Second-Life Battery Supported PV–EV Charging for Workplaces: Optimal Sizing and Feasibility Assessment
9th International Conference on Mathematical Advances and Applications (ICOMAA-2026), İstanbul, Türkiye, 6 - 08 Mayıs 2026, cilt.9, ss.1-10, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 9
- Basıldığı Şehir: İstanbul
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.1-10
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Yıldız Teknik Üniversitesi Adresli: Evet
Özet
This paper presents an area-constrained multi-objective sizing and feasibility framework for photovoltaic (PV)-supported workplace electric vehicle charging stations (EVCSs) integrated with second-life battery energy storage systems (SLB-ESSs). The study addresses a key methodological issue in workplace PV-EV charging applications: excessive overlap between PV generation and daytime charging demand can make a PV-only baseline appear highly self-consuming, thereby masking the marginal value of storage. To obtain a more meaningful storage assessment, PV capacity is selected as a feasible high-penetration design constrained by rooftop/parking-area availability, inverter/connection limits, and PV-load temporal overlap. Under this common PV basis, SLB capacity, inverter capacity, and EVSE count are optimized using NSGA-III by minimizing net present cost and operational CO2 emissions while maximizing self-sufficiency. The framework is evaluated for a Turkish workplace case using hourly PV simulation, stochastic EV charging demand, heterogeneous SLB state-of-health modeling, and life-cycle economic analysis. The selected PV design reaches 227.27 kWp and, in the PV-only case, yields 64.97% SCR with 119.07 MWh/yr exported energy. With SLB integration, SCR increases to 77.23%, SSR reaches 87.94%, and operational emissions decrease from 36.75 to 17.62 tCO2/yr. Economically, the optimized PV+SLB+EVSE system reduces net present cost from 14.43 to 9.39 million TL relative to the PV-only configuration while maintaining full EV demand satisfaction. The findings indicate that second-life storage is most valuable in workplace charging sites where high PV penetration creates surplus energy that would otherwise be exported at limited economic value.