How Mirrors Could Solve our Energy Problem

The modern solution to storing solar power is PV + battery.

CSP got some good buzz about 10-15 years ago when batteries cost 10x as much as they do today. But construction peaked about in 2012 and has declined since. Since PV + battery is today about comparable in price to CSP, and it's in mass deployment whereas CSP is not, that cost difference is going to grow in PV's favour.

One disadvantage of CSP is that you need a site with a lot of clear skies, since you can't concentrate the diffuse light coming through clouds. But you can capture diffuse light in a PV cell. So there's more places you can build PV+battery than CSP.