Sigma’s production process is ISO 9001: 2008 certified.
The solar panels have been certified, since 2005, with the highest distinction in solar panels, with the solar keymark , (ELOT ) and are constantly tested for their best quality and efficiency.
The integrated solar systems have been certified and have received the superior energy efficiency certification from ELOT.
Sigma solar systems, have all the standards of technology because they are manufactured according to the international specifications EN 12975-1 and EN 12975-2.
