I really love cube shaped tiny houses as long as they have some kind of pitched roof. I realize that technically the addition of a pitched roof means they are not really cube shaped but for me pitched roofs are a requirement.
So when I saw this solar cube I was really impressed. I suspect the roof of the cube itself is weather-proofed but the second pitched roof is doing most of the work, both shading the house from the sun and keeping most of the rain off the house.
Solar-Powered Green Microhouse