国内で最大規模となる太陽光ファンドが登場 − ファンド規模は最大900億円を見込む。運用期間は約20年で、年平均の利回りを示す内部収益率（ＩＲＲ）は5.5％を想定。日本生命保険が100億円の投資を決めており、長期の資金運用先を求める生命保険会社など機関投資家から資金を呼び込む。
The largest solar fund in the country will appear – Fund size is expected to be up to 90 billion yen. The operation period is about 20 years, and the internal rate of return (IRR) showing annual average yield is assumed to be 5.5%. Nippon Life Insurance has decided to invest 10 billion yen and attracts funds from institutional investors such as life insurance companies seeking long-term fund management.
http://www.dbj.jp/ja/topics/dbj_news/2017/files/0000027691_file1.pdf