A golf car canopy extension panel that is connectable to a canopy main panel, wherein the extension panel comprises a first extension longitudinal water channel that is fluidly connectable to a first main longitudinal water channel main panel, and a second extension longitudinal water channel that is fluidly connectable to a second main longitudinal water channel of the main panel, wherein the first and second extension longitudinal water channels each comprise a termination end structured and operable to direct water to exit the respective extension longitudinal water channel at an end of a sidewall of the respective extension longitudinal water channel.