You've said before that you run at a "0% SoC" during those hot months, which I assume means your display says 0.0 kWh and the car doesn't allow any EV mode change. Your results are surprising for two reasons:
1. SoC of the entire 7.6 kWh battery (including hybrid portion and safety buffer), on average, is running in the teens*, which seems too low for best practices.
2. If you plug in at a 0% SoC and set value charging to some later time, Ford's logic will nevertheless charge immediately to 10% and then stop (resuming later as per the value charge setting). Ford must think it's not good to run at a 0.0 kWh reading.
Your results seem to prove them wrong, or at least the battery in those conditions is more resilient than common knowledge would think. It's hard to imagine you doing any better using any other practices.
it seems that you've shown (though it's only one sample) that for the Energi,
- low SoC is not a concern, at least not in high heat (no data for cold temps).
- strict adherence to low SoC in high heat has been shown to result in very low battery degradation.
Congrats, and thanks for posting this information. Very enlightening.
* With a full hybrid portion, according to another post by you, that's 22% full of the complete battery; other figures come to as much as 26%. But the car wants to run at about 50% hybrid portion, which puts it at ~12-16% on average.
I've seen a couple of reports of fleet vehicles bought used with a couple of years and near 100,000 miles on them that apparently have never got charged and the new owners are reporting like-new batteries on them. Based on other posts talking about high heat and high SoC together and considering my electric rate jumps from $0.06/kwh to $0.12/kwh in the summer I decided to just defer charging altogether in the summer months. So far this strategy seems to be working. And yes, I literally run at 0% SoC (yes, my ScanGauge stays close to 15% in hybrid mode) for months at a time with null ill effects so far.