My last 50 175km logged with my Volt 2013, commute heavy traffic every working day, long distance travelling (450km one day trip) on regular basis.
77% were e-km (EV) x 50 175 km => 38 635 e-km
7 857 kWh were used (including 1 025 kWh charger losses or 13.5%),
7 857kWH / 38 635 km => 20.34 kWh/100km average, losses included.
Note 1: the 15kWh from screen capture is somewhat wrong because blended average = 7 857 kWh / 50 175 km
Note 2: the 1.4L / 100 km same blended average 716L / 50 175 km => 1.43L/100 km
Long distance using range extender and ERDT (below -10C) during winter:
50 175 km - 38 635 e-km = 11 540 km c/w 716L of gas => 6.21 L / 100 km average on range extender
May 21, second screen capture. How electric is efficient in heavy traffic condition
For clarification purpose, between step 1 and 2, my Volt was recharged.
Total Energy use the day 16.14 kWh total
Step 1 Start SOC 99.2%, End SOC 38%, 34.12km (highway), duration 00:49:08, usage 6.52kWh
Recharge
Step 2 Start SOC 100%, End SOC 64.3%, 21.41km, duration 01:06:32, usage 3.83kWh
Step 3 Start SOC 62.4%, End SOC 4.7%, 43.86km, duration 00:52:49, usage 5.79kWh
So, total "traveling " time is 2:49:06 :snif: but distance was only 99.39km driven, speed average 36.34 km/h in start/stop traffic most time (step 2 and 3)
In short: 5.90 kWh / hour but 16.23 kWh / 100km
Conclusion: imho EV is quite efficient, in heavy traffic condition...
Data logged source by FleetCarma, Charge the North program