A logbook for your electric cars.
Look up a drive, a charge or a night parked long after you have forgotten it. EV Logger follows your Tesla or Rivian day and night and writes down what the car reports. The record stays in your account for as long as the account exists.
Why keep a logbook
At any moment an electric car can report a great deal about itself, such as where it is, how full its battery is, how much energy the last miles took, and whether it is charging and how fast. A moment later it reports something new.
EV Logger records each of those moments as the car reports it and keeps them in order. So when you have a question, the history is already there.
- How did actual range change over time?
- How much battery does the car use on a night parked, and was last night different from other nights? How much charge does it need to sit in the garage for the next 7 days?
- I visited my friends a few months ago, but what day was it exactly? If I go there again, how much should I charge?
- Is the battery holding up?
- Did the car arrive with the charge its navigation planned?
A logbook answers questions like these from your own car’s history.
What it keeps
Drives
Every drive is kept with its route on a map, where it began and ended, its distance and time, and the energy it took. A drive opens into a timeline that starts before you set off and ends after you park. It shows a charge just before or after the drive, the stops along the way, and the doors, locks and climate.
Charts show speed, battery and temperatures along the way. A Rivian also shows elevation. For a Tesla, EV Logger estimates the climbs from the slope of the road. If you used the car’s navigation, you can compare the charge the car expected to arrive with and the charge you actually arrived with. Drives with only a short stop between them can be joined into one trip.
Charging
Each charge is kept as a session with when and where it happened, how much energy went in, the charge level before and after, the power along the way, and whether it was an AC charger (L1 or L2) or a DC fast charger.
Over the months the charging statistics show how often you charge, how much of it happens at home, and at what times of day.
Parked and asleep
A parked electric car still uses a little energy, and more on some nights than others. EV Logger records every stop and every time the car slept. For each one, it shows where it happened and how much charge the car lost. If the car was plugged in, it shows how much charge it gained.
The sleep statistics show what a typical night costs and which sleeps were the longest.
The battery over time
Battery health compares your car’s range on a full charge today with the best full-charge range EV Logger has logged for it. The rated range is shown next to it, and you can follow the figure month by month. You also see your charging cycles, how much energy you have put in overall, and how full you usually charge.
Efficiency
EV Logger shows how much energy the car uses per mile or kilometre, for each drive and over time. It breaks this down by temperature, speed and season. It also shows the energy used for driving apart from the energy the car used while standing still.
Software updates
EV Logger keeps every software update. For each one, you see when it arrived and how long it took to install. You also see the battery level when the update was offered and when it was installed. While an update is installing, you can watch its progress.
Places
You can name places like Home or Work and set how large each one is. Drives and stops then show your names instead of an address. A single stop can be renamed on its own. The map shows where the car is, or was last, and where its navigation is heading.
Both makers in one account
EV Logger works with both. One account can hold several cars, Tesla and Rivian together.
Most of what it keeps is the same for both makers. Where a car reports more, EV Logger keeps more, such as a Tesla’s regeneration along a drive or the charging power a Rivian measures itself.
From day to day
You connect a car once, by signing in to its maker’s account from EV Logger.
A Tesla connects through Tesla’s Fleet API. You sign in on Tesla’s own page, allow EV Logger to read the car’s data and location, and approve EV Logger for the car in the Tesla app. Your Tesla password never reaches EV Logger. A Rivian signs in with its email and password, plus the code Rivian sends if the account asks for one. The password is not stored. Only the signed-in session is.
After that, you have nothing to start or stop. EV Logger uses that sign-in to read the car’s data from Tesla or Rivian, and it records the data by itself. Drives, charges and nights parked appear in your account without you doing anything. If the sign-in ever expires, EV Logger marks the car as needing a new sign-in. Then you sign in again.
EV Logger only reads. A Tesla sends its data through Tesla’s Fleet API while the car is awake, so EV Logger never has to wake it. EV Logger never sends the car a command. It does not wake or unlock the car, drive it or change its settings.
You read it all in a browser, on a computer or a phone. There is nothing to install in the car.
Your data
Only you can see your car’s data, when you are signed in to your account. If you invite one person to share it, they see only the cars you choose. Other EV Logger users never see it.
It is kept in the United States. It is not sold, and there is no advertising. The Privacy Notice says what is kept, for how long, who helps run the service, and when the operator may look at an account.
You can take your data with you at any time. Save a backup to a file and load it back later, all cars at once or one car at a time. You can also bring in a Tesla’s history from TeslaMate. If you leave, deleting your account deletes your data too.
Who makes it
EV Logger is made by Flying Blue Doxie. It is an independent project, not affiliated with Tesla or Rivian. Questions, ideas and problems go to [email protected], where a person reads every message.