抄録
This study reports on a demonstration and survey regarding a battery control method developed by TEPCO Holdings， aimed at expanding low-voltage resource utilization for demand response (DR) without increasing costs for households under the Feed-in Tariff (FIT) scheme. The method shifts nighttime charging to the lowest-cost periods in the JEPX electricity market. A field trial involving households on time-of-use (TOU) pricing showed successful load shifting， with particularly significant effects observed among those on the “Denka Jozu” plan. However， some participants tended to prioritize self-consumption of surplus PV electricity depending on FIT rates， indicating challenges in baseline setting. According to a post-trial survey， 44% expressed willingness to participate in DR services， primarily motivated by economic incentives such as reward points and a desire to contribute to environmental goals. To further promote residential DR programs， ongoing efforts will focus on enhancing customer engagement through effective communication strategies， designing appropriate pricing schemes， and optimizing notification methods.
