You can always purchase an electric metre of of eBay and have it installed inline with the 14-50. What I do is get smartmetre reports (they are free). I don't know if you have this option in Nebraska, but if you do, it may provide all the information you want. The graph looks stepped during charging time because there is a Tesla and a Leaf charging. (The Tesla starts charging at 02:30 and ends around 04:30. It's recovering 50-60 miles on a typical day.)
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