I've been charging my Tess for over 3 months using 14-50, 110v, Superchargers, and most recently, 14-30. I have consistently gotten a rated charge of 240-241 rated miles, fully charged. Always. Then, this morning, I check and it shows 244, and is fully charged. Why the change? I used the 14-30 plug, and it charged from about 40 rated miles, overnight.