Passive Solar Design- are we on the right track?

We are aiming for passive solar on your upcoming build and we think that we are on the right track, but could someone have a look and let me know what you think? We are still new to all of this and we just want to get it right so any feedback and/or tips would be greatly appreciated. Thanks in advance for your assistance.

In this image North is at the top. The doors are all glass French doors and the windows are two metre high windows that start at the floor and are a metre wide. The house is being build in Whangarei New Zealand. We will have overhangs on the windows similar to this image to keep out some of the summer sun but we haven't quite figured out the exact length the over hang needs to be.

*in case those images aren't showing up here are the links:
https://www.facebook.com/photo.php?fbid=10205469177358682&set=a.1381800434886.53547.1528210322&type=1&theater
http://www.domeshells.com.au/plans/2x6.0m_2br_s1.pdf

Shar, welcome to Permies! You certainly seem to be on the right track with getting passive solar performance out of your plans. The overhangs dont look big enough and the southwest windows will be more at risk of overheating. My biggest concern though would be the longevity of the window flashing, a notorious detail for domed structures.

Allow me to be the one to ask.. why domes?

Thinking more about the overhangs, they will probably be a challenge because they are typically spaced above the window. Place them right on top and a good portion of the window will never see the light.

Based on the climate in Whangarei, it seems to me like you would want whatever solar gain you could get, even in the summer. The shading recommendations that work in the Northern usa are likely to be wrong for Northern New Zealand. In that type of climate, I would think that you'd get a better return on investment with insulation than by trying to capture solar.

On a dome, I'd use non-window collectors on the roof so that heat could be admitted to the house whenever it's desired. That would allow them to face the sun directly, rather than taking whatever happens to find a window.

Try some of these tools: http://www.builditsolar.com/References/SunChartRS.htm