You may find it convenient to get part of your power from solar panels, but it does entail a big capital investment. The batteries or grid-connected power for night time power would be another big capital investment. Currently many of the power companies are using gas-fired generators to minimize that investment (and to enable them to ramp up quickly when solar or wind power suddenly drops). You suggest backing up the solar with nuclear, and that can work. However, the current generation of nuclear power requires an even bigger investment in capital. Few owners want to let any significant amount of its capacity go unused. I think the ideal approach is to (1) invest today in enough research that the next generation of nuclear power (e.g., LFTR) will be much less expensive, (2) also invest in battery technology for grid-connected storage, (3) put a price on carbon dioxide emissions, (4) let the price of electricity float during the day, and (5) let the market decide what combination of solar panels, extra nuclear capacity, and grid-connected storage makes the most sense.
The real fantasy is that the 600M people in India without electricity could rely on solar power. They do not have the land or the money to invest that way.