https://grtgroup.swiss/wp-content/uploads/2018/06/World-Alliance-logo.png6262048grtgrouphttps://grtgroup.swiss//wp-content/uploads/2018/01/ic_logo-1.pnggrtgroup2018-06-05 00:00:002019-04-05 16:29:41GRT Group becomes a member of the World Alliance for Efficient Solutions promoted by the Solar Impulse Foundation