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SolTech ST can be used both as a product integrated into a building (BIPV) and has a function in addition to producing solar electricity, and therefore also is a building material or as a product that is applied to the outside of an envelope (BAPV).
Below are more facts about solar energy and what the various technical terms mean, how much of our solar photovoltaics supplies in unshaded position, in different directions, as well as technical descriptions and regulatory texts.

What is U-value?

A measure of how much heat escapes through the glass.

The lower the U-value, the better the insulation. The U-value can be improved in that the glass is coated with a metal-based surface which reflects long-wave radiation back into the room. U-value of 1.0 means a heat flux of 1 watt / square meter area for every degree that is different between the outdoor temperature and the indoor temperature.

What is G value?

A measure of how much of the sun’s heat (infrared radiation) coming in through the glass.

A low G-value indicates that a window transmits a low percentage of solar heat. G value can be improved by the outer glass is coated with an IR-reflecting surface that reflects a part of the heat radiation. In homes with large glass surfaces, especially in the south and west, it can be an advantage with low solar transmittances.

What is Lt-value?

A measure of the amount of daylight entering through the glass.

Windows with low U and G values will usually also lower LT values which affects daylight in negative. BBR Section 6’s demands on natural light for rooms where people are present more than temporarily. As general advice indicated a window glass area corresponding to at least 10% of the floor area when the windows are 2 or 3 clear glass with an LT value of about 70%.



The values are simulated for a facility of 10,000 W of the product SolTech Supreme and the location is Stockholm.

SolTech Fasad (BIPV) 1200x600 mm

SolTech ShingEl

SolTech ST (BIPV) 1200x4800mm

SolTech ST (BIPV) 1200x4200mm

SolTech ST (BIPV) 1200x3600mm

SolTech ST (BIPV) 600x4800mm

SolTech ST (BIPV) 600x4200mm

SolTech ST (BIPV) 600x3600mm

SolTech Supreme (BAPV) 1200x600mm

SolTech ST (BIPV) 1200x3000mm

SolTech ST (BIPV) 1200x2400mm

SolTech ST (BIPV) 1200x1800mm

SolTech ST (BIPV) 1200x1200mm

SolTech ST (BIPV) 1200x600mm

SolTech ST (BIPV) 600x3000mm

SolTech ST (BIPV) 600x2400mm

SolTech ST (BIPV) 600x1800mm

SolTech ST (BIPV) 600x1200mm

SolTech ST (BIPV) 600x600mm

SolTech ST (BAPV) 1200x600mm

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