While we can all build a solar collector, their use for large quantities of electricity generation has been problematic at best. But, like all good scientists and engineers, these guys keep plugging at it. The next generation will be converting solar energy to heat and then to electricity.
They are addressing issues of dirt, dust, and etching. The issues of heat-stress on metals is being worked out too. Doesn’t it make you wish it were your shop? The only thing they are doing wrong is outsourcing to other countries. Enjoy this 11 minute video!