| Title |
Economic Assessment of Self-Consumption PV-Based On-Site PPA with ESS Integration |
| Authors |
박대현(Dae-Hyun Park) ; 박혜연(Hae-Yeon Park) ; 최성산(Sung-San Choi) ; 이영호(Young-Ho Lee) ; 박성원(Sung-Won Park) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.2.433 |
| Keywords |
Renewable energy 100; Power purchase agreement; Energy storage system; Photovoltaic |
| Abstract |
This study evaluates the economic feasibility of integrating an energy storage system (ESS) into a self-consumption photovoltaic (PV)-based on-site power purchase agreement (PPA) model for RE100 consumers. To this end, the optimal ESS capacity was derived under a 1:1 PPA structure, using actual electricity rate structures, contract demand, and historical electricity consumption data from a real consumer. A case study was conducted for an RE100 consumer with an annual electricity consumption of approximately 383 GWh. The results showed that economic can be achieved even with a fixed contract price of 200 KRW/kWh, based on the 2025 energy charge structure. In addition, the integration of ESS was found to be economically infeasible due to high initial investment and O&M costs. However, participation in multiple demand response programs showed that economic feasibility can be achieved, with a maximum net profit of 9.8 billion KRW and a benefit?cost ratio of 1,812, over the life of the battery. |