Þ Highly efficient absorber, with daily average efficiency over 50%

Þ  Quick start up, with the heat pipes transferring heat energy into the storage tank in one direction

Þ  Able to withstand pressure of 0.4 MPa (4 atmospheres), so can be connected directly with city water mains

Þ  The storage tank and the heat pipe are metallically sealed

Þ  No water is inside the evacuated tubes; the solar water heater can still function with several broken tubes

Þ  Can be used all year round in cold climates: no water in the tubes to freeze

Þ  Highly efficient insulation with polyurethane foam keeps tank heat loss to a minimum

Þ  stainless steel storage tank inner cylinder stands 100,000 fatigue tests without any distortion

Þ  Long service life, can be used at least 15 years

Þ  Simple modular structure of diffuse flat plate reflector makes for easy assembly and installation

Þ  Large-scale solar hot water systems can be installed either with parallel or series connections of these units

Þ  Electric heater and controller make a complete hot water system