December 17, 2005



Report of the Eco Products 2005

One of Japan's major manufacturers of electronic components and PV systems


Residential photovoltaic system

  • It is constructed with a unique aluminum called micro-frame, which enables solar panels to be lighter and thinner.

  • It incorporates Kyocera's high-efficiency "d.Blue" polycrystalline photovoltaic cells. With the micron-level roughness on the surface made by reactive ion etching (RIE) method, the d.Blue cells generate power with less energy loss caused by reflection.

  • Two sizes of the modules make it possible to install the PV modules on various types and designs of rooftops. Also the dark blue color PV module does not sacrifice the appearance of household, which would help to expand population of demanding solar energy users.

  • It is possible to generate about 3,810 kWh of energy annually in Tokyo by installing 3.83 kW PV modules, which accounts for 85 percent of annual electricity consumption per household.

  • Kyocera also contributes to expanding the use of solar power generations in other countries by donating PV systems to unelectricified villages in developing countries.

  • In Japan, PV installation ration is only two percent, roughly 300,000 homes, out of about 15 million homes across the country, whereas about 60 percent of them is suitable for solar power generation.

  • Installing solar panels costs about 600,000 yen (about US$ 5,040) per kilowatt. Thus, generally it costs roughly 1.8 million yen to 3 million yen (about US$ 15,292 to US$ 26,548) in total to install an average residential solar roof.

  • The government' target is to reduce residential PV system installation cost by half by 2010 to promote solar power generation. Considering solar panels can be used at least for 20 years once installed, paying one million yen for residential PV systems is roughly equal to paying the average annual electric power charge in Japan, 50,000 yen (about US$ 442), for 20 years.

  • One of the ideas to promote solar energy is solar panel leasing service so that more people can install residential PV systems at cheaper prices. Another idea is a new electric power sales business which enables people to gain rent by offering their roofs for solar power generation.

  • There is still room for improvement in existing PV modules, which are still primitive as black-white televisions, to make them more advanced as plasma televisions. For one thing, power generation efficiency should be improved to generate more power with less sunlight.

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