Yep! See my signature for details on the simple (and inexpensive) adapter that makes your OEM chargecord L2 capable.The charge cord (EVSE) provided with the 2016 and later Volts is not only waterproof, it is 240 V capable. If you can rewrite your outdoor receptacle to 240 V with a 240 V capable and a 240 V outlet (NEMA 6-15 or 6-20). Then you can charge your Volt twice as fast. This is useful to add some extra miles after work before going out for the evening, and between errands on the weekend.
Lots of reading to be had in links found in Chris TX's sig.GSP, is this documented somewhere? I had seen the rumor of this elsewhere, but didn't see specs on this charger being 240 AC capable.