Electrochromic glass and embodied carbon

Hello, All!  We haven't run WBLCA on a project that may include electrochromic glazing before, and it's embodied carbon footprint is really high in comparison to a more traditional double or triple pane IGU (we thought it would be higher, but this is 3-4x higher).  The EPD we have from Sage Glass for their triple pane electrochromic lists a GWP of 585 kg CO2e/m2.  Tally includes an electrochromic product as well, and it blows the traditional IGUs out of the water.  I realize we need to keep it in the context of glazing's contribution to overall building embodied carbon, but this was a big enough difference to give us pause.  Have others seen this as well?