In an attempt to enhance the solar modulation in electrochromic windows, the electrochemical deposition of polyaniline (PANI) and Prussian Blue (PB) has been studied more closely. Several layers of PANI and PB at different thicknesses have been electrodeposited on top of each other, or intermixed in the coating matrices. This intermixing, or multilayer deposition, of PANI and PB may lead to an overall improved coating performance. Integrating over the whole solar spectrum, a modulation as high as 49% of the total solar energy has been achieved in solid state electrochromic windows based on tungsten oxide (WO3) and multilayer PANI-PB coatings, which is comparable to earlier results with a single PANI/PB layer.