monocrystalline silicon pv panels TUV(IEC61215,IEC61730),CE,UL,ISO 5 years quality warranty,25years life span,have insurance 1) monocrystalline silicon pv modules ... of every module are tested to guarantee high quality.7) Pv modules size can be changed according to customer's requirement ... years and under 20% decrease within 25 years. mono 190Watt pv panel