Abstract
Electric buses consume a considerable amount of energy during charging, which inevitably increases the maximum demand (MD) on a system. We have therefore developed a model to investigate the techno-economic feasibility of solar energy for an electric bus depot. The influence of the bus charging routine (BCR) on the techno-economic performance of solar PV systems was investigated. After applying the BCR, results from simulation software provided the optimal hybrid grid-connected PV (GCPV) system of 850 kWp capacity. The cost of energy (COE) and net present cost (NPC) for this system are 0.434 MYR/kWh and 13.3 million MYR, respectively, notably lower than the existing conventional grid system (0.48 MYR/kWh and 14.7 million MYR, respectively). This optimised system significantly reduces the MD by 450 kW and CO2 emission by ∼38% per year. The configuration based on 850 kWp was designed and sized using design software to deliver 3.19 kWh/kWp of energy per day, and to provide a performance ratio (PR) of 82%. Overall, the GCPV system with the BCR is the most feasible option in techno-economic terms, which can reduce the operational cost and carbon emissions in order to develop sustainable transport throughout the region and beyond.
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