@brettabailey,
Sounds like a very interesting and useful project. A few thoughts:
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if you really want to scrape/download each hour in native R, you can use RSelenium instead of a separate macro. Take a look at my CollectData.R script here for an example.
Scraping the web app Power Meter for data analysis - #3 by kevin1 -
it’s easy to figure our best case solar production from the NREL app, or from RSolarR, but real world production is another matter.
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What is your objective function you are trying to minimize, as a function of power sold to the grid and power bought from grid ?