/sci/ - Science & Math

What exactly is wrong with making huge solar power plants? Couldn't you just build so many solar panels that a whole region has enough electricity even for when there is no sunlight? I'm thinking of places like Australia and Africa with lots of sunlight. Why is a concern to be expensive? As long as it produces more energy than it consumes and investments are paid off within some 50 years what's wrong with a country building solar? What about that guy who said whatever solar power is thrown into a grid will have a priority making the power clock go backwards when it passes through a household or something like that? And my final question is wouldn't solar be specially benefits to third world countries? If yes how can they be successfully implemented?