Concentrated solar uses the energy-rich infrared band of solar radiation and it has great promise, but it depends on simple and cheap tech being developed to capture and convert that heat to electricity.
South African team may have solved solar puzzle even Google couldn't crack
“We are developing plonkable heliostats. Plonkable means that from factory to installation you can just drop them down on to the ground and they work.” So no costly cement, no highly-trained workforce, no wires, just two workers to lay out the steel frames on the ground and a streetlight-style central tower.
