“…However, the new regulation includes a phase-in period, which allows OEMs to meet this target with only 95% of their car conventional technologies. There are several recent studies that focus on the optimal battery size for grid connected hybrid electric vehicle for the US market (Shiau et al, 2009, Peterson, Michalek, 2013, Shiau et al, 2010, Shiau, 2011, Wu et al, 2011, and for the European market (Özdemir and Hartmann, 2012, Ernst et al, 2011, Plötz et al, 2012.…”