How much power does the solar panels on the homes provide or what % of its power is supplied by those solar panels? Is there a varying level of solar panels on each home or is it either YAY or NAY?
yeah it makes power for them -- almost 100% for D1, 30% for D2 and 10% for D3
I'm assuming that D is short for density...
The solar panels provide power during the day, and rely on the city power grid during the night.
See Maxis Guillaume´s Twitter for more info: https://twitter.com/MaxisGuillaume/status/292408871199313922
There doesn't seem to be any specific information regarding how much power the solar panels provide for each home during the day cycle.
For information regarding SimCity 5 (2013) power sources, see this link. http://simcity.wikia.com/wiki/List_of_Power_Plants (buttom of the page)
There is great information regarding the different options.