Our solar panels are made of crystalline solar cells. This technology has been proven to work reliably through worldwide projects which have been in operation for decades. Our solar panels are manufactured by the world’s largest manufacturer of solar cells and panels. They carry the performance and reliability certifications required for sale of solar panels in Europe and North America. The certification tests are performed to IEC61215, IEC 61730, and UL1703 standards. Our solar panels are guaranteed for +/-5% rated power at the time of purchase and carry 10 year product warranty, 90% power warranty for 10 years, and 80% power warranty for 25 years.