Re:Tesla's team to suppress driving range complaints (2023)
by hedora on Sunday March 09, 2025 @11:18PM
(#43316694)
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.
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.