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General Automotive General automotive discussion. This is intended to be a discussion about other not VW and Diesel cars you may have or interested in.

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Old June 15th, 2019, 09:39   #4846
bwilson4web
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Join Date: Feb 2009
Location: Huntsville, AL
Fuel Economy: 133/56 MPGe/MPG, 117/40
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Quote:
Originally Posted by Tin Man View Post
$80 in approximate charging fees for about 700 miles may seem like a lot to us diesel geezers. I get 550 miles on $47 with one 5 minute fillup with my 5-series BMW.
Total estimated EV costs, $80, is for the round trip, 1,400 miles. I'm expecting ~$40 for each 700 mi leg.
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Originally Posted by Tin Man View Post
Just saying. 2.5 hours of charging each way seems somewhat problematic compared to 10 minutes at the fuel station. Thanks for the info. Interesting conference.
The trip planning tool only supports half hour, charging increments. One goal of this trip is to measure the actual times and validate a charging strategy I modeled. The issue is which charging approach is better:
  • Maximum distance charge and drive bypassing chargers
  • Minimum distance charge hopping charger-to-charger
  • Something in between
My charging model suggests the optimum charging time is closer to 16 minutes. This is the SuperCharger profile for my Standard Range Plus Model 3:


So I combined travel time and distance at 65 mph with charging time delay and came up with this optimization curve for fastest travel time:
  • Too frequent charging is cheapest but slows the block-to-block travel time due to ramp-up delay.
  • Too long charging, carries the extra charge past a charger and is slower because of the charge taper delay.
  • There appears to be a 'sweet spot' where the travel time is fastest and cost moderate.

Although complex, this graph shows the tradeoff:


This trip will validate my model with real world data. I also get to attend the conference.

I chose the Standard Range Plus Model 3 because the relatively smaller battery, 2/3d the kWh, 50-55 kWh, and lightest battery weight of the long range trims. The vehicle weight, ~3,711 lbs, maximizes the miles per kWh, ~4 mi/kWh which is the best of the Model 3 trims. FYI, I'm a 'green' as in 'Greenback Yankee dollars kept in my wallet' which is my primary motivator.

Bob Wilson

ps. This car replaced the Prius Prime and it was pretty miserly. For example, the Prius drive home, 1,200 miles, took 22 gallons, ~$55. Being an old man, I took frequent biology breaks for coffee and pee breaks which now overlap with the Model 3 charging.
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Own:2019 Tesla Std. Rang. Plus Model 3
Own: 2014 BMW i3-REx: 34k mi / 40k total
Traded-in: 2017 Prius Prime Plus: 16k mi / 16k mi
Sold: 2010 Prius: 73k mi / 73k mi
Sold: 2003 Prius: 124k mi / 173k total

Last edited by bwilson4web; June 15th, 2019 at 10:29.
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Old June 23rd, 2019, 08:30   #4847
bwilson4web
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Source: Munro EV trip report

Bob Wilson
__________________
Own:2019 Tesla Std. Rang. Plus Model 3
Own: 2014 BMW i3-REx: 34k mi / 40k total
Traded-in: 2017 Prius Prime Plus: 16k mi / 16k mi
Sold: 2010 Prius: 73k mi / 73k mi
Sold: 2003 Prius: 124k mi / 173k total
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Old June 23rd, 2019, 12:05   #4848
compu_85
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Location: Springfield VA
Fuel Economy: 3.3 Mi/kWh
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Thanks for sharing your thoughts on that event. Looks like there was a bunch of info shared!
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Present:
2018 Tesla Model 3 DM. 20,000 miles.
2014 Cadillac ELR. 34,000 miles.
2013 Fiat 500e. 28,000 miles.
99.5 Jetta "GLX" TDI. 323,000 miles. Power Memory Seats, HIDs 11mm pump, BV39 Turbo, RCIII 36/47 MPG.
1991 Mercedes 350SDL 230,000 miles, 70,000 on engine. 18/27 MPG.
Past:
2012 Passat SE TDI DSG. 114,000 miles. LED tails, Memory Seat, HIDs. Bought back by VW.
2004 Touareg V10 TDI. 165,000 miles. Sold to Matt98AHU w/ flat camshafts.
1988 Audi 5000S Quattro, 1992 Jetta ECOdiesel, 1991 Jetta ECOdiesel.
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Originally Posted by BRUSSELS BELGIAN View Post
Maybe I should pay MYSELF to do bad work on my car!
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