Journal of the Korean Solar Energy Society 한국태양에너지학회 논문집 ISSN:1598-6411(Print) 2508-3562(Online)

For apartments with 30 or more households, the government is implementing a zero-energy building mandate from 2023 in the public sector and 2024 in the private sector. Many local governments are promoting mini-photovoltaic (PV) system supply support projects that can be installed on apartment balconies. An apartment mini-PV system is a concept that installs a PV module on a balcony and directly supplies the power from the PV to the household outlet through a plug. In this study, we analyzed real-time power consumption patterns for approximately one year for apartments in the Seoul area and analyzed the amount of power generated by mini-PV systems installed on balconies. The power consumption pattern by household and the amount of PV power on the balcony showed significant differences owing to the influence of life patterns of the residents, PV installation capacity, and installation environment. However, power consumption was the highest during the evening and summer, and balcony PV power was highest during spring and autumn. In addition, a large amount of surplus power is generated during the PV generation. The balcony photovoltaic system contributes to a household electricity energy self-sufficiency rate of 26%, on average, for four households by electricity production.