Grid-Connected Renewable Energy–Based Electric Vehicle Charging Station

Abstract: The rapid electrification of road transport is increasing the demand for dependable electric-vehicle (EV) charging infrastructure. Conventional grid-only charging can increase feeder loading, peak demand and dependence on carbon-intensive electricity. Grid-connected renewable-energy charging stations provide an alternative by combining photovoltaic (PV) generation, power electronic converters, optional battery energy storage, intelligent energy management and a utility-grid interface. This literature review synthesizes research on the architecture, operating modes, control methods, grid interaction, energy storage, charging strategies and future directions of renewable-energy-based EV charging stations. Recent reviews consistently identify PV-grid systems as attractive because the grid can maintain charging availability when renewable generation is insufficient, while PV generation can reduce imported energy during periods of solar availability. Research also emphasizes MPPT, bidirectional converters, smart charging, demand response, vehicle-to-grid (V2G), forecasting and optimization. The reviewed results indicate that the most practical near-term architecture is a grid-connected PV station with a coordinated energy-management controller and, where economics justify it, battery storage. Remaining challenges include renewable intermittency, power-quality constraints, high-power fast charging, interoperability, battery degradation, cybersecurity and optimal sizing. The review concludes with a conceptual station architecture and research recommendations for reliable, low-carbon EV charging.