solar energy Our solar collectors differ:we adopt entire copper or aluminium plate as the absorption core,while,other factories gather several separated sheets together as the absorinstead.Moreover,our absorption coating is chrome plated,which is our patent.Last but not the least,We adopt laser welding instead of traditional ultrasonic welding.It will make sure a long life time.  Cover Thickness3.2mm tempered glass3.2mm tempered glass4.0mm tempered glassCover Transmission>94%±2%>94%±2%>94%±2%Emission<6%±2%<6%±2%<6%±2%Weight35Kg30kg28kgAbsorber MaterialCopper tube,copper platecopper tube,aluminium platecopper tube,aluminium plateSuiface coatingblack chromeblack chromeblack chromeWeldinglaser weilding laser weilding laser weilding Emissivity<4%<4%<4%Riser materialcopper TP2\CA1220copper TP2\CA1220copper TP2\CA1220Work pressure0.6Mpa0.6Mpa0.6MpaTest pressure1.2Mpa1.2Mpa1.2MpaThermal insulationFramealuminiumaluminiumaluminiumBack board0.4mm antirust aluminium sheet0.4mm antirust aluminium sheet0.25mm zinc laser sheetQuality certificationWarranty time5 years 5 years 5 years Service time15 years15 years15 yearsCertificationCE,SGSCE,SGSCE.SGS

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