This map has some % grades on it in the lower right.I wish that the graphic of the Semi trip from SF to SD showed the topography in something other that dark grey (!), but it is quite remarkable that the grapevine climb and descent, and well as the other ups and downs along the route, had very little effect on overall Wh/mile compared to flat terrain driving. Regen shines here.
I set the slope of the added line to match the the interval between ~ miles 200 -- 250 of the trip where the terrain is flat.
See it here: Elevation from Fremont (California) to San Diego via Grapevine
Google map with waypoints: