... . All our solar panels following IEC6125, IEC61730 standard, Have CE, TUV, MCS, CGC Certifications, also on Australia Clean Energy Council (CEC ... cell efficiency is 16%-18.5%. All material certificate by TUV IEC test, meet the solar panel 25 years at outdoor ... Europe Standards for Solar Energy This is TUV approval products, all the producing procedure apply TUV&UL.5. What is the Efficiency level ...