I think your calculations are just a little off Cole. The average electricity price in New Jersey is 17.27¢ per kWh which ranks 12th highest in the United States. They rank in the bottom half of the country. Even though your car says it only used 35kw to drive 100 miles, to recharge the batteries with that 35KW isn't on a 1:1 ratio and it actually use up to 20% more power to recharge that same 35KW. Unless, you have a totalizing wattmeter on your charger at home you'll really never know what the actual cost to recharge those batteries are.
The main utility company in NJ is PSE&G and there is a 10.5 cent credit for home charging if you have signed up with the program. My standard KW rate is slightly less than 19 cents/KW, therefore, with the credit it is less than 9 cents per KW.
My home charger is energy star rated and the loss thru the charger is less than 2% (the efficiency is stated in the manufacturers website) and has to be 3rd party verified to achieve the energy star rating. The loss thru the charger is not weather dependent. The efficiency decrease in the winter is displayed in the KW/mile meter. It is very straightforward to quantify this.
Right now I am averaging well over 4 miles per KW since the temperature is in the 50's/low 60s and still charging for free thru electriy america (EA). So far, over 63,000 miles have been driven for "free" and we only charge at home when the EA charging station is screwed up. This will change in June when the unlimited free charging runs out and EA currently charges 58 cents per KW. In summation, its a crack head good deal to use the EVs for running around.