CAC of the original Roadster battery

[Mitrovic]

Checked today. My 2010 Roadster Sport has a CAC of 139.5. 60 000 KM.

Wasn't there a graph showing the CAC numbers of the original Roadster battery?

 

[dhrivnak]

Checked today. My 2010 Roadster Sport has a CAC of 139.5. 60 000 KM.

Wasn't there a graph showing the CAC numbers of the original Roadster battery?

About 157 is the CAC Level on the original battery when new. Yours sounds about right for the age and mileage.

 

[gregd]

Checked today. My 2010 Roadster Sport has a CAC of 139.5. 60 000 KM.

Wasn't there a graph showing the CAC numbers of the original Roadster battery?

That is exactly what my car (also a 2010, but non-sport) has. 46k miles, 139.5 CAC. Standard charge comes in at about 163 miles. I think we're slightly on the lower side of normal, but still very much within the expected range.

I think the graph you are referring to is the battery survey that was conducted a few years ago, posted here: https://survey.pluginamerica.org/tesla-roadster/PIA-Roadster-Battery-Study.pdf

 

[Mitrovic]

Absolutely! Thank you!

 

[ICON]

I have a 2.5 2011 standard model

SOC: LIM 85% Min 85% MAX 88%
RR 172 Miles
My car has 60,000 km on it, with a CAC of 144.2 and charges in the morning at work on 32A and at night 10A standard charge to 136 Miles.

 

[gregd]

I have a 2.5 2011 standard model

SOC: LIM 85% Min 85% MAX 88%
RR 172 Miles
My car has 60,000 km on it, with a CAC of 144.2 and charges in the morning at work on 32A and at night 10A standard charge to 136 Miles.

A CAC of 144.2 should Standard charge to something about 170 miles, not 136. You might want to look at the battery's cell balance, or do a discharge to 20%, followed by range charge, and see if that number improves. Something's not quite right.

 

[supersnoop]

I have a 2.5 2011 standard model

SOC: LIM 85% Min 85% MAX 88%
RR 172 Miles
My car has 60,000 km on it, with a CAC of 144.2 and charges in the morning at work on 32A and at night 10A standard charge to 136 Miles.

A CAC of 144.2 should Standard charge to something about 170 miles, not 136. You might want to look at the battery's cell balance, or do a discharge to 20%, followed by range charge, and see if that number improves. Something's not quite right.

That could be estimated instead of ideal miles. Or I could read that as it doesn’t fully charge overnight on 110v. Ironically, the 10a charge should result in a higher than expected range. All the more reason that CAC is the number to use.

 

[markwj]

That could be estimated instead of ideal miles.

That would be my guess: Estimated not Ideal.

CAC and Ideal Range on full charge should track each other.

 

[ICON]

Just took a screen shot
Ideal range is 172 miles

 

[gregd]

Just took a screen shot
Ideal range is 172 miles

Perfect. Nice battery, perhaps slightly better than average for the age. Mine was there about 3 years ago.