Electrochromic (EC) thin films assembled with proprietary EC advanced materials can modulate light and heat transmission rendering properties such as visual comfort and energy savings. The material design and fabrication with solid electrolyte achieve chemically, and electrochemically stable high performance electrochromic devices produced in large scale by cost effective roll-to-roll technique. Thin film-based EC devices can be easily cut and encapsulated into a glass with any curvature and irregular shapes, which makes it possible to be applied into a wide variety of applications. The technology is also available in numerous colors.