Aug 31, 2014 - 06:44 AM
I have 2012 iMiEV with 20k miles since March 2012, located in central New Jersey.
When I got the vehicle, there was no method of measuring battery capacity so I could only measure the distance travelled, which is inacurate but about the best at that time. One of my friends happens to live at the same altitude on Long Island, NY and the typical distance over 100 miles. When routing for shorter distance, it can be as short as 88 miles. I typically choose 93 mile route and try to maintain the same driving style and run in August when the temperature is favorable. I have not been stranded in this project, yet. Total vehicle range is miles driven + range remaining. The numbers below are NJ-->NY, then NY-->NJ.
2012: 92.5, 94.4, 97.6, 92.2 miles range
2013: 95.5, 91.7 miles range
2014: 95.9, 98.0 miles range
Based on this data I can hardly notice any battery degradation.