Any hot climate (Arizona, Texas, Nevada) roadsters users here? I would like to know what level of battery degradation are you seeing after a year or two driving this car? Over at My Nissan Leaf forum, a storm is brewing because early Leaf drivers are seeing 15% battery loss after only a year of ownership. Many people are attributing this to the hot climate (Southwest US desert areas), and the fact that Leaf does not actively cool/heat its battery. Tesla probably does not have this problem due to its thermal management system, but with the 100F+ Arizona weather, you never know. So has any roadster users lost more than 15% of battery/range after owning the car for less than 2 years.