Michael Bornstein
Well-known member
- Joined
- Oct 29, 2012
- Messages
- 280
In the past, Tony posted a Range Chart ( http://www.myrav4ev.com/forum/viewtopic.php?f=2&t=67) that gave the expected range of a new battery vs speed. For those taking long trips, what is also important is the time you have to cool your heels while your car recharges. The chart below assumes a 100 mile journey and gives the total drive time, charge time, and their sum for both a public L2 charger and a home 40A charger. Unfortunately, there is no free lunch. the faster you go, the longer the total trip takes, although the difference on a 40A charger is small from 45mph to 65mph. The difference is greater with the 30A public charger. This means that you should look for NEMA 14-50 plugs whenever you can.
Total time for Driving and Charging (Obviously you can't go 100mi at 85 mph in the RAV4 EV)
Speed (mph)______________________45____50_____55____60______65____70_____75____80_____85
Time for 100mi (hours)____________2.22___2.00___1.82___1.67____1.54___1.43___1.33___1.25___1.18
miles/kWh_______________________4.7____4.3____3.9____3.6_____3.4____3.1____2.7____2.4____2.0
kWh/100mi_____________________21.3___23.3___25.6___27.8____29.4___32.23___37.0___41.6___50.0
Charge time @ 208V 30A (hours) ____3.90___4.26___4.70___5.09____5.39___5.91___6.78___7.63___9.16
Total time for Public Charger (hours)__6.12___6.26___6.51___6.75____6.93___7.34___8.12 ___8.88__10.33
Charge time @ 240V 40A (hours) _____2.53___2.77___3.05___3.31____3.50___3.84___4.41___4.96___5.95
Total time for Home Charger (hours)__4.76___4.77___4.87___4.97____5.04____5.27___5.74___6.21___7.13
According to the chart, there is only a 17 min difference between 45 and 65 if you have a 40A charger, but a 49 min difference with the 30A charger. The 30A charger also takes 1h:55m longer to charge than the 40A charger. These calculations are all based on a 87.5% charger efficiency. I hope this data will be helpful for those planning long trips.(I apologize for my inability to format the table correctly)
Total time for Driving and Charging (Obviously you can't go 100mi at 85 mph in the RAV4 EV)
Speed (mph)______________________45____50_____55____60______65____70_____75____80_____85
Time for 100mi (hours)____________2.22___2.00___1.82___1.67____1.54___1.43___1.33___1.25___1.18
miles/kWh_______________________4.7____4.3____3.9____3.6_____3.4____3.1____2.7____2.4____2.0
kWh/100mi_____________________21.3___23.3___25.6___27.8____29.4___32.23___37.0___41.6___50.0
Charge time @ 208V 30A (hours) ____3.90___4.26___4.70___5.09____5.39___5.91___6.78___7.63___9.16
Total time for Public Charger (hours)__6.12___6.26___6.51___6.75____6.93___7.34___8.12 ___8.88__10.33
Charge time @ 240V 40A (hours) _____2.53___2.77___3.05___3.31____3.50___3.84___4.41___4.96___5.95
Total time for Home Charger (hours)__4.76___4.77___4.87___4.97____5.04____5.27___5.74___6.21___7.13
According to the chart, there is only a 17 min difference between 45 and 65 if you have a 40A charger, but a 49 min difference with the 30A charger. The 30A charger also takes 1h:55m longer to charge than the 40A charger. These calculations are all based on a 87.5% charger efficiency. I hope this data will be helpful for those planning long trips.(I apologize for my inability to format the table correctly)