30 workers isn't a lot for a power plant. According to this article[0] (ignore the coal stuff) a decent gas turbine plant takes ~25 workers to keep it running, and that's for a system whose energy source can just be piped in rather than having to be constantly babysat so it doesn't irradiate the tri-county area. That's kinda the flaw of a steam turbine based system; it doesn't matter if the heat comes from coal, uranium, concentrated solar, whatever, you still need people around to make sure the system with superheated steam and a big heavy turbine spinning really, really fast doesn't go wrong.

[0]https://www.powermag.com/supporting-coal-power-plant-workers...

Do you get out of your car to wipe your windscreen when its raining? This cleaning problem seems like something that would be super easy to automate, I dunno why they would higher 30 people to do this when you could higher one engineer.

Just add a bit of water™

How come that number of rovers on Mars dies due to dust on its panels? If it's a simple problem to solve why would NASA let them die?

Water shortage is also present on that power plant.

There are many PV cleaning robots already on the market. Google for them.