1. (1) International Energy Agency Photovoltaic Power Systems Programme: “TREDNDS IN PHOTOVOLTAIC APPLICATIONS 2020”, Report IEA-PVPS T1-38 (2020)
2. (2) New Energy and Industrial Technology Development Organization: “China's Renewable Energy Policy and Situation during the 13th Five-Year Plan” (2020)
3. (3) European Commission: “Energy Road map 2050” (2012)
4. (4) The Nikkei: “California, USA, Mandatory Solar Panels for New Homes”, (12/07/2018)
5. (5) KYUSHU ELECTRIC POWER CO., INC.: “About output control of renewable energy in mainland Kyushu” (2018)