Route
To ChargeIt: I took the longer way along the Western shores of lake Lucerne on the way home, so the overall trip length was the 337km. The energy consumption from Zurich to Wassen, mostly Motorway, but going uphill for some time was 173 Wh/km. At the top of the Sustenpass that cumulative average had risen to 213 Wh/km and fell again then to Handeck to 186 Wh/km. Considering that Handegg is at 1400 msl, so nearly 1000m higher up than Zurich, that is doing quite well. As I was certain then to be able to make it home comfortably, I had stopped recording more individual averages after Handeck.
Altitudes passed (meters above sea level msl):
Zurich: 430 (start and end)
Wassen: 916
Sustenpass: 2224
Innertkirchen: 625
Grimsel: 2164
Gletsch: 1757
Furkapass: 2429
Andermatt: 1436
I also learnt that on this type of trip, estimated ranges become (logically enough) hard to interpret. On the way back, after Wassen, the estimated range showed for a while over 500km range.