The other day I talked with Brendan Jones, Nissan VP of Sales, and he told me that charging to 100% EVERY day (topping off) will not degrade the battery pack. Also, he told me that using DC fast chargers less than 7 times a day will NOT degrade the pack. He said that these particular batteries have been extensively tested with a simulator that equals 8 years of use. So based on his testimony, I'm going back to 100% every day. The only downside I can see from 100% every day is no regen for awhile. When does regen begin...95% SOC, 90%, 85%?