So, I'm trying to get a handle on what I can expect my "real world" range will look like on Model S over time with the 85 kWh pack. I have no real EV experience, so I'm trying to piece together a picure with the facts I can find. Here's what I'm working with:
- Tesla says 300 miles, albeit at 55 MPH in perfect conditions with a new battery and no HVAC.
- EPA sys 265 miles.
- Recent Motor Trend range test shows about 238 miles and that seems like it was done in ideal weather and "nursing" it a bit. Their sense is that range is better in stop-and-go than on the freeway.
- A recent Cars.com long term report on the Chevy Volt shows electric range drops from 40 miles to 25 miles in "cold" weather. That's a 38% reduction! Not the same car for sure, but it does have a similar technology liquid cooled/heated Li-ion battery. We have a company Volt, but no cold weather experience with it yet.
- Tesla says they expect the battery to retain 70% of its capacity after 7 years. This turns an 85 kWh battery into an approximately 60 kWh battery by that time.
- I live in Canada. It gets cold. In addition to cold, it gets snowy, which increases rolling resistance and reduces range further.
- My driving is about 85% freeway with the balance urban use.
At the 7 year point, I would start out with 238 * 0.7 = 167 miles of "ideal weather" range. (Perhaps a bit lower because of my freeway per-centage). In the "cold", I would lop of another 38% which takes me to 104 miles, and I haven't factored in snowy roads yet.
My total commute is 80 miles with no side trips, which I am required to make for my job from time to time. My cottage trip is 125 miles one-way, but I can charge when I get there.
Something I don't fully have a grasp on is what is meant by "Range" vs. "Normal" charging. I gather "Range" charging gives you the full, advertised range, but is not meant for everyday driving as it can degrade the battery performance. How much of a range "hit" does one take with "Normal" mode charging?
Am I crazy here? Have I missed something? It looks like what starts out as a 300 mile car may barely make an 80 mile commute in the winter months after a few years, and that would be with a "Range" charge.