William Erks

I live near San Diego, Utility SD&E My Tier Rates: $0.15, $0.17, $0.35, $0.037 The 1st 344kWh used is .15 The next 103kWh used is .17 The next 344kWh used is .35 Any thing remaining uses: .37 For me on my bills it comes out to an average of $0.28 per kWh The TOU rates would be: Super Off-Peak $0.16, Off-Peak $0.20, On-Peak $0.44 I'm not entirely interested in talking about SDG&E there is not much I can do about it other then switch to TOU, which would shift my cost up, do to my working hours being shifted. Don't get me wrong, the car is preforming well, I was only getting 11-13 MPG with the 2005 Jeep GC About 65% of my driving is on the freeway I have installed a Kill a watt meter, and am going to track power consumption until the next fill up. Battery range is about 16miles, with climate control set to 72, I am consistently getting 5.4kWh out of the battery Their is no easy answer, in hybrid mode I was still getting 45 MPG - Gas 0.09 a mile, while in AUTO mode, it was 98 MPG - Gas 0.04 a mile and Electric was .11 a mile It really comes down to, in my case is it cheaper to just run in Hybrid mode vs plugging it in, until Gas prices come up or eclectic prices go down?

my goal is really to get a ruff average cost per mile, but the results thus far seem all over the place. Larryh: yes, my trips are short, the examples above were pulled form one day, 11 miles home to work, 4 miles work to lunch, 5 miles lunch to work, and then 11 miles to home, without charging 2 New Trips Trip 1 charged Battery Miles Traveled: 21.1, kWh Used: 5.3, EV Miles 18.6, Fuel Economy(MPG) 98.2, Regen Miles: 2.5 Trip 2: Depleted Battery Miles Traveled: 21.1, kWh Used: 0.1, EV Miles 9.4, Fuel Economy(MPG) 45.9, Regen Miles: 2 Trip 1 Gas Cost Per Mile: 0.042, Electric Cost per Mile: 0.118 Trip 2 Gas Cost Per Mile: 0.089, Electric Cost per Mile: 0.005 (I depleted the battery but still got a .1 kWh in there some how) KyBuck: My understanding from observation is EV Miles is a total, With the only spreadable stat, is coasting / Regen Braking Thus a subtraction from EV Miles, should not be required when trying to determine cost of Gas Per Mile Also I did start by subtracting the EV miles from the total, but oddly enough the final results were the same when not subtracting the EV miles Remaining stats grouped into EV Miles after subtraction represents any ICE Regen and Battery usage. Which is understandably difficult to separate I think I will refill the gas tank today and then the kilo watt meter as suggested, for one week and see if I can see the average ruff cost of a mile traveled. I have tier rates (SDG&E) the weighted average comes out to $0.28 a kWh, I have thought of switching over to TOU but this seems scary at $0.44 a kWh on peak, but does drop $0.16 for super off peak

Ok, changing the Gas formals to remove EV Miles Gallons of Gas Used = Miles Traveled / Fuel Economy(MPG) 0.158, 0.103, 0.058, 0.262 Gas Cost Per Trip = Gallons of Gas Used * Cost of Gas(4.11) 0.652, 0.425, 0.239, 1.077 Gas Cost Per Mile = Gas Cost Per Trip / Miles Traveled 0.058, 0.085, 0.053, 0.095 Oddly the final results are the same Next changing the Efficiency Raito to 72% (1.28) Electric Cost Per Trip = (kWh Used * Cost of kWh(0.28)) * Efficiency(1.28) 0.501, 0.286, 0.465, 0.573 Electric Cost Per Mile = Electric Cost Per Trip / (EV Miles - Regen Miles) 0.096, 0.136, 0.150, 0.119 Comparing the Trips again Trip 1: Gas $0.058 vs Electric $0.096 Trip 2: Gas $0.085 vs Electric $0.136 Trip 3: Gas $0.053 vs Electric $0.150 Trip 4: Gas $0.095 vs Electric $0.119 Average 0.072 vs 0.125 As the Regen counts as EV Miles, I am subtracting the regen miles from the EV miles.

I am trying to figure out a ruff/average cost estimate per mile. Something didn't seem right, so I though I would run it by you guys. Information from myfordmobile.com Trip 1: Miles Traveled: 11.2, kWh Used: 1.4, EV Miles: 6.7, Fuel Economy(MPG): 70.6, Regen Miles: 1.5 Trip 2: Miles Traveled: 5, kWh Used: 0.8, EV Miles: 2.9, Fuel Economy(MPG): 48.3, Regen Miles: 0.8 Trip 3: Miles Traveled: 4.5, kWh Used: 1.3, EV Miles: 3.7, Fuel Economy(MPG): 77.3, Regen Miles: 0.6 Trip 4: Miles Traveled: 11.3, kWh Used: 1.6, EV Miles: 5.8, Fuel Economy(MPG): 43.1, Regen Miles: 1 So my 1st Calculation is "Gallons of Gas Used": =(Miles Traveled - EV Miles) / Fuel Economy(MPG) I end up with 0.063, 0.043, 0.01, 0.127 The "Cost of Gas" was $4.11 my 2n Calculation is "Gas Cost Per Trip" =Gallons of Gas Used * Cost of Gas(4.11) I end up with $0.26, $0.17, $0.04, $0.52 3rd Calculation is "Gas Cost Per Mile" =Gas Cost Per Trip/ (Miles Traveled - EV Miles) I end up with $0.058, $0.085, $0.053, $0.095 Next I wanted to compare the cost of Electricity Per Mile "Cost kWh": $0.28 from my utility SDG&E 120 volt "Efficiency" rating 60%, (1.4) my 1st Calculation is "Electric Cost Per Trip" =(kWh Used * Cost kWh) * Efficiency I end up with $0.54, $0.31, $0.51, $0.62 2nd Calculation is Electric Cost Per Mile =Electric Cost Per Trip / (EV Miles - Regen Miles) I end up with $0.10, $0.15, $0.16, $0.13 Comparing the 2 side by side, Gas vs Electric Trip 1: $0.058 vs $0.105 Trip 2: $0.085 vs $0.149 Trip 3: $0.053 vs $0.164 Trip 4: $0.095 vs $0.130 Does this look right or am I making the wrong calculations? Average Gas Cost Per mile: $0.072 Average Electric Cost Per mile: $0.137