality of composite preforms (36, 38) are additionally connected to one another in an overlapping manner; a plurality of fasteners further holding the upper corner area composite preform in position; a plurality of reinforcement brackets (44, 48) connected to the plurality of composite preforms(36, 38); and wherein at least a portion of the plurality of composite preforms (36, 38) and/or plurality of reinforcement brackets (44, 48) are connected to the inner panel through the use of at least structural adhesive. an inner panel that is a glass-filled polypropylene; an outer panel having an upper outer panel and a lower outer panel connected to the inner panel; a lower trim panel connected to the inner panel; a strengthening channel pattern arrangement including a plurality of structural channels (24, 26, 28, 30, 32, 33) formed in the inner panel to manage loading paths applied to the inner panel; a plurality of additional structural reinforcements (64, 66, 68, 70, 72) located in at least a portion of the plurality of structural channels (24, 26, 28, 30, 32, 33); wherein the outer panel is connected to the inner panel through use of at least structural adhesive; characterized in that the composite liftgate further comprises: a plurality of composite preforms (36, 38) connected to the inner panel to add structure in at least a strut and upper corner area of the inner panel, where at least a portion of the plurality of composite preforms (36, 38) are additionally connected to one another in an overlapping manner; a plurality of fasteners further holding the upper corner area composite preform in position; a plurality of reinforcement brackets (44, 48) connected to the plurality of composite preforms(36, 38); and wherein at least a portion of the plurality of composite preforms (36, 38) and/or plurality of reinforcement brackets (44, 48) are connected to the inner panel through the use of at least structural adhesive. a plurality of additional structural reinforcements (64, 66, 68, 70, 72) located in at least a portion of the plurality of structural channels (24, 26, 28, 30, 32, 33); wherein the outer panel is connected to the inner panel through use of at least structural adhesive; characterized in that the composite liftgate further comprises: a plurality of composite preforms (36, 38) connected to the inner panel to add structure in at least a strut and upper corner area of the inner panel, where at least a portion of the plurality of composite preforms (36, 38) are additionally connected to one another in an overlapping manner; a plurality of fasteners further holding the upper corner area composite preform in position; a plurality of reinforcement brackets (44, 48) connected to the plurality of composite preforms(36, 38); and wherein at least a portion of the plurality of composite preforms (36, 38) and/or plurality of reinforcement brackets (44, 48) are connected to the inner panel through the use of at least structural adhesive. a plurality of composite preforms (36, 38) connected to the inner panel to add structure in at least a strut and upper corner area of the inner panel, where at least a portion of the plurality of composite preforms (36, 38) are additionally connected to one another in an overlapping manner; a plurality of fasteners further holding the upper corner area composite preform in position; a plurality of reinforcement brackets (44, 48) connected to the plurality of composite preforms(36, 38); and wherein at least a portion of the plurality of composite preforms (36, 38) and/or plurality of reinforcement brackets (44, 48) are connected to the inner panel through the use of at least structural adhesive.