What am I doing wrong? I specifically zoned a residential/commercial area around the plant (which btw has all the upgrades), for the workers, yet people move in and don't want to work at it, they all flock to my solar plant on the other side of the city.
Simcity is "famous" for it's green outlook. So your inhabitants will prefer green energy and workplaces. Thus going to the solar plant first.
Consider researching the improved solar panel. With that and a very small, also researched, windmill plant i can power my entire city _and_ the regional archeology. With power to spare.
My thinking is:
A. Get the NPP working
B. Demolish the solar plant and use that space for zoning RCI
C. Put a second power plant near the edge of my map to back up if the NPP goes down or spews radiation everywhere.