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Because there are only two trip meters and I use A to get distances between various pairs of locations, I use B for lifetime Wh/km figures, but I reset it once a month to watch what happens each month. Three months make a season, whose Wh/km I can calculate quite easily. I can also calculate lifetime average similarly. So you don't need to keep one meter untouched to get that. Just keep track of all the figures from that one meter.
As for charging at 20A or 80A, I've read conflicting opinions on which is better for the battery. I'm not an engineer or scientist, so can't make any claim. It does seem, however, that charging at low amperage is inefficient, which is a different question.
Well I'm not so sure about that one. Charging with that much current on a regular basis has to have some impact on the chemical makeup of the battery. I've read articles that even say that you are better off dialling down the amperage when you charge at home if you are not pressed for time and that charging at 20A is better in the long run than at 50 for example. Perhaps the differences will only accumulate over long periods of time but why risk it if you don't have to? I read a really good article about all of this recently in the Charged Electric Vehicles Magazine.
The Model S battery is so big, that charging at 20A or 50A literally makes no difference to it. 50A is about 12kW. You have an 85 kWh battery. So charging at that rate is about a 0.13C charge rate. No lithium ion battery will be bothered at that low charge rate.
Supercharging at 120kW is charging at about 1.5C. Most lithium ion battery chemistries can handle even that with ease, Tesla's particular chemistry's limit for no degradation seems to be near that limit. But I would not at all be surprised if the no degradation limit was more like 2C. I would bet that the reason Tesla has so far limited Supercharging to 120kW has more to do with heat transfer issues, and physical connector issues more than battery chemistry limits.
Bottom line, there is zero evidence and zero reason to think that repeated charging at any level will harm the battery.
Supercharging at 120kW is charging at about 1.5C. Most lithium ion battery chemistries can handle even that with ease, Tesla's particular chemistry's limit for no degradation seems to be near that limit. But I would not at all be surprised if the no degradation limit was more like 2C.
If you are an expert on this, then that's great although I think you are going a bit far saying ZERO evidence and ZERO reason. to.
Here is the evening news version of the Toronto opening with a very shortened interview of our own Jgdixon:
http://globalnews.ca/news/1543332/tesla-motors-opens-first-supercharger-stations-in-ontario/
John, was that your 18650 battery in one clip?
And mknox is quoted in an article in the National Post / Financial Post / Ottawa Citizen about the Ontario superchargers and the gigafactory:
Tesla moves closer to mass-market electric car with Nevada gigafactory, Canadian supercharger stations | Financial Post
With confirmation by Tesla yesterday that groundbreaking is imminent, I thought it would make sense for the sole Quebec supercharger to have its own thread:
Supercharger - Drummondville, QC
If anyone drives by the site, please post some pictures!
Is this a randomly organized thing, i.e. it only happens if someone decides to add a thread?
Not a bad article, but I just hate that opening line "Tesla vehicles may still be niche toys for the wealthy..."
Here is the evening news version of the Toronto opening with a very shortened interview of our own Jgdixon:
http://globalnews.ca/news/1543332/tesla-motors-opens-first-supercharger-stations-in-ontario/
John, was that your 18650 battery in one clip?