A question I have not seen answered is what charging amperage is most efficient for the Model S. I think I have the necessary data and I have begun to tabulate it as I charge each night. Before I get too far along, I thought I'd ask the teeming masses if there's anything else I should try to collect. Here's the current table:
Advice I'd appreciate:
- How many samples are required at each selected amperage?
- Should I try to collect other data?
- What metrics / ratios are most interesting?
- And other things you think of.
Sources:
- kWh: Powerhouse Dynamics SiteSage
- Charging Times & Mileages: VisibleTesla
- Charging: Tesla HPWC (80 amp)
* Deciles represent roughly how much of a charge was completed. 10 < 30 miles, 20 < 60 miles, etc.
Code:
[TABLE="width: 975"][TR][TD="width: 65"]Date[/TD][TD="width: 65"]kWh[/TD][TD="width: 65"]Temp F[/TD][TD="width: 65"]Pctge[/TD][TD="width: 65"]Amps[/TD][TD="class: xl65, width: 65"]Start Time[/TD][TD="class: xl66, width: 65, align: right"] Ideal[/TD][TD="class: xl66, width: 65, align: right"] Rated[/TD][TD="class: xl66, width: 65, align: right"] Estimated[/TD][TD="class: xl65, width: 65"]Stop Time[/TD][TD="class: xl66, width: 65, align: right"] Ideal[/TD][TD="class: xl66, width: 65, align: right"] Rated[/TD][TD="class: xl66, width: 65, align: right"] Estimated[/TD][TD="width: 65"]kWh/Ideal[/TD][TD="width: 65"]Minutes/Ideal[/TD][/TR][TR][TD="class: xl63, align: right"]12/7/14[/TD][TD="class: xl64"]30.998[/TD][TD="class: xl64, align: right"]45.7[/TD][TD="class: xl64, align: right"]90[/TD][TD="align: right"]40[/TD][TD="class: xl65, align: right"]1:00 AM[/TD][TD="class: xl66, align: right"] 155.0[/TD][TD="class: xl66, align: right"] 134.0[/TD][TD="class: xl66, align: right"] 116.5[/TD][TD="class: xl65, align: right"]4:06 AM[/TD][TD="class: xl66, align: right"] 261.6[/TD][TD="class: xl66, align: right"] 226.2[/TD][TD="class: xl66, align: right"] 196.3[/TD][TD="align: right"]0.290787992[/TD][TD="class: xl67, align: right"] 1.74[/TD][/TR][TR][TD="class: xl63, align: right"]12/6/14[/TD][TD="class: xl64"]34.387[/TD][TD="class: xl64, align: right"]54.7[/TD][TD="class: xl64, align: right"]90[/TD][TD="align: right"]40[/TD][TD="class: xl65, align: right"]1:01 AM[/TD][TD="class: xl66, align: right"] 144.2[/TD][TD="class: xl66, align: right"] 124.7[/TD][TD="class: xl66, align: right"] 119.7[/TD][TD="class: xl65, align: right"]4:37 AM[/TD][TD="class: xl66, align: right"] 262.0[/TD][TD="class: xl66, align: right"] 226.5[/TD][TD="class: xl66, align: right"] 221.7[/TD][TD="align: right"]0.291910017[/TD][TD="class: xl67, align: right"] 1.83[/TD][/TR][TR][TD="class: xl63, align: right"]12/5/14[/TD][TD="class: xl64"]18.479[/TD][TD="class: xl64, align: right"]61.5[/TD][TD="class: xl64, align: right"]90[/TD][TD="align: right"]80[/TD][TD="class: xl65, align: right"]1:02 AM[/TD][TD="class: xl66, align: right"] 200.0[/TD][TD="class: xl66, align: right"] 172.9[/TD][TD="class: xl66, align: right"] 172.5[/TD][TD="class: xl65, align: right"]1:57 AM[/TD][TD="class: xl66, align: right"] 262.0[/TD][TD="class: xl66, align: right"] 226.5[/TD][TD="class: xl66, align: right"] 226.2[/TD][TD="align: right"]0.298048387[/TD][TD="class: xl67, align: right"] 0.89[/TD][/TR][TR][TD="class: xl63, align: right"]12/4/14[/TD][TD="class: xl64"]38.272[/TD][TD="class: xl64, align: right"]58.3[/TD][TD="class: xl64, align: right"]90[/TD][TD="align: right"]80[/TD][TD="class: xl65, align: right"]1:02 AM[/TD][TD="class: xl66, align: right"] 116.6[/TD][TD="class: xl66, align: right"] 100.8[/TD][TD="class: xl66, align: right"] 95.0[/TD][TD="class: xl65, align: right"]3:07 AM[/TD][TD="class: xl66, align: right"] 261.6[/TD][TD="class: xl66, align: right"] 226.2[/TD][TD="class: xl66, align: right"] 213.5[/TD][TD="align: right"]0.263944828[/TD][TD="class: xl67, align: right"] 0.86[/TD][/TR][TR][TD="class: xl63, align: right"]12/3/14[/TD][TD="class: xl64"]37.16[/TD][TD="class: xl64, align: right"]48.9[/TD][TD="class: xl64, align: right"]90[/TD][TD="align: right"]80[/TD][TD="class: xl65, align: right"]1:02 AM[/TD][TD="class: xl66, align: right"] 133.1[/TD][TD="class: xl66, align: right"] 115.1[/TD][TD="class: xl66, align: right"] 115.1[/TD][TD="class: xl65, align: right"]2:52 AM[/TD][TD="class: xl66, align: right"] 261.2[/TD][TD="class: xl66, align: right"] 225.8[/TD][TD="class: xl66, align: right"] 226.3[/TD][TD="align: right"]0.29008587[/TD][TD="class: xl67, align: right"] 0.86[/TD][/TR][/TABLE]
- How many samples are required at each selected amperage?
