Verification / quality assurance testing Quality assurance testing Compliant Light-Soaking System This light soaking system is designed for PV module light stabilization and is especially suited for thin-film PV applications (IEC 61646). UV Preconditioning System (1SUN) Compliant with IEC61646, this UV preconditioning system is designed specifically for thin-film technology PV panels and ensures uniform irradiation. UV Preconditioning System (1 to 5SUN) Compliant with IEC61646, this UV preconditioning system is designed specifically for thin-film technology PV panels and ensures uniform irradiation.