You aren't comparing the price of nuclear vs. the price of solar but the price of nuclear vs. solar + hydrogen.
By your own numbers the price of solar is 3$ per watt while the price of nuclear is 7$ per watt.
Your solar power plant that's backuped with hydrogen produces the energy at different prices at different times. While a nuclear plant can produce the same amount of power at night than at day it's not possible to change the amount that gets produced as fast as you can change how much hydrogen you burn in fuel cells.
You aren't comparing the price of nuclear vs. the price of solar but the price of nuclear vs. solar + hydrogen.
Oh crap, you're right. I got this confused with another discussion. Sorry about that. Anyway, the latter is a more meaningful thing to compare.
By your own numbers the price of solar is 3$ per watt while the price of nuclear is 7$ per watt.
That's cost per peak watt; a more relevant number is cost per average watt (assuming perfect energy storage at no cost). To get that, you have to multiply by the capacity factor. For new nuke plants, that'...
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