What can be done to increase the use of solar cells in Japan ? 2011 October 18 Hikaru Anma
light energy Solar cell electric energy ・ greenhouse gas is not generated ・ The electricity can be used at the time of a disaster. ・ The surplus electricity can sell. advantage of solar cell
The diffusion rate of the solar cell in Japan The increase in the number of introduction The number of introduction up The number of the introduction households (2008) 520,000 houses But 1.1%
Power consumption of household per one month ① An introductory cost is high about 280 kWh 1kW system \600,000 ~\800,000 yen 3kW system introduction cost The production of electricity for one month (3kW system) about 270 kWh \1800,000 ~\2400,000 yen \ 48,000 yen/kW The sum total of cost Subsidy(2011) \1650,000~\2250,000 yen
Sales value of electric power \ 42 yen / kW \ 65 yen / kW take time to get my money's worth 15 years 9 years cost of solar cell \ 2000,000 The rate of solar power 0.2 % The rate of solar power 2.0 % ② To take time to get its money’s worth
③ generating efficiency 18.6 % The best generating efficiency Silicon solar cell Shikoku regions 3450 kWh 2908 kWh Hokuriku regions 500 kWh The rise of power generation efficiency becomes important.
Conclusion Development of a solar cell with high conversion efficiency large electric power can be obtained in a small area. reduction of cost Present Subsidy Sales value of electric power Solar cells will spread in Japan