Mobile Off-Grid Architecture (MOA) has been developed with solar-powered systems as the self-electric power supply facility in desired places. For the effective utilization of MOA abilities, it is necessary to verify MOA movability and the advantages of solar system operation. The purpose of our research is to verify the effects of the method of movability usage of the MOA with its solar cell system contributing to energy efficiency. Our prototype MOA had been field-tested for its electrical power generation on the four equinoxes and solstices of the 24 solar terms in the solar year 2022–2023. We operated it manually, rotating to obtain the optimum direction for adjusting the sunlight depending on the sun’s movement, with changes in the azimuth angle and elevation angle of each of the four seasons in the solar year. As a result of the rotation, the measurement power generation values for the wall solar cell at the summer solstice of 2022, the winter solstice of 2022, and the equinox of 2023 were approximately 1.9, 1.3, and 1.3 times the estimated values, respectively, compared to the scenario where the solar cell was fixed facing south without rotation. In conclusion, the movability usage of our MOA with a wall solar cell tilted at an angle of 90° through rotation is more effective than fixed south, especially in the summer solstice.