Gen 3 Wall Charger - Can I get data from it?

[IraSch]

I'm looking to try to get power usage data for my Model Y. In particular, KWh usage over time (how much electricity has the car used in a month, year, etc).

I can install a power monitor such as this one from Amazon:

AC 80-260V 100A CRS-022B LCD Display Digital Current Voltage Power Energy Frequency Power Factor Multimeter Ammeter Voltmeter with 100A Split Core Current Transformer

https://www.amazon.com/gp/product/B07K3S4K9L/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

but I can't believe that the wall charger doesn't keep this data already. And since it has Wifi connectivity, maybe there's a way to get this data. Did I miss something along the way?

I did try a forum search but don't really have good keywords to search on.

 

[STDRDC13]

I know you asked if the wall charger keeps the usage data...which i don't know, but the car can give you the info via the trip odometer. But it would require resetting it at the end of the month after the usage was recorded. But yeah, it would be cool if the wall charger data could be downloaded.

 

[P3dStealth]

This is one of the many reasons I like the chargepoint wall charger over the Tesla. I sold my Tesla one on eBay. The chargepoint has an app.

https://www.amazon.com/dp/B07WXZDHGV/ref=cm_sw_r_cp_apa_i_8cUsFbW3MPYDK

You can buy a home energy monitor or that voltage sensor you posted should work ok.

Emporia Energy Smart Home Energy Monitor Devices.

 

[swaltner]

The trip meter is not accurate for total energy consumption. It measures power taken out of the battery when the vehicle is in gear, or at least on. It ignores the overhead for AC to DC conversion during charging, and power used while the car is parked (sentry mode, cabin overheat protection, pre-heating/cooling, ...)

I have an external TED 5000 (The Energy Detective) monitoring the power usage for my home charging. This is similar to the OP's referenced monitor on the first post, but the TED system is embedded in your breaker panel and then generates a web page for the user interface.

I don't use Tesla gear to charge my Model 3, so can't answer the question as to if this is built-in on the latest generation of wall connectors (the wi-fi version).

 

[IraSch]

I bit the bullet and installed the power meter mentioned above.

The meter requires monitoring the voltage to determine wattage so 240V needs to be connected to the meter. I included 1/4 Amp fuses on each leg to be safe.

View media item 121725View media item 121728View media item 121726View media item 121727

 

[CDN-Build]

I bit the bullet and installed the power meter mentioned above.

The meter requires monitoring the voltage to determine wattage so 240V needs to be connected to the meter. I included 1/4 Amp fuses on each leg to be safe.

View media item 121725View media item 121728View media item 121726View media item 121727

Curious how this is working for you.
I also want to monitor the usage so I can tell how much power is used daily, weekly, monthly.
Does the unit you linked to Amazon in your initial thread work well for the above. ?

 

[IraSch]

I've been very happy with it for what it does.

But to be clear, I purchased it from Amazon, it doesn't link to Amazon, Alexa, or anything. I manually read it and log the KWh usage and car mileage. It does include all power usage by the car including any overhead from power conversion that goes into charging the battery. KWh usage is cumulative from installation, but it can easily be reset to zero if you want to.

 

[CDN-Build]

It states it only measures one hot and one neutral. Since the charger uses two hots and no neutral, how did the hook up and monitoring work.
I’m not really familiar with this stuff, so I’m hoping you can help clarify for me.
Thanks

 

[IraSch]

It states it only measures one hot and one neutral. Since the charger uses two hots and no neutral, how did the hook up and monitoring work.
I’m not really familiar with this stuff, so I’m hoping you can help clarify for me.

It only needs power to run the display and as a voltage reference to compute Watts/KW/KWh. It is rated up to 260V, so I connected it between the two hots. It didn't need a neutral. The current sensing coil goes around only 1 of the hot legs.

If you're not familiar with working with electrical power then any electrician should be able to connect this up for you.

 

[kayak1]

I have the following recording my solar production as well as the usage for the cars, heat and hot water:

Energy Metering Systems | eGauge

eGauge home and commercial energy meters connect electricity usage and solar production to the internet for users to monitor in real time. Certified high accuracy (ANSI C12.20 0.5 percent).

www.egauge.net

It provides great data that one can see over time.

 

[gnuarm]

This is one of the many reasons I like the chargepoint wall charger over the Tesla. I sold my Tesla one on eBay. The chargepoint has an app.

https://www.amazon.com/dp/B07WXZDHGV/ref=cm_sw_r_cp_apa_i_8cUsFbW3MPYDK

You can buy a home energy monitor or that voltage sensor you posted should work ok.

Emporia Energy Smart Home Energy Monitor Devices.

Does the app let the EVSE talk directly to your phone/computer or does it have to go through a web server? They say the app can set charging times, can multiple times during the day be set? My ToU is peak in both morning and afternoon most of the year, then in four months it changes to one longer period in the afternoon. Will the app automatically adjust for this schedule? They also eliminate peak times on holidays, can it do that?

Holy crap! I just looked at the price, $1,528!!! Aren't these things usually around $500?

 

[gnuarm]

It states it only measures one hot and one neutral. Since the charger uses two hots and no neutral, how did the hook up and monitoring work.
I’m not really familiar with this stuff, so I’m hoping you can help clarify for me.
Thanks

The current flowing to the car is on both hot wires to complete the circuit. The current is the same in each wire, just the opposite direction. So you only need to measure one wire to get an accurate reading. The charger actually measures both wires for the safety circuit, but it's a subtractive measurement., Since the current in the two wires should be equal, if they are not equal to within a very few milliamps the power is cut.

The charger may measure the actual current flowing so it can report that, the normal operation of the charger does not require a current or power measurement. The charger tells the car the maximum current it can supply and the car has the responsibility of respecting that and not drawing more.

