The 58/1800 solar water heater vacuum tube (ø5.8xL180 cm) is a standard, high-efficiency component used in evacuated tube solar collectors. It acts as the core absorber, converting solar radiation into heat for domestic or commercial water heating, even in cold or cloudy conditions. Technical Specifications Model/Dimensions: 58/1800 (58mm outer diameter, 1800mm length). Structure: All-glass double-tube co-axial structure. Material: High-borosilicate 3.3 glass, designed for high strength and thermal shock resistance. Coating: "Three-target" selective coating (Cu/SS-ALN/ALN), designed to maximize absorption (>94%) and minimize emission (<6%).

Solar water heater vacuum tube 58/1800, ø5.8xL180 cm