Hello,

Can someone tell me what is the font used for "Electrovolet"?

Thank you

Bauhaus  Suggested by donshottype 

If this is the original logo from 1928 it would have been a custom design, perhaps inspired in part by the geometric Bauhaus alphabet prototype created in 1925 by Herbert Bayer, a professor at the Bauhaus school in Dessau, Germany.
Compare the _E_, _e_, _o_ and to ITC Bauhaus, which is similar but NOT THE FONT.

The squared _t_ in the image might have been inspired in part by idea of using squared sections instead of curves that was used for some letters, but not _t_, in Paul Renner's original Futura
http://www.myfonts.com/fonts/wiescherdesign/futura-classic/

Larger scale image of the logo at http://www.electrovolet.be/