... 1.CE,ISO9001,CCCcertificate 2.Offer OEM 3.Delivery time:20 days 4MOQ:1 set solar hot heater waterEvacuated Tube Specifications1.Inner ... .Electrical heater,Magnesium rod,Controller Available against requestEvacuated tube solar hot water advantages:1. Can he operated completely automatic if connect ... and it ie not harmful to health. Direct-plug solar hot heater water without pressure