The scientists tested special solar cells called DSC in windows to see how well they work. They looked at how good the cells were at letting in light, stopping heat, and making electricity. The solar windows had similar insulation to regular glass. They cut down on how much hot sunshine got through by around 9% to 47%. But they let less light in compared to normal windows. When combining the solar cells with different types of glass, some of the electricity-making ability went down by about 10% to 13%.