https://en.m.wikipedia.org/wiki/Cost_of_electricity_by_sourc... Depends. With just the cost per kWh is photovoltaic cheaper, but you would need additional storage for the nighttime, so it would become more expensive than nuclear. Also this didn’t account for winter time (in Germany photovoltaic make 5-10% compared to summer) and storing a half year worth of energy is going to be funny.(this will cost way way more than nuclear) A nuclear power plant could run 24/7 the whole year.