A lot has been made about the efficiency of the LV1 vs. LV2 charging
. If you are making a decision based on cost savings between these two (that is, the recapture of the "wasted" kwh because of the longer recharge time of LV1) and not on the speed of the charging cycle (LV2 faster), you are wasting your time.
Using the provided example, you could recapture approximately 740 kwh/yr using the LV2 over the LV1. Even at my outrageous 14.4 cents per kwh, that's a yearly savings of about $107. If I could install a LV2 charger for about $1,200 (EVSE plus installation), the payback on that installation is 11 years
. A lot more if the price of the EVSE LV2 charging station plus installation is greater than $1,200.
Not a very good investment.
The above, of course, is based on stable electricity costs (maybe) and the EVSE LV2 charger staying the same price (not likely). Conjigure with those two inputs and the payback period may be a bit shorter if the charger comes down in price and electricity rates rise significantly.
In my particular case (based on yearly estimated driving), the payback period is 25 years. So, unless you need the benefit of a fast charge vs. a slow charge, there is no need to use an LV2 IF what you are after is significant efficiency cost savings between the two systems.
I only use an LV1 and do just fine.