This is the neighbourhood where a colleague of mine lives. The houses had solar panels added during construction. The number of panels, given latitude and climate as well as probable efficiency of the panels, should be enough for about 40% of the energy consumption.
I think adding photo voltaic technology, as well as solar water heaters to building during construction is done way too little. It helps lower the threshold for people to ‘try’ it out.
Recent polling showed that more than half of the Dutch population thought generating part of your energy yourself through solar or wind was a step too far. Three quarters thought they were already mindful enough to not waste energy. I’d say there is a big difference between the effort to try and use less energy for the same tasks (always worth an effort I’d say), and the notion of using energy you generated yourself. The two are neither opposites, nor replacements of each other, but complements working in two different directions altogether.
Adding PV panels to your home later on is still rather expensive, but adding them on top of the general building budget changes perspective as well as lets you finance it through your mortgage. There the total sum is less interesting to most than the actual monthly mortgage rates. Also it makes the financing costs tax deductable.