The pilot project was deployed on the south facing windows of the Willis Tower’s 56th floor, and it uses a building integrated photovoltaic solution that has the capacity to expand to a surface area allowing over 2MW of solar power generation.

The mass-scale solar power window installations will enhance the energy efficiency and energy generation potential of a building’s exterior envelope and windows.

Pythagoras Solar co-founder and CEO Gonen Fink said that the company’s technology is set to provide Willis Tower with a valuable tool that will help move it toward its energy efficiency goals.

Pythagoras Solar is a provider of unprecedented transparent, energy efficient windows that also generate solar power.