E-Golf (35kWh) consumption too high at lower speeds

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The reference consumption may be fine, but at lower speed this thing is more efficient than the planner is currently assuming.

If I set 160Wh/km @ 110kmh the assumed consumption is only around 5wh/km lower when driving on roads with speeds around 50-80kmh.
I've done trips in temps around 0-5C and only used 140-145Wh/km. Maybe heat-pump is not considered in the profile? Or is planner only looking at speed limits and assuming you can drive at that speed constantly? That is not going to work many places with a default 80kmh limit, but winding roads where the practical limit is more like 60-65kmh on average.