In this study, we aim to evaluate the effect of reduction of the outside air load of a natural energy ventilation system and also determine the energy independence of solar power generation and storage with respect to the actual power demand. To this end, measurements of a residential wooden detached house located in Hino City, Tokyo, were performed., Based on the residential data obtained through the measurements, we evaluated the energy independence of the natural energy ventilation system and the solar power generation and storage system. Although the thermal collection efficiency of the roof thermal collection surface decreased owing to the installation of the solar power generation panel, the ventilation operation proved effective in reducing the outside air load. Additionally, while the average annual energy independence rate was 27 %, the average annual energy self-sufficiency rate was 90 %.
