Of course, this is from Tesla, and they famously puff up everything.. but I would expect even if not as good as claimed here, for the downhill part to certainly help a lot still.
What may not help is if they fully charge at work and have no battery capacity to soak up the regen on the way home. Regen ability gets limited the closer you get to 100%.
Neither are Teslas, but our cars range from getting 10%-33% back when going back down a mountain (curves, no traffic, avoiding using the brake pads or switching between charge/discharge on the throttle).
The results they report are incomparable for two reasons:
- straight line steep mountain roads don’t exist. On curvy roads (like mine) they’d need to repeatedly round trip energy to and from the battery, and that’s going to eat about 5% each time.
- the article claims going up and down the mountain uses as much energy as driving one mile. During the ascend/descend they drive 500 miles. The wind resistance for one mile flat and one mile on the mountain should be comparable, so their 95% efficiency number must be subtracting that (and rolling resistance) out.
