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But it’s also environmentally better for you to take the resistive heating thing. As long as you never need to heat it up outside of the noon-window that’s strictly positive. Because the “additional” solar panels will be necessary anyways to cover the night/late evening usage. The optimal buildout will always have superfluous energy at noon. That’s fine. We just need to get over the whole “energy costs anything” thing. That’s only true if you need to spend fuel to generate it
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The magic of market pricing means people will figure out the best solution and optimise towards that.

Hot water heater tanks are easily one of the most obviously good applications of noon excess energy, and resistive heating elements might as well be free.

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