> And no effective way to store it for use at night and the evenings.
I guess you haven't heard of solar thermal with storage. You concentrate sunlight with curved troughs or steerable mirrors. This is used to heat a storage material such as thermal oil or rocks. In the off-hours you use the heat to boil water, and the steam runs through a tubine-generator set like in conventional fossil plants. There haven't been a lot of thermal storage units built yet *because we don't need them yet*. For example, the 400 MW Ivanpah solar thermal plant is on the same power line as Hoover Dam. The dam serves as storage by not using water when Ivanpah is running, and saving it for night-time. Eventually you run out of existing storage capacity, and need to add more, but we are not there yet in most places.