Abstract
This paper explores ways to minimize the size of the energy storage system needed to accommodate the power difference in availability of supply and demand in a full solar charging and parking station for Electric Vehicles (EV) by best fitting the size and orientation of a set of Photovoltaic (PV) panel groups to match the charging power consumption profile of parked EVs. By grouping the PV panels into multiple (2+) strings and orienting each string accordingly, the adjusted multi orientation PV panel system could produce a better matched overall power profile that may significantly reduce the supply/charging power mismatch therefore requiring less energy to be stored in the power buffer compared to the conventional PV oriented system where all panels are orientated in a single direction that maximizes PV energy capturing. Results of a relevant case study show that the proposed method successfully increases direct power supply from PV to EV whilst minimizing the storage size needed for power buffering the supply/demand mismatch. This design method could be useful when sizing the PV installation for a solar charging station at a large car park where there is a very limited power available from the grid and most demand occurs during daytime, as is the case of a regional airport of train station used extensively by daily commuters.
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