The purpose of this study is to confirm the supporting performance of the pillars in the photovoltaic generation base mat construction method by a full-scale experiment and to reflect it in the design. The solar power generation base mat construction method is a construction method that replaces the conventionally used pile foundation and concrete block foundation when installing a solar power generation system on a slope. Through experiments, we were able to confirm the setting of the withstand load by a static load test on the column.