Multi-level Hill Transformed Into Slope at Island Solar Plant
Innovative measures for environment, soil in remote island
Fukuejima, the largest among the Goto Islands, is located at the southwest end of the Goto Islands in western Nagasaki Prefecture, Japan (Fig. 1). It has an area of about 326km2 and a population of over 30,000 people. The island can be accessed from Nagasaki and Fukuoka by air and sea and functions as the hub to connect the Goto Islands to each other by sea.
The "Sun Farm Nakamura Goto," a mega- (large-scale) solar power plant with a solar panel capacity of about 1.25MW and a grid capacity of 1MW, is located almost in the heart of the island (Fig. 2). Approximately four years have passed since the plant began power generation in March 2016. Generated power is sold at 36 yen/kWh (excluding tax) to Kyushu Electric Power Co Inc based on the feed-in tariff (FIT) scheme.
Nippon Comsys Corp Group, which primarily deals with telecom infrastructure, developed and operates this mega-solar power plant. Nippon Comsys provided engineering, procurement and construction (EPC) services, and operates and maintains the power plant. The power producer is Comsys Create Corp (Shinagawa-ku, Tokyo), a subsidiary that develops new business for Nippon Comsys.
The mega-solar plant on Fukuejima adopted polycrystalline silicon-type solar panels of Hanwha Q Cells Co Ltd and PV inverters manufactured by Toshiba Mitsubishi-Electric Industrial Systems Corp (TMEIC).
Nippon Comsys has adopted crystal silicon-type solar panels of various manufacturers at all of its power plants excluding CIS chemical compound-type panels adopted at the 1.8MW-output project in Azumino City, Nagano Prefecture, and TMEIC PV inverters at 17 of its projects, excluding two projects with an output of about 12.7MW and 2MW in Rifucho, Miyagi Prefecture, and Ebetsu City, Hokkaido, respectively.