Thanks, I've forgot to add the specific of the smart glass.
This material uses:
Power - 110v
Frequency - 50-60 Hz
Electrical current - 0.1 amperes per square metre
Power consumption - 7 watts per square metre
each piece is made out of 9x50cm, so well below the square metre.
And here is the link to the manufacturer and specifically to the product:
http://www.prodisplay.com/switchable-smart-film.html
And here is the uploaded pdf with all the technical specs of the product:
https://plus.google.com/u/0/113031776563317981191/posts?hl=en
(double clic on the image so see the larger version)
Thanks for your help!