The embodiments disclose a battery charging system having a flexible solar panel recharging system configured to deploy a flexible solar panel over an exterior roof surface while the vehicle is parked, the system includes a rear underbody deployment assembly having a motor driven winding drum for storing and releasing the flexible solar panel and a front underbody deployment assembly having two motor driven pulleys coupled to deployment wires embedded along opposing side edges of the flexible solar panel, the flexible solar panel is pulled from the rear underbody deployment assembly toward a front portion of the vehicle along guides and rails disposed along opposing sides of the vehicle body, the guides and rails elevate the flexible solar panel above the roof surface during deployment to prevent contact with the vehicle roof, electrical energy generated by the flexible solar panel is transmitted to recharge at least one vehicle battery.