Kyoraku Developing Solar-tracking System for Floating Solar Plants

2019/09/13 15:43
Sousuke Kudou, technical writer
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The new float system (source: Kyoraku)

Kyoraku Co Ltd announced Sept 2, 2019, that it is developing a floating solar power generation (PV) system capable of tracking the movement of the sun.

Kyoraku (Chuo-ku, Tokyo) is a company that manufactures and sells plastic products. Currently, the company is testing the PV system at its floating solar power plant, aiming to release the system in the fall of 2020.

Kyoraku develops and sells the "Minamo Solar System" floating mounting systems for floating solar power plants. With the solar-tracking system announced this time, the entire PV system on the float rotates in the east-west direction so that it always faces the sun to increase the amount of power generated.

With one horizontal shaft, the PV system can be rotated by up to 180°. The installation angle of solar panels is fixed at 12°. Compared with solar power plants installed on the ground, the new system is expected to improve power generation efficiency (including reflection from a water surface) by about 25%. It might realize a high profitability even for projects that were unprofitable and given up in the past, according to Kyoraku.

Also, Kyoraku commercialized a new float system with a larger size and lighter weight. It can be mounted with not only 60-cell solar panels but also large-size 72-cell panels (modules). Moreover, the company will offer a special float for setting up decentralized PV inverters on the water and provide it as a solution including mooring design.

Kyoraku deals with industrial floating solar power plants including small-scale to mega solar plants. As of the end of August 2019, the company had delivered its systems to 50MW of solar plants in total. And the company is selling an increasing number of products outside Japan, it said.