In your scenario for wind and solar to meet the energy needs of the US you need the sun to shine and the wind to blow....constantly. Bad weather, no wind or too much wind and wind power drops. Solar also prefers sunshine, so sunny southern climates are favored, the cold dark north in the dead of winter won't help the grid. And of course solar doesn't operate at night.
Battery storage technologies are largely a joke. Here is a recent project in California that costs a bundle of money and provides 110,000 homes back-up electricity for two (2) hours I'm not joking - back-up electricity for 2 (two) whole hours:
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EnerSmart Storage, a renewable energy company based in San Diego, will design, construct and operate the systems. When completed, 12 sites across the county will enhance grid reliability and increase energy efficiency. The entire portfolio will account for 165 megawatts and 336 megawatt-hours of battery storage electricity—enough to power 110,000 homes for two hours."
Cost for the system:
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Beach of EnerSmart estimated the price for the San Diego portfolio will come to about $300 per kilowatt-hour." Do the math for a project that says it will operate at "
165 megawatts and 336 megawatt-hours of battery storage".
A molten salt nuclear reactor operating 24/7, rain or shine, day and night, 365 days a year makes than wind, solar and back-up batteries.
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