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One thing I’d argue with here is the statement “solar panels must be replaced every 20-25 years, but coal plants last 50 years.” A solar panel will typically be converting at only 80% of its initial efficiency in 20 years (this is how the rated life is set), but it doesn’t magically stop producing energy precisely two decades after its manufacture. Inverters will need fans and electrolytic capacitors replaced, but at least one doesn’t have to go up on the roof to do that. In the meanwhile, the coal plant needs a small army of maintenance personnel and a steady stream of spare parts, to say nothing of mining and transporting the coal.

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