... the day, the water in the tank is gradually heated.Solar Collector Technical Specification: Manifold Casing Material: AluminumFrame Material: AluminumHeader Pipe ... *2752*1945*355*275CertificateEN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC, Material Vacuum ...