Passive & Direct Solar Water Heating System ( Thermosiphon)

Product Overview

The Thermosiphon Direct Solar Water Heating System delivers reliable, energy-saving hot water using the sun’s natural heat. With no pumps, no electricity, and low maintenance, it is a cost-effective solution for homes, hotels, schools, hospitals, and commercial buildings in Kenya.

High-efficiency flat plate solar collectors absorb solar energy using selective-coated absorber plates and copper tubes, while tempered solar glass maximizes heat retention.

Heated water rises naturally into the insulated storage tank, while cooler water flows back into the collector. This thermosiphon circulation works automatically whenever the sun shines, ensuring continuous hot water supply without power.

The stainless steel tank, insulated with high-density PUF, keeps water hot for long hours, even overnight. Designed for flat and pitched roofs, the system is durable, weather-resistant, and suitable for Kenya’s climate.

Technical Specification
Model PSD 100 PSD 150 PSD 200 PSD 300
Tank Capacity (Litres) 100 L 150 L 200 L 300 L
Collector Type Flat Plate Collector Flat Plate Collector Flat Plate Collector Flat Plate Collector
Number of Collectors 1 1 2 2
Collector Area (Approx.) 2.0 m² 2.0 m² 4.0 m² 4.0 m²
System Type Passive, Direct (Thermosiphon) Passive, Direct (Thermosiphon) Passive, Direct (Thermosiphon) Passive, Direct (Thermosiphon)
Tank Material Stainless Steel (Inner Tank Grade SUS 304/316)** Same Same Same
External Casing Colorbond / Stainless Steel Same Same Same
Insulation Polyurethane Foam (PUF) PUF PUF PUF
Insulation Thickness 50 mm (Typical) 50 mm 55 mm 55 mm
Maximum Operating Pressure 0.45 bar 0.45 bar 0.45 bar 0.45 bar
Orientation Horizontal Horizontal Horizontal Horizontal
Mounting Compatibility Flat Roof / Pitched Roof Flat Roof / Pitched Roof Flat Roof / Pitched Roof Flat Roof / Pitched Roof
Heat Transfer Mechanism Natural Thermosiphon Circulation Same Same Same
Temperature Rating (Max.) 85°C 85°C 85°C 85°C
Collector Tubing Material Copper Tubes Same Same Same
Collector Absorber Plate High-Efficiency Selective Coated Plate Same Same Same
Glazing Material Tempered Solar Glass (Low Iron) Same Same Same
Frame Material (Collector) Aluminum Alloy Same Same Same
Tank Heat Preservation Duration 48–72 Hours (Depending on Use & Climate) Same Same Same
Recommended Household Size 1–2 Persons 2–3 Persons 3–4 Persons 5–7 Persons
System Weight (Empty) ~75 kg ~90 kg ~140 kg ~180 kg
System Weight (Full) ~175 kg ~240 kg ~340 kg ~480 kg
Tilt Angle Requirement 15°–45° 15°–45° 15°–45° 15°–45°
Warranty 5 Years (Tank & Collectors) Same Same Same

 

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