I've looked through several of the pages but admittedly not all, so if this question was asked already, I apologize. What would you say is the added cost to your electric bill, in dollars, percent, or however you can best describe? Obviously this is a loaded question and dependent on lots of other factors, but I'm curious what that hit looks like each month/year for charging an EV.
So many factors…
For me, it’s difficult to say with certainty because the weather has been weird, we’ve added some other devices, I run a compute business from home with wildly varying compute demands from week to week, we have solar panels and a backup battery, etc., etc., etc.
The easiest way for me to say is to estimate cost per mile of the BEV and compare that with the cost per mile of the gas vehicle it replaced.
tl;dr:
I estimate that we’re saving about $3800/year (plus/minus about $1500) in energy costs compared with driving our two most recent gas vehicles. Averaging that over 12 months is about $320/month savings. This also assumes $3.50/gallon gas, which is way low compared with today’s gas prices. If you increase gas prices to the average in our area, the estimate is about 50% too low (if gas prices stay what they are today, we’ll save more like $5700/year).
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We are fairly strict about trying to charge during super-off-peak time (10:00 to 15:00). When we’re successful at doing that for run-around-town driving, we pay $0.03495/kWh. With the Mustang getting around 4 miles/kWh and the Lightning getting around 2.5 miles/kWh, that’s $0.008/mile for the Mustang and $0.014/mile for the Lightning.
If we only did around-town driving, that would be:
16,000 miles/year in the Lightning means $224/year energy cost for the Lightning.
14,500 miles/year in the Mustang means $116/year energy cost for the Mustang.
However, we do road trips for about half of our total miles, more than half in the Lightning and less than half in the Mustang. If I use an average of $0.48/kWh cost for those trips:
Lightning (10,000 miles/year road trips, 6,000 miles/year around-town):
$0.48/kWh / 2.3 miles/kWh = $0.21/mile road trips and $0.014/mile around town...
$0.21 * 10,000 + $0.014 * 6000 = $2184/year for energy.
Mustang (4500 miles road trips and 10,000 miles around town):
$0.48/kWh / 3.7 miles/kWh = $0.13/mile road trips
$0.13 * 4500 + 0.014*10000 = $725/year for energy.
The Tacoma we had prior only got 8-16 miles/gallon, depending on if I was really babying it at 45 mph or if I was towing or driving around town. The average was about 12 mpg.
For a 16,000 mile/year driving habit, with gas at around $3.50/gallon, the annual cost of fuel was about $4700.
Our Golf Alltrack was not very impressive with only about 25 mpg, at best. For 14500 miles/year, average of $3.50/gallon, that estimate is $2030/year in fuel costs.