For example, assuming same temperature, driving speed (55 mph), road smoothness, driving profile, except changes in elevation

Range of 30 mile level ground, how many kWh used?

Range of 30 mile but a gain in elevation of 3,000 feet, how many kWh used?

Range of 30 mile but a drop in elevation of 3,000 feet, how many kWh used?

Or some similar data along those lines.

Assuming that the Chevy Volt is 3543 lbs and the driver is 150 lbs, the elevation change of 3,000 feet should equal to 4.17 kWh in terms of potential energy difference (mass * gravity * elevation).

I know that climbing up 3,000 ft, you will get penalized the full 4.17 kWh in addition to the typical consumption of 30 miles drive on level ground (about 7.98 kWh for the 30 mile run based on a typical 53 mile/full charge range) for a total of 12.15 kWh.

Going down wouldn't be the same though. Assuming you put it to cruise control at 55 mph using the L-mode. You still get that 7.98 kWh for the 30 mile run minus a fraction of the 4.17 kWh from regeneration of the downhill ride, perhaps we get 50% recapture efficiency, so that at the end of the downhill run, we only have used 5.90 kWh.

Would be interested to know if someone here have real data measured or read from the DIC as compared to theoretical assumed calculations. Thanks!