Citation :

Chatchaphon Ketviriyakit, Pasura Aungkulanon, Lakkana Ruekkasaem, "Techno-Economic Assessment of EV Charging Infrastructure in Residential Buildings in Nonthaburi, Thailand," International Journal of Electrical and Electronics Engineering, vol. 13, no. 9, pp. 33-42, 2026. Crossref, https://doi.org/10.14445/23488379/IJEEE-V13I9P103

Abstract

Rapid Electric Vehicle (EV) growth in Thailand has resulted in growing demand for EV charging station infrastructure, particularly in condominium buildings with limitations in terms of parking space, common property ownership, electrical grid capacity, and condominium juristic person regulations. However, studies on the feasibility of shared EV charging stations in residential buildings remain limited when compared to public EV charging stations. Therefore, this study aims to assess the technical and economic feasibility of installing EV charging stations in residential buildings by using a building in Nonthaburi Province, Thailand as a case study and by making comparisons between three installation configurations where Configuration 1 has two 60-kW DC charging stations, Configuration 2 has one 60-kW DC charging station and two 22-kW AC charging stations, and Configuration 3 has four 22-kW AC charging stations. Analysis used economic indicators, namely, Net Present Value (NPV), Internal Rate of Return (IRR), and payback period, under conditions where the project duration is seven years, the discount rate is 5.5%, the mean electricity price is 7.25 baht/kWh, the service durations are 4, 6, and 8 hours per day, and the electricity cost is 4.50, 4.73, and 4.95 baht/kWh, resulting in 27 scenarios. According to the findings, all three configurations were found to have financial feasibility under the specified conditions. The configuration with two DC charging stations yielded the highest return in the event that the stations were in use for eight hours per day and the electricity cost was 4.50 baht/kWh, with an NPV of 3,258,975.10 baht, an IRR of 45.52%, and a payback period of 2.04 years, while the configuration with four AC charging stations was suitable for residential buildings with long parking durations because of its lower initial capital expenditure and maintenance cost. Analysis results indicated that daily service time and the difference between the electricity price and the electricity cost were the most significant factors for project cost-efficiency. This study provided practical recommendations for building managers, investors, and policymakers to select charging technologies, pricing structures, and residential building EV infrastructure development guidelines for consistency with space limitations and utilization behaviors.

Keywords

Electric vehicle charging station, Residential building, Techno-economic feasibility, Sensitivity analysis.

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