Made the return trip last night.
We made the ~830 mile drive with only 4 stops. I used the built in navigation guidance with built in charging station selection this time (although did check with ABRP).
I did have one segment of the trip that got more exciting than intended, where I thought we’d be rolling up to the charger with like 1%, but it turned out better than anticipated, with 11% left.
We had charged in Boise ID up to 92% (eating and getting snacks/medication at the Walmart). We were cruising at about 80mph for 2.5hrs, and it was telling us to charge in La Grand OR. But when we got to La Grand, we still had 32% charge, had already done 170 miles on the first 60% charge, and thought our next stop was in Pendleton OR, which is only another 40-50 miles past La Grand. So we skipped the stop, and pressed on.
Then we found out that the next charging stop that was available was actually in hermiston OR, instead of Pendleton. And that was a total of 75 miles or so past our first stop. And our minimum range on the guess-o-meter was a few miles less than the distance to the charging station in Hermiston.
I slowed down, and drafted more, as we headed up the long slow incline out of La Grand, and that climb of a few thousand feet kept me sweating about if we’d have enough charge to make it to the charger. But the route planning navigation still said we’d be ok, and my mental math and knowledge of the upcoming terrain had me pretty sure we’d be ok.
After the long gentle climb there, you come down “deadman’s pass” into Pendleton. It’s 6 miles of 6% grade. That downhill gave us a pretty constant 15-45kw of regen power, and almost 3% charge back. And once you’re down, there is still a fairly downhill elevation profile for miles.
We rolled into the charging station in Hermiston with 11%. I was wishing for a bit more emotional support battery, but it was fine. And this is now the longest distance I’ve done on a charge at speed on the highway (the time included 15-20min of waiting with the ac on while the wife and kids got stuff in Walmart), and is the lowest SOC I’ve ever gotten the vehicle to.
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The other observation this time was how much better the efficiency was. My avg efficiency for the trip, was about 2.7 miles/kwh. And my avg speed was pretty high, in the 75mph range. But the overall elevation profile of this trip was from ~4500ft in UT, down to -~500ft where I live in WA. Plus, it was decent weather, and not tons of wind (but not no wind). Also the drive was earlier in the day with more traffic, so I could draft a bit more

.