- Should I try to collect other data?
- What metrics / ratios are most interesting?
- And other things you think of.
Sources:
- kWh: Powerhouse Dynamics SiteSage
- Charging Times & Mileages: VisibleTesla
- Charging: Tesla HPWC (80 amp)
Code:
[TABLE="width: 410"][TR][TD][/TD][TD]Summary[/TD][TD][/TD][TD][/TD][TD][/TD][TD][/TD][TD][/TD][/TR][TR][TD]Amps[/TD][TD]# Samples[/TD][TD]Min kWh/Ideal[/TD][TD]Avg kWh/Ideal[/TD][TD]Max kWh/Ideal[/TD][TD]StdDev kWh/Ideal[/TD][TD]Avg Minutes/Ideal[/TD][/TR][TR][TD]40[/TD][TD="align: right"]3[/TD][TD="align: right"]0.292[/TD][TD="align: right"]0.295[/TD][TD="align: right"]0.303[/TD][TD="align: right"]0.006[/TD][TD="align: right"]1.8[/TD][/TR][TR][TD]80[/TD][TD="align: right"]3[/TD][TD="align: right"]0.264[/TD][TD="align: right"]0.284[/TD][TD="align: right"]0.298[/TD][TD="align: right"]0.018[/TD][TD="align: right"]0.9[/TD][/TR][TR][TD]60[/TD][TD="align: right"]2[/TD][TD="align: right"]0.282[/TD][TD="align: right"]0.290[/TD][TD="align: right"]0.297[/TD][TD="align: right"]0.010[/TD][TD="align: right"]1.1[/TD][/TR][TR][TD]Grand Total[/TD][TD="align: right"]8[/TD][TD="align: right"]0.264[/TD][TD="align: right"]0.290[/TD][TD="align: right"]0.303[/TD][TD="align: right"]0.012[/TD][TD="align: right"]1.3
[/TD][/TR][/TABLE]
[TABLE="width: 410"][TR][TD][/TD][TD]Deciles[/TD][TD][/TD][TD][/TD][TD][/TD][TD][/TD][TD][/TD][/TR][TR][TD]Amps[/TD][TD]# Samples[/TD][TD]Min kWh/Ideal[/TD][TD]Avg kWh/Ideal[/TD][TD]Max kWh/Ideal[/TD][TD]StdDev kWh/Ideal[/TD][TD]Avg Minutes/Ideal[/TD][/TR][TR][TD]40[/TD][TD="align: right"]3[/TD][TD="align: right"]0.292[/TD][TD="align: right"]0.295[/TD][TD="align: right"]0.303[/TD][TD="align: right"]0.006[/TD][TD="align: right"]1.8[/TD][/TR][TR][TD="align: right"] 40[/TD][TD="align: right"]2[/TD][TD="align: right"]0.292[/TD][TD="align: right"]0.292[/TD][TD="align: right"]0.292[/TD][TD="align: right"]0.000[/TD][TD="align: right"]1.8[/TD][/TR][TR][TD="align: right"] 10[/TD][TD="align: right"]1[/TD][TD="align: right"]0.303[/TD][TD="align: right"]0.303[/TD][TD="align: right"]0.303[/TD][TD="align: center"]#DIV/0![/TD][TD="align: right"]1.9[/TD][/TR][TR][TD]80[/TD][TD="align: right"]3[/TD][TD="align: right"]0.264[/TD][TD="align: right"]0.284[/TD][TD="align: right"]0.298[/TD][TD="align: right"]0.018[/TD][TD="align: right"]0.9[/TD][/TR][TR][TD="align: right"] 30[/TD][TD="align: right"]1[/TD][TD="align: right"]0.298[/TD][TD="align: right"]0.298[/TD][TD="align: right"]0.298[/TD][TD="align: center"]#DIV/0![/TD][TD="align: right"]0.9[/TD][/TR][TR][TD="align: right"] 50[/TD][TD="align: right"]2[/TD][TD="align: right"]0.264[/TD][TD="align: right"]0.277[/TD][TD="align: right"]0.290[/TD][TD="align: right"]0.018[/TD][TD="align: right"]0.9[/TD][/TR][TR][TD]60[/TD][TD="align: right"]2[/TD][TD="align: right"]0.282[/TD][TD="align: right"]0.290[/TD][TD="align: right"]0.297[/TD][TD="align: right"]0.010[/TD][TD="align: right"]1.1[/TD][/TR][TR][TD="align: right"] 30[/TD][TD="align: right"]1[/TD][TD="align: right"]0.297[/TD][TD="align: right"]0.297[/TD][TD="align: right"]0.297[/TD][TD="align: center"]#DIV/0![/TD][TD="align: right"]1.1[/TD][/TR][TR][TD="align: right"] 40[/TD][TD="align: right"]1[/TD][TD="align: right"]0.282[/TD][TD="align: right"]0.282[/TD][TD="align: right"]0.282[/TD][TD="align: center"]#DIV/0![/TD][TD="align: right"]1.1[/TD][/TR][TR][TD]Grand Total[/TD][TD="align: right"]8[/TD][TD="align: right"]0.264[/TD][TD="align: right"]0.290[/TD][TD="align: right"]0.303[/TD][TD="align: right"]0.012[/TD][TD="align: right"]1.3[/TD][/TR][/TABLE]
* Deciles represent roughly how much of a charge was completed. 10 < 30 miles, 20 < 60 miles, etc.
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