I generally get pretty close to 120v at my house and a tad under 240 but note while commercial power you may be 120v you almost always only get 208v(or down to 205v) for 240v equiv, because of the whole 3-phase thing.
2012 SL purchased used 2/'16
2013 S w/QC purchased new
Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
Zencar 13, 20, 30a L1/L2 portable EVSE
GE Durastation 30a