Space-based solar power may be one step closer to reality, thanks to this key test (video) 

 A first-of-its-kind lab demonstration shows how solar power transmission from space could work.  

https://cdn.mos.cms.futurecdn.net/ezXE7xqF44Ed7eNKFkkzsM.jpg

https://www.space.com/space-based-solar-power-technology-demonstration