Tele2 Arena, Stockholm
General Contractor: FG Light Energy AB, Stockholm
Flexible and lightweight thin-film CIGS solar panels recently were installed over the two Tele2 logos on the modern multi-venue arena’s roof.
CIGS stands for copper-indium-gallium-selenium, a metal alloy that converts the energy of light directly into electricity by the photovoltaic effect. The CIGS absorber is deposited on a stainless-steel substrate, along with electrodes on the front to collect current. The cells are then connected in series and covered by a protective layer of plastic to form a flexible solar module.
The type of membrane roofs normally used on arenas cannot take the load of traditional silicon panels. Because a stainless-steel substrate is used, the CIGS solar modules can be made without glass. The CIGS solar modules are, therefore, lighter, flexible and can be made frameless, to suit applications where traditional silicon solar cells cannot be used. In addition, the solar cells used on the venue are free of cadmium, a toxic material usually used in CIGS and other thin-film solar cells.
Thin-film Solar Cell Manufacturer: Midsummer
Tele2 Arena, which opened in late 2013, is one of the world’s most modern venues with free Wi-Fi, 600 digital screens, Stadium Vision technology, a retractable roof and transparent façade. The venue is mostly used for concerts and football matches. The arena has a capacity of up to 33,000 spectators for football matches and 45,000 for concerts. Spectators in the front row are only 6 meters from the sidelines.