... 100% in houseAnnual capacity 1000,000setssolar hot waterSolar water heater,solar hot water,solar water heating,solar heatingModel: SL-CLSFeature:1) Collectors ... operate with traditional heating energy equipment,such as electric,gas,boiler,and so on,during raining.snowing,or cloudy ... -35C.Detail Specifications:1). Inter-tank: Super SUS304 stainless steel & thickness:1.2~2.0mm;2). Outer-tank: Color ...