An electronic parking meter mechanism for inserting into a parking meter assembly is provided. The mechanism includes an inner housing, a payment receiving structure located on the inner housing, a user input device located on the inner housing, and an electronic display screen supported by the inner housing. The mechanism includes a front shelf and a front solar panel coupled to the upper surface of the front shelf. The mechanism may also include wireless communications hardware supported by the inner housing configured to wirelessly communicate with a parking management system.