LeftieBiker wrote:The problem is that this pack seems to need ambient temps usually found in Scotland, not the continental US.
Based on what?
Seriously, why the pessimism? I don't see the evidence. If I missed it, point me to it.
There hasn't been enough time, realistically, to get a good measurement of how fast the cars will degrade. I'm not convinced by minor variation of the BMS's estimates, we have seen how bad the BMS estimate was for the 30kWh batteries, and I've seen huge variation in my 2014. The test of time requires time.
Other than pointing out the initial cost of the AC unit, I mostly agreed with your cost estimate. Didn't you notice?
What I don't see is how much your method reduces battery temperatures in your climate. Do you have measurements you care to share? The largest gain would come from someone in a hotter climate, where a larger reduction in battery temperature is reasonable at a higher energy cost than you would have. In your climate you should be looking at battery life of around 12 years or more, as you are generally cooler than the US average, and it is a fair bet that Nissan set the warranty threshold so that most people didn't qualify. Syracuse, NY and Seattle, WA have similar battery aging profiles. Both have an aging factor of 0.69 from Stoaty's model.