- Joined
- Sep 10, 2023
- Messages
- 664
- Reaction score
- 632
- Location
- Miami/Ft Lauderdale, Florida
- Cars
- 23' Air Touring
Ever since I got my Touring with 19 inch wheels, I have been preoccupied with efficiency. I guess in the back of my mind, driving an EV requires a certain degree of energy efficiency. I have been driving fast then slow, even tried with and without AC. I will never see the 425 EPA range stated when I bought the car. But, I have driven about 310 miles once without charging. My range should be between 290 miles to 350 miles on the Touring depending on weather, AC, and speed.
But today, I did a little more math. My efficiency when I drive slowly and carefully (with AC always on since I live in South Florida) is 3.7 m/kwh. When I drive normally which is relatively faster than most, about 80 to 85 mph on short highway miles to/from work, I get 3.3 m/kwh. So what is the actual cost of this reduced efficiency?
Well, it costs me $0.178 cents per kw at home including the approx. 10% loss on charge. (My ChargePoint home flex pretty much always shows that it delivered about 10% more kw to my car than the car says it received.). If I drive the estimated 12,000 miles per year at 3.3 m/kwh (faster) instead of 3.7 m/kwh (slower) the additional cost per month in my electric bill would be approx. $5.82. Wow that was a surprise as I expected it would cost much more.
My total cost per month of electricity at 3.3 m/kwh is about $48.06 per month. At 3.7 m/kwh it would be $53.88. In either case much less than my previous BMW 7 series cost in gas a month.
From now on, I will just drive fast, enjoy the car and not worry about m/kwh. I know most of you already do this!
BTW, I mostly charge at home and have used EA for free every time I travel. I have not paid once for a charge outside of my house.
But today, I did a little more math. My efficiency when I drive slowly and carefully (with AC always on since I live in South Florida) is 3.7 m/kwh. When I drive normally which is relatively faster than most, about 80 to 85 mph on short highway miles to/from work, I get 3.3 m/kwh. So what is the actual cost of this reduced efficiency?
Well, it costs me $0.178 cents per kw at home including the approx. 10% loss on charge. (My ChargePoint home flex pretty much always shows that it delivered about 10% more kw to my car than the car says it received.). If I drive the estimated 12,000 miles per year at 3.3 m/kwh (faster) instead of 3.7 m/kwh (slower) the additional cost per month in my electric bill would be approx. $5.82. Wow that was a surprise as I expected it would cost much more.
My total cost per month of electricity at 3.3 m/kwh is about $48.06 per month. At 3.7 m/kwh it would be $53.88. In either case much less than my previous BMW 7 series cost in gas a month.
From now on, I will just drive fast, enjoy the car and not worry about m/kwh. I know most of you already do this!
BTW, I mostly charge at home and have used EA for free every time I travel. I have not paid once for a charge outside of my house.