電気学会論文誌B(電力・エネルギー部門誌)
Online ISSN : 1348-8147
Print ISSN : 0385-4213
ISSN-L : 0385-4213
論文
わが国における太陽電池の価格低減に対する研究開発と導入助成の費用対効果
遠藤 栄一
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ジャーナル フリー

2016 年 136 巻 2 号 p. 161-169

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This paper analyzes contribution ratios of technological progress and mass production effects, and cost-effectiveness of R&D and subsidization from the viewpoint of solar cell price reduction in Japan. For the analysis, contribution ratio of mass production effects by scale merit and learning-by-doing is estimated based on annual and cumulative production of solar cells and allocated into subsidy, net-metering, Feed-in Tariff and secondary effects of R&D. Contribution ratio of technological progress is estimated based on correlation between solar cell price reduction and technology knowledge stock after removing mass production effects estimated as their contribution ratio. Cost-effectiveness is analyzed based on the estimated contribution ratios and R&D expenditures and subsidy. The results of the analysis show contribution ratio of technological progress, which is contribution ratio of R&D, is around half of the total price reduction. Contribution ratio of mass production effects is around quarter and mainly based on subsidy and net metering. Cost-effectiveness of subsidy was higher than that of R&D initially, but it has dropped rapidly. In 2000s, cost-effectiveness of R&D became higher than that of subsidy. This means R&D should have been allocated more expenditures, especially on crystalline silicon solar cells, which could decrease solar cell price more cost-effectively.

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