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Tesla Roadster Survey Form

Tesla Roadster

The purpose of this survey is to allow Tesla Roadster owners to share their experience with battery pack capacity and how it changes over time and distance driven. If you are a Roadster owner, please contribute your experience to the survey by filling in the information below. You are welcome to enter data again as you increase your time and distance.

If you have previously entered a report on this vehicle, use the Roadster Battery Survey Update Report

Before you start, you may want to go collect several bits of information from your car.

  • Current odometer reading
  • VIN sequence number
  • Assembly date
  • Ideal Miles/Km after a Standard and/or Range mode charge

Measuring Battery Capacity

To get a good reading of you battery capacity, you need to read the "Ideal Range" (not Estimated Range) from the charge state screen after waiting at least 10 minutes after the charge has completed. The reason for this is because often the value shown immediately after charging has completed is inaccurate. In the 10 minutes following the end of a charge (or drive) the Roadster takes additional measurements from the battery pack to calculate a more accurate estimate of the pack's stored energy.

Instrument UUID
Instrument Calibration

Instrument Priority:
Instrument Resolution:


State: City: Zip Code

Preferred distance unit:

Your Roadster

roadster model info screen
With the parking brake on, if needed tap the touchscreen to wake it up, then tap "Model Info".
roadster charge info screen
This screen is visible whenever the charge port door is open.

Model Version Year

Sequence number at end of VIN (up to 6 digits): (private)
See photo to the right. This portion of the VIN is required in order to properly identify vehicles and follow-up reports for the same vehicle. It will only be used internally for the survey and will not be disclosed in any reports.

Assembled Date: (mm/dd/yyyy)
See photo to the right.

When did you take delivery? (mm/dd/yyyy)

Odometer at delivery: miles

What was the status of your Roadster when you acquired it?

What is your Roadster ownership status?

Current Odometer: miles

Your Battery Pack and PEM

Battery Pack: Classic (55 kWh)
if your pack has been replaced or upgraded, please note so below

Notes: If you see a range of values, please enter the average or most common value. If you haven't read a value recently, please leave it blank or wait until you've made a reading to submit. If you haven't done a full range mode charge recently, next time you do, you can use the update form to add the range mode number to your report.

Please enter your ideal range after a:
Full Standard Mode Charge: ideal miles
Full Range Mode Charge: ideal miles

Another measure of Roadster battery capacity is called CAC, a value in amp-hours (Ah). Tesla service technicians can read this value from the ESS service screen. We have been told this is the best measure of your battery's capacity. If you have a recent reading of this value, please enter the value.

CAC: Ah (a US-format decimal number like 123.45; leave blank if unknown)

Has your Roadster's battery pack been fully or partially replaced?

Has your Roadster's PEM been replaced?

Has your Roadster's motor been replaced?


How do you most often charge? Volts Amps

How often do you charge in Standard Mode?

How often do you charge in Range Mode?


How do you use your Roadster?

How often do you drive your Roadster?

What is your typical round-trip distance? miles.

About what portion of your driving is on freeways or highways? %.

When driving on the freeway, what is your typical speed? miles per hour.

How often do you get the alert that power has been reduced because the battery state of charge is too low?

How often do you get the alert that power has been reduced because the battery is too hot?

How often do you get the alert that power has been reduced because the PEM is too hot?

How often do you get the alert that power has been reduced because the motor is too hot?

How many times have you driven until the Roadster ran out of power and stopped?

Contact Info

Your contact info will only be used to contact you if we need to follow up on your report and to let you know when we have results to report.

Name: (private)
Email: (private)

The survey takes care to provide some protection of owner privacy by not revealing your name, email or VIN sequence number. However, if you would like to identify yourself, you may enter your TMC Forum username. This name will be revealed with the survey data.

TMC Forum Username: (optional, public)


Note: comments are visible to everyone

(500 characters maximum)

Plug In America

Plug In America depends on a strong community of drivers and supporters to effectively pursue its mission of accelerating the shift to plug-in vehicles.

By choosing the "Yes" option below, you agree to have your name and contact information added to Plug In America's mailing list. This will give you access to Plug In America's free monthly newsletter and email alerts, and will allow Plug In America to invite you to participate in legislative and other consumer-based actions.

Do you give consent for your information to be added to the Plug In America mailing list?

Yes, I'd like to be added to the mailing list. (Recommended)
No, I do not want my information added to the database.

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