| Jan.2001 | Green Tec Co.,Ltd. founded. |
|---|---|
| Started sales of residential solar power systems from MITSUBISHI Electric Corporation. | |
| Jun.2006 | Tokyo office established. |
| Dec.2006 | Overseas business division established. |
| Mar.2007 | Attained position as top Japan domestic dealer of residential solar power systems from MITSUBISHI Electric Corporation. |
| Jul.2008 | Local Korean company Greentec Energy Co., Ltd. Founded. |
| Sep.2008 | Completed construction and began operation of Greentec Energy Co., Ltd.'s self-owned 300kW solar power electric generating plant. |
| Jun.2009 | Support center established. |
| Dec.2009 | Tokyo Sales Office name changed to Tokyo Branch. |
| Jan.2010 | Started sales of residential solar power systems from Canadian Solar Inc. |
| Feb.2010 | Osaka branch established |
| Apr.2010 | Began sales of residential solar power systems from TOSHIBA Corporation. |
| Jan.2011 | Green Tec Co., Ltd. 10th Anniversary. |
| Mar.2011 | Fukuoka Sales office established. |
| Jun.2011 | Sendai Sales office established. |
| Sep.2011 | Nagoya Sales office established. |
| Oct.2011 | Shanghai office established. |
| Dec.2011 | Green Tec Co., Ltd. announced new brand "XSOL". |