We're passively heated with windows very like the ones in your picture (less fancy in our case, but similar amounts of glass). The low-e coating is quite fabulous at keeping in the heat that the sun provides in winter, and in summer our overhang keeps the sun out completely. The overhang is 22" in our case but the wall is only a slightly tall single story high. We designed our place for passive heat specifically - also concrete floor and earth sheltered for thermal mass. But your place, from the little we know, may also have been designed for some of this, especially with that wide overhang you mentioned. Check for the low-e coating, and see if you get the sun shining in in the summer.
I have nothing on my windows, for what it's worth. Gain far more than we lose, and the closer we get to winter solstice, the more passive heat. As we pass the solstice, the sun heats a little less of the floor every day, but for longer each day. All this works great until we get snowstorms. :)