Device Detection Major Update: Tesla Model 3 - 1/9/19

Submitted ticket tonight:
Curious if Sense can detect my Tesla model 3 that I’ve had since August? I charge almost every night on 110V on my garage circuit (same as my detected garage door). I see a 1416W load when I unplug it now.
Tesla version: 2019.40.50.1

I bought our M3 on 12/23/2019 and Sense has yet to identify it. At first we were charging every time we returned. More recently we’ve been charging every couple of days. We use the provided Tesla mobile charger with a NEMA 14-50 plug and outlet. The Tesla typically reports charging at 30 mi/hr (240v @ 32A).

Today a new device was reported (Device 1), typically using 3844w, but spiking to 7760w (for less than a minute) on the power meter at the beginning of each detection. At around the same time ‘Other’ is using about 3600w. Our M3 was charging during this time period. If the M3 is charging at 240v @ 32A that should be about 7200w, right? So is Sense detecting/associating only half of the power the M3 is drawing? Is ‘Device 1’ my M3?

I tried unplugging the M3 to see if I could match it to the new ‘Device 1’, but only ‘Other’ seemed to drop off when I did this. I’ve been all around the house trying to identify another device which could be drawing 3800+ watts, but there is nothing powered on which could draw that amount.

Tesla version: 2019.40.50.7
Sense firmware: 1.24.2555-7798c2d4-master

We have the Sense monitor + solar.

Shortly after the Tesla reported it was done charging, Sense showed ‘Device 1’ was shut off. I’ve tentatively labeled this device as a Tesla Model 3. I will try and monitor this again next time I charge the car and see whether only half the expected power draw is being reported.

Hey @timwood, let us know what you see here moving forward. Charging frequency plays a large part in building out device models for your home - it may take some more time for Sense to have enough data to build a model for your EV.

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@timwood, I have an M3 and have the same result as you are seeing. I am also using a NEMA plug but with the wall charger. Gives 240V @ 40A so 13.6 kwh. The detection has gotten very good at identifying the start but will drop a big chunk of the draw from the Tesla for the remainder of the cycle. I have my charging scheduled in the early mornings on weekdays which makes it very easy to see just how much of my charging is incorrectly placed into the “Other” bucket. @JustinAtSense, feel free to have the data folks take a gander at my data.

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Hi @ptmoore - How long have you been seeing this trend? I would expect this to increase in accuracy as Sense continues to refine the models for your EV in your home. If you’re still seeing this issue, please reach out to us at support@sense.com so we can take a deeper look.

What I described above is still happening. Every time I charge the car. At least it’s consistent.

:man_shrugging:

Hey @timwood. Do you mind if our Data Science takes a look at your home data to get a better idea of what’s happening here?

I didn’t capture the bubbles but here is the hourly views for other and Tesla.

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Hi @JustinAtSense. I don’t mind at all. The Data Science team can have a look at all my Sense home data.

Thanks!

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Thanks for sharing @timwood / @ptmoore. I’ve connected with Data Science and will let you know if we get a better idea of what’s happening here. Appreciate your help!

I’m noticing that a random amount of time before the Tesla is finished charging (tonight it was over 2 hours before the Tesla was finished charging) Sense will report it “turned off” and then all the power the Tesla is using is reported under “Other”.

Tonight Sense detected the Tesla “turned on” at 6:46pm (EST) and then reported t turned off at 8:46pm. The Tesla app reports it still has 1 hr 20 minutes left to charge and it’s still charging.

Thanks for the update here, @timwood. I’ve passed this along to help provide context to the Data Science team on the issues you’re seeing here.

I have some updates that might be helpful.

  1. I now have 2 Model 3s safely charging off one 100 amp sub-panel in my garage, pictured here.
    I took delivery of my 2018 Tesla Model 3 Long Range Dual Motor on Dec 23 2018, it charges daily using our garage’s Wall Connector at 40 amps.
    I took delivery of my 2020 Tesla Model 3 Standard Range Plus on Dec 17 2019, it charges daily using the Mobile Connector (now wall mounted) at 32 amps.
    So this means both cars are charging at once occasionally, and things are more complicated.

  2. From Monday evening on Jan 13 to Thursday morning Jan 16, I had a loaner Tesla Model S in my garage while my Model 3 was being repaired. You may want to ignore that data.

  3. Tesla has released a new Gen 3 Wall Connector, not sure if the charging profile changes at all when this one is in use, but the inter-Wall-Connector WiFi communications to coordinate charging among up to 16 of them could be pretty complicated to detect.

  4. My Sense apparently started picking up my home charging sessions sometime in December 2019, with the TeslaFi.com site keeping track of all my charges, which could help cross-reference what is seen here. I drove 25,000 miles in 2019 alone, so a lot of charging data.

I have now generated a 80 MB PDF copy of all 700 charges I could send your way privately if you want, if that’s helpful. My permission to look at my records was given earlier in this same thread here.

thanks for this, @pbraren. The circumstances you highlighted definitely complicate things a bit. Will pass this along to the DS team in case there’s something here they can utilize.

Thank you!