Vacuum Tube Solar Water Heater (SP-470-58/1800-30)

Specifications1)Inner and outside water tank shell all are made of SUS304 food grade stainless steel plates, welded by argon arc. Water is pure and drinkable. Inner tank thickness is 0.4mm, the highest thickness for SP-C direct insert lower pressure can be 0.8mm.2) Heat insulation of water tanks adopts polyurethane foam and the thickness is 55mm3) Silicon rings to connect and seal them4) The tubes and supports are adjustable. The power bearing is average and can assure the vacuum tubes to use for a long time5) Whole glass vacuum tubes adopt super hard borax and silica glass6) Absorption rate: =93%, thermal radiation rate: =6%7) It resists 25mm hail and the using life can last 15 years8) Temperature when exposed to sun without water: 250,2.5 hours to boiling point if using single tube9) If you use electrical appliances to aid heating and to switch off the power supple before bathing10) Please test the water temperature before using, in order to avoid scaldingQuick DetailsType: Evacuated TubePressure: UnpressurizedCirculation Type: Direct / Open Loop (Active)Heating System: Thermosyphon (Passive)Connection Type: Direct-PlugInstallation: FreestandingHousing Material: Stainless SteelCertification: CE, CCC,CQC,ISOCapacity: 200Place of Origin: Jiangsu, China (Mainland)Brand Name: sunpowerModel Number: SP-C seriesPower Source: SolarInner Tank Material: Stainless Steel  Packaging & DeliveryPackaging Details:seaworthy packageDelivery Detail:7 working daysTypeSP-C (Compact Non Pressure SWH)Outer Tank MaterialFood grade SUS304 2B stainless steel plateOuter Tank Diameter420mm,   470mm,   500mmInner Tank MaterialFood grade SUS304 2B stainless steel plateInner Tank Diameter310mm,   360mm,   380mmVacuum Tube MaterialHigh quality borosilicate glassVacuum Tube Size(mm)47/1500, 58/1800, 70/1700 (diameter/length)Tube Number8/10/12/13/15/16/18/20/22/24/30Frames (Stand Parts)stainless steel plate or aluminum alloyInsulation LayerHigh quality polyurethane foam made by advanced highpressure foam machinInsulation Thickness55mm(outer tank 420 or  470mm ),   60mm (outer tank  500mm )Hail Resistance25mmOperation Pressure75Kpa(max. )Standard QualifiedCE, CCC, Solar Keymark EN12976, SABS/* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1