Are You a Spectator of Space Solar Power?

I'd be interested to hear how that three % in operation cost compares to operation costs for the upkeep, like a coal powered power plant or something. Presumably it's much lower, but boy, i need to learn more about power. But of course, then you got to get into space to repair these things. So i think where wer lookng out here is a sort of race between, like bringing down the cost of the launches to get up there and improving solar panels on earth. I'm also sceptical, but i've been sceptical before. There's no limit to human ingenuity.