Provided is an EV charging station comprising a housing, one storage battery, a substantially flat panel, an array of photovoltaic modules and a control unit. The housing receives electric power from a power grid. The substantially flat panel is attached to the housing. The array of photovoltaic modules are affixed to the flat panel and converts solar energy from sun light into electrical energy, and transfer the electrical energy to the storage battery in the housing. The control unit receives a first signal indicating the power grid is overloaded and not available to the EV charging station; in response to receiving the first signal, determining whether the storage battery is charged; and in response to the determination that the storage battery is charged, switching the EV charging station to a charge mode where the storage battery is used, instead of the power grid, to charge an EV.