Charging rate is measured in kW, not "KWH". Also see viewtopic.php?p=497654#p497654
may help the OP.
To be clear, 2013 to 2015 base S trim only have 3.x kW OBC. Charge package adds CHAdeMO inlet for DC fast charge capability (often colloquially and incorrectly called "level 3") and upgrades the OBC to 6.x kW, which increases the vehicle's acceptance rate over J1772.
'13 to '15 SV and SL include 6.x kW OBC, however CHAdeMO inlet is optional on the SV. If you want that, you'd need to get the quick charge + LED headlights package.
OP, can you update your location info via your user name in the upper right > User Control Panel > Profile tab? That way, we don't need to ask in future posts/threads or do sleuthing to deduce it.
What are your daily driving needs in terms of miles? How much city vs. highway? Will you have the ability to charge at your work/destinations?