In 2010, Tohoku Electric Power began construction of a solar power plant on the grounds of the Hachinohe Thermal Power Plant in Hachinohe City, Aomori Prefecture, and began commercial operation on December 20, 2011. With a capacity of 1,500 kilowatts, it was the company’s first megasolar power plant. The site was developed by repurposing a former ash landfill from the thermal power plant, and three types of solar modules—polycrystalline silicon, thin-film silicon, and thin-film compound—were installed. The facility also served to compare power generation characteristics under the cold and snowy conditions of the Tohoku region and to accumulate operational know-how. Annual power generation amounted to approximately 1.6 million kilowatt-hours, which at the time was estimated to be equivalent to the annual electricity consumption of about 500 households. The plant continued to be used as a demonstration site thereafter and was also employed to verify technology for detecting defec ts in solar panels outdoors. The symbolic significance of this facility lies in the fact that land once used as a landfill for ash from a thermal power plant was transformed into a testing ground for renewable energy and maintenance technology.
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