... SUS 304 3)Nice Product DescriptionFeatures: 1) Hybrid advantages of solar water heater and heat pump water heater. In sunny days ... , the water is heated by solar energy, while in cloudy or rainy days, the water is ... defrosting system, totally solving making heat problems in winter About solar water heater: 1) Vacuum tube size: Φ58x1,800mm 2) Bracket ...