ING DIRECT BANK
ING, the largest online bank in the world, pledged their commitment to Onyx Solar®’s technology with the integration of a photovoltaic glass skylight in the central garden of their headquarters in Las Rozas, Madrid.
The skylight, with a surface area of over 200 m2 (2,152 SqFt), is comprised of 78 amorphous silicon glass modules with a semi-transparency degree of 20% and dimensions of 2,560 x 1,176 mm (8.4 x 3.85 Ft).
FEASIBILITY STUDY OF AMORPHOUS SILICON SKYLIGHTS IN MADRID
Reduction in HVAC energy demands
Internal Rate of Return
- Total Area - 223 M2
- Electricity generated in 35 years - 364,578 kWh
- Total lighting points operating 4 hours per day in 35 years - 715 lighting points
- CO2 emmisions avoided in 35 years - 244 Tons of CO2
- Barrels of oil saved in 35 years - 215 barrels per m2
This skylight has a power capacity of 7 kWp and is capable of generating nearly 13,000 kWh of clean, free energy yearly, thus preventing the release of almost 9 tons of CO2 into the atmosphere while supplying over 700 lights throughout the building.
In addition to generating power, the glass modules employed filter up to 99% of ultraviolet radiation and 95% of infrared light. These modules also have an optimal Solar Factor which enables the entry of daylight while preventing the greenhouse effect, enhancing considerably the comfort of its occupants. The G value is between 20% and 40%, depending on the degree of semi-transparency.
"With the photovoltaic glass modules in the skylight, we managed to exploit all the energetic potential of this area, while providing our garden with a pleasant atmosphere”. “In this way, this area represents a further example of our commitment to the environment; we achieve considerable energy savings, we use resources responsibly, we promote sustainable architecture and we gain a different, innovative workplace”.
Juan Carlos Castillo, Director de Servicios Generales y Seguridad de ING Bank.