... twin-glass solar tubes; 2) Copper heat pipes for rapid heat transfer; 3) Easy plug-in installation; 4) ... day, the water in the tank is gradually heated.Solar Collector Technical Specification: Manifold Casing Material: AluminumFrame Material: ... 1945*355*275CertificateEN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC,EN12975-SOLAR KEYMARK,SRCC, ...