 

[CDN-Build]

It only needs power to run the display and as a voltage reference to compute Watts/KW/KWh. It is rated up to 260V, so I connected it between the two hots. It didn't need a neutral. The current sensing coil goes around only 1 of the hot legs.

If you're not familiar with working with electrical power then any electrician should be able to connect this up for you.

Thanks.
So I have a further question about the voltage reference.
So my charger runs off of 240 volts and a 50 amp breaker. I’m hooking this up to the panel.

So can this unit be wired into any two breakers, as long as one is X and one is Y, grabbing 240volts ?
Thanks

 

[IraSch]

Thanks.
So I have a further question about the voltage reference.
So my charger runs off of 240 volts and a 50 amp breaker. I’m hooking this up to the panel.

So can this unit be wired into any two breakers, as long as one is X and one is Y, grabbing 240volts ?
Thanks

You need a dedicated 2-pole breaker. It will automatically grab both sides of the 240V supply. Do not attempt to use individual breakers. It would also not be a good idea to piggy-back off an existing 2-pole breaker such as an electric range.

If you're not familiar with working with electrical power then don't chance it. Mistakes in a panel and/or with 240V don't usually let you have a second chance.

 

[gnuarm]

Thanks.
So I have a further question about the voltage reference.
So my charger runs off of 240 volts and a 50 amp breaker. I’m hooking this up to the panel.

So can this unit be wired into any two breakers, as long as one is X and one is Y, grabbing 240volts ?
Thanks

What Ira said... The panel is made with a couple of strips running up and down with one side of the 240V on each rail. The breaker connects to one rail or the other for 120V. For 240V they have two breakers with a connection between the handles that connects one to each rail. To add a new circuit you need to add a new breaker.

Just in case you are not aware, a 50 amp circuit lets your car charge at 40 amps since such a use requires the current be derated to 80%. If you use a standard mobile cable with a 14-50 outlet it can be on either a 50 amp circuit or a 40 amp circuit, so the second generation cable that cars have come with for a number of years now will only charge at 32 amps. If you are installing a HPWC it can be set for the 50 amp capacity and allow 40 amp charging.

When I first got my car I wanted to get the fastest charging I could get thinking it was important... 72 amps. But I'm very good at procrastinating and put it off long enough that I think the HPWC they now sell won't supply that current. In the meantime I've come to realize my particular situation allow me to charge from a 120V level 1 outlet and do everything I want to do! Certainly that's not for everyone, only charging some 40 miles over night (depending on the length of the night . But pretty much any 240V charging will do the job for 99.9% of people/situations. Even a 3 Tesla family should be pretty happy with a single HPWC or NEMA 14-50 outlet, as long as they don't have any charger hogs. Keeping a Tesla charged is not that big of a deal. That said, never leave home without your charging cable. That's another story...

 

[davidand]

I am also curious if I can get consumption data via the web interface of the Gen 3 Wall Connector? Anyone would be willing to share screenshots?

 

[Rocky_H]

I am also curious if I can get consumption data via the web interface of the Gen 3 Wall Connector?

Really? You added a new comment to this thread without apparently reading the previous comments that already explained that the wall connector doesn't have that capability?

 

[johnr]

In the manual for the Gen 3 wall connector, Tesla says "Connecting Wall Connector to a local Wi-Fi network enables it to receive over-the-air firmware updates, remote diagnostics access, and usage data tracking capability." This statement is found on page 7 of the manual, available here: https://www.tesla.com/sites/default...ng/Gen3_WallConnector_Installation_Manual.pdf

If I'm understanding that statement correctly, the wall connector is indeed tracking usage data and transmitting it over wifi. Presumably Tesla has access to the data from these devices. However I could find no information on how I can view that data. Maybe they're just keeping the data to themselves for the time being. I'm planning to install a wall connector at my business for visitors to use, and it would be very helpful to have some aggregate insight into what times people are charging and for how long. I'm surprised nobody has any information about how to access that data from the wall connector since it's already tracking the data.

 

[Rocky_H]

In the manual for the Gen 3 wall connector, Tesla says

Welllll, that's the first mistake: believing what is in the Gen 3 wall connector manual. The manual also said it could do sharing between up to 16 (!) of those wall connectors! That was a blatant lie. When it came out, it couldn't do any sharing at all. It took well over a year to implement any kind of sharing, and then it was only up to 4 of them. So the manual for it really badly misrepresented the capabilities. It was falsely representing a lot of things that they plan to do at some unknown point in the future as if it were already available, which was a great disservice to everyone.

If I'm understanding that statement correctly, the wall connector is indeed tracking usage data and transmitting it over wifi.

Pretty certainly not happening yet.

I'm surprised nobody has any information about how to access that data from the wall connector since it's already tracking the data.

It's not happening, so not surprising.

 

[sorbl]

Welllll, that's the first mistake: believing what is in the Gen 3 wall connector manual. The manual also said it could do sharing between up to 16 (!) of those wall connectors! That was a blatant lie. When it came out, it couldn't do any sharing at all. It took well over a year to implement any kind of sharing, and then it was only up to 4 of them. So the manual for it really badly misrepresented the capabilities. It was falsely representing a lot of things that they plan to do at some unknown point in the future as if it were already available, which was a great disservice to everyone.


Pretty certainly not happening yet.

It's not happening, so not surprising.

http://wall.connector.uri/api/1/lifetime :

contactor_cycles	318
contactor_cycles_loaded	1
alert_count	11
thermal_foldbacks	0
avg_startup_temp	30.3
charge_starts	318
energy_wh	988965
connector_cycles	153
uptime_s	20282620
charging_time_s	319161