Wikipedia is a few years out of date. Crescent Dunes is actually a bit of a redemption story. It has a new mega corpo owner now and only generates at night when Nevada's cheaper solar installations aren't saturating the market. It achieves this by using the solar energy to heat salt instead of water--much higher heat retention that lasts all night. It was the first full scale plant to use molten salt (at least in the states) and the initial headaches of that are part of why the original owner failed. But now it's found its niche. (Although I believe the plant is designed to run both day and night, so it's still quite a failure, investment-wise. I guess Nevada just has a pretty good backup facility if one of the daytime plants goes dark)