Sunerg XM 72/156 series I+ Monocrystalline photovoltaic module 260 Wp Intelligent PV Module The XM 72/156 Serie I+ is one of a wide range of Sunerg products. It is realized accord the IEC 61215, IEC 61730 electric laws and CE european rules. The 3 Bus Bar cells are fixed with new induction technology to warranty a better performance, and a long lasting electric power. The warranty is for 25 years for a powerful output of 80% in comparison to the starting power and 10 years on the products. Ar coating glass availability and intelligent PV module. First class fire resistance UNI 9177