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For off grid installations where the solar power is feeding a battery bank, increasing the performance of the solar panels on a marginal sun day can be a quite important benefit, since marginal sun days often come one after the other, and too many in a row can deplete the battery bank.
For on grid installations, given that wind power and possibly run-of-river hydro is likely offsetting your drop in daily solar peak supply, better to just have an UHVD line to a grid that has an independent complement of sustainable, renewable resources so that you can buy some from them when you are short ... because then you can sell to them when you have a surplus.
Which makes the simplicity of a fixed installation oriented to the average best performance for the needs of the grid quite appealing.
I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.
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