Feel free to post them now. The test does not require exactly 20%, any more than it requires exactly 80% ;-)GaryHere said:I should have the numbers from the test today, I'm at 26% SOC.
This symbol
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means 'approximately'
Feel free to post them now. The test does not require exactly 20%, any more than it requires exactly 80% ;-)GaryHere said:I should have the numbers from the test today, I'm at 26% SOC.
SageBrush said:Feel free to post them now. The test does not require exactly 20%, any more than it requires exactly 80% ;-)GaryHere said:I should have the numbers from the test today, I'm at 26% SOC.
This symbol
~
means 'approximately'
SageBrush said:Feel free to post them now. The test does not require exactly 20%, any more than it requires exactly 80% ;-)GaryHere said:I should have the numbers from the test today, I'm at 26% SOC.
This symbol
~
means 'approximately'
GaryHere said:SageBrush said:GaryHere said:Exactly 80% to 20% SOC just now.
49.3 miles driven
4.9 miles/kWh
SageBrush said:
During this test you consumed
49.3 miles / 4.9 miles/kWh = 10.06 kWh and you used 60% of your battery capacity
So the full battery capacity would be
10.06/0.6 = 16.77 kWh **
Interp: I'd do a couple more tests to be sure, but based on this test the 12th bar should drop any day now
----
Are you able to recharge at a station that reports energy delivered ?
It would be nice to confirm the results of this first test
**
Two key assumptions here:
The miles/kWh meter was reset at the beginning of the test and not reset thereafter
No additional recharges during the test
Yes, the 0.6 is the 60% SoC usedGaryHere said:The 0.6 figure is the 60% I used?
And then that's taken and times the kWh used we arrive at 16.77 kWh capacity on a supposedly 24 kWh battery (21 available when it's new) which leads to my second bolded.....NOT good.
SageBrush said:Yes, the 0.6 is the 60% SoC usedGaryHere said:The 0.6 figure is the 60% I used?
And then that's taken and times the kWh used we arrive at 16.77 kWh capacity on a supposedly 24 kWh battery (21 available when it's new) which leads to my second bolded.....NOT good.
And the the kWh used divided by
the SoC used gives the total battery capacity.
To see why the arithmetic works this way, imagine you first want to know how many kWh you have in ONe percent:
That would be 10.06 kwh / 60 = 0.167 kWh
Then 100% SoC is 0.167 * 100 = 16.7 kWh
Recharging at a place that reports kWh from the meter is a good idea.
Your other choice is to buy an OBDII adapter. If LeafSpy agrees with 16.7 kWh you have a reliable answer. If not, then more testing is in order.
Sorry I could not be the bearer of better news but it is not terrible. At 4.9 miles a kWh you have a total range of 4.9*16.7 = ~ 80 miles, or figure 70 miles with a little security. The tougher question is how quickly the battery will degrade in Tuscon.
I wish you well, however you decide
-- Eric
LeftieBiker said:I'm going to withdraw my guess. I tend to make mistakes this late at night. ;-) I will say that based on an 80% charge you got good range and great efficiency.
GaryHere said:Wouldn't the speed driven influence those results of the kWh used?
I mean if I drove at 75mph from 80 to 20% SOC wouldn't that yield different results than my driving this recent test at about 20-35 mph?
I'd say pretty average.GaryHere said:Do you think the lessened capacity is typical for the age of the battery? 3 years old?
ACCURACY POLICE HERE. TAKE YOUR HANDS OFF THE KEYBOARD.goldbrick said:For this type of measurement, both the numerator and denominator would be changed by equal amounts so the battery capacity result should be unchanged.
goldbrick said:GaryHere said:Wouldn't the speed driven influence those results of the kWh used?
I mean if I drove at 75mph from 80 to 20% SOC wouldn't that yield different results than my driving this recent test at about 20-35 mph?
The battery measurement shows how much kWh capacity the battery has. Once the battery capacity is known, you can use that capacity in any way you want. Driving faster will use more power due to increased drag and result in less range. For max range, drive slower.
For this type of measurement, both the numerator and denominator would be changed by equal amounts so the battery capacity result should be unchanged.
SageBrush said:I'd say pretty average.GaryHere said:Do you think the lessened capacity is typical for the age of the battery? 3 years old?
Excuse my nature, but let me ask one last time:
Only one charge to bring the SoC up to ~ 80% at the start of the test, and no recharges since, right ?
And second, the miles/kWh meter was zeroed when SoC hit 80% -- again right ?
GerryAZ said:I would rather see you run a longer range/battery capacity test if you are concerned before deciding to give up the car. I notice that the SOC% and SOC bar drops are not always linear so a test from full charge to LBW (or even VLBW) would give more accurate results. Also, I find that the mi/kWh number on the dash is generally a little high compared to measuring charging energy from the wall with an accurate watt-hour meter and calculating the actual miles/kWh so you may have actually used more than 10 kWh from the battery during your test (which would imply that the battery has more capacity than Eric calculated).
powersurge said:I am also certainly glad that GaryHere is trading in his Leaf....
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