Reddy wrote:Unless you're starting inside a warm garage, preheating below 20 F with L1 is nearly worthless and you will probably consume some battery.
This is not my experience...we've had our share of arctic weather here in WI too.
What my lady does for her trip to work is, charge her MY2013 to 100% on L1, but then after that a substantial amount (1-2 hours) of preheating activated by Carwings. While it is certainly reducing the 12th bar by the time she gets driving, the car is nicely heat soaked, even when it's 0F. Starting with the car warm, she is able to keep the car at a reasonable temperature during her 18 mile one way trip to work at speeds of 40-50. She arrives consistently into the 5th bar, so 8 bars are still showing.
Here is where I can't be of any help, because when it's this cold (below 10F), I come and snag the car and return it to her when she is getting done with work, charged and preheated. So in sub-zero temps, I'd presume that she'd use the rest of the battery trying to keep warm and getting home without me charging for her. When the weather is in the teens or higher, she arrives home with 2 bars or so.
BTW, she does not garage her Leaf, it sits out in the ambiant elements. I have a heated (38 degrees) shop for MY2012 where the Siemens EVSE is located.
While this may be a moot point by the time the OP is wanting the information, I can have her jot down the battery level percentages when she leaves after preheating, and when she get to work.
2012 SL. Leased 12-29-12, two year lease. Returned 12-29-14
2013 SV. Leased 4-30-13, two year lease. Extended on 5-1-15, returned 5-1-16.
2015 SV Leased 12-9-14 two year lease. Returned 12-8-16.
2015 SV Leased 4-22-15, purchased on 9-19-18.