It collects variously with the battery, the solar battery, and the wave activated generator.
The waves energy and the sunlight energy are used, and moreover,
a hybrid power supply where effectively it uses and a steady power supply is supplied can generate electricity
with the solar battery at fine weather of the wave activated generator and use the power supply of high power at stormy weather.
A hybrid power supply is used as a charging device for measuring equipment used in Okinotorishima,
the southernmost island of Japan, and as a buoy power supply for the US Coast Guard.
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