"Our Havana project reduced energy bills by 60% annually while maintaining full ocean views. This article explores how architects and engineers are redefining urban landscapes with building-integrated photovoltaics (BIPV) tailored for Cuba"s climate and economic realities. Curtain walls offer many benefits, including aesthetic appeal, energy efficiency, natural light, and structural benefits. In contrast, VPV curtain walls. Compared with ordinary curtain walls, PV curtain walls can not only provide clean electricity, but also have the functions of flame retardant, heat insulation, noise reduction and light pollution reduction, making it the better wall material for glass commercial buildings.