2005
Parent company COTECH SOLAR GROUP LIMITED founded in Hong Kong.
2008
Branch office established in Shanghai, China.
2009
Reached 20 MW cell and module production capacity.
2010
10 MW cumulative module shipments.
2011
COTECH SOLAR HOLDINGS LIMITED founded in Shanghai; TÜV certifications achieved for mono and poly modules.
2012
SINO-UK SOLAR HOLDINGS CO., LTD founded in London, UK.
2013
5 GW cumulative module shipments worldwide.
2014
Sonnigeshaus GmbH founded in Ulm, Germany.
2015
COTECH SOLAR recognised as a Well-Known Trademark.
2016
6 GW cumulative shipments.
2018
10 GW cumulative shipments.
2020
Eight dedicated departments established to strengthen operations and customer support.
2025
20th anniversary — cumulative exports reach 20 GW.