With the exception of California electricity in the southwest is comparatively cheap. Much of the energy is produced by nat. gas or nuclear and land is plentiful for transmission and distribution lines. In West Texas I pay a summer rate of $0.08745 per KWh. Solar would have to be much cheaper before it made economic sense regardless of how much sunlight can be harvested.
California rate is about 18 cents in most places by design. Gray Davis who was governor was thrown out of office after making deals to raise rates (among other things). The last 2 govs we had want the higher rates as the taxes are % percentages of the bill so the state makes more money - yet loses more as companies leave or cannot expand as the taxes are too high. Democrats really do not get capitalism.