Renewables are cheaper than nuclear mostly because of large state grants and tax reductions. Ultimately, if you want to handle all of your load with only renewables, you're going to need to build about 3x what's needed, just to account for wind turbines not running, sun not shining, etc, and you're going to need to replace most of it in 15 years, with rare earth materials that will start costing a lot of money. Needless to say, it's a waste, and the solution that most competent people agree on is to have a nuclear/renewables mix. Nuclear is necessary to provide a massive, stable base load. Renewables provide people some temporary independence and the overproduction could be sold. But, go for too many renewables, and suddenly you're back to burning gas at night to keep producing.