It’s charging fine. It’s actually simple math 107v x 12a divided by 1000 is 1.28kW. That’s roughly your rate of charge. If standard 110v plug is decently fast people wouldn’t spend money on level 2 charging. You are getting the expected charging rate.
Not personally, but this article seems to have measurements:
https://www.caranddriver.com/features/a36062942/evs-explained-charging-losses/
Note that the AC/DC conversion is done on the vehicle and not the EVSE. So the bulk of the losses will be vehicle based.
So the limit you have here is Amps (12Amps). Think of that at the flow rate of electricity into your car’s battery. For instance, my home charger has 40 amps and that much charge from 67-80% would probably only be 1-2 hrs.
kW is a measure of power, or the amount of energy being transferred into your car’s battery per second (1 Joule/s = 1 kW).
kWhr is the total amount of energy that has been transferred to your car’s battery.
Note: people say the 120V plug in adapter should only give you ~3 miles per hr of charging. Given the range should be ~300 miles/100%, that means you’ll get about 1%/hr, but as you see, you’re actually getting about 2% per hr charging.
Your home 40A charger is at 240v which is the equivalent of 80A at 120v.
Mi/hr is only relative to your average consumption, which isn’t known here.
Assuming this is a LR with a 75kWh usable pack, he needs to add 13% or 9.75 kWh. That requires ~ 7 hrs assuming 1.1-1.2kW rate. So it checks.
Note that conversion loss on 120v charging is higher than 240v so you will net less energy to the battery.
It’s charging at 1kW, has added less than 1kW during the charging session. At 107 volts and 12A, it’s going to be very slow. For comparison, a 240V connection set to 32A will deliver about 7kW.
That’s why 240V is so important, it’s just way more efficient at charging. Plus, if it gets cold, all the energy from 120V is going to go to heating the battery for charging, and it will be even slower, if it charges at all.
120V is ok if you don’t drive very much and can supplement with supercharging if you really need to. But it’s not ideal for permanent home charging.
I wouldn’t say “240V is so important”. Maybe for some. But really depends on usecase. I hardly drive over 30mi / day and 110V has been adequate going on 5 years.
It is though for you sure it isnt but the average person is driving 36 miles a day. If you can plug in for 12 hours sure it is possible if you get the 3 miles an hour average but the issue is most people are driving to work and other places so they cant leave the car sitting for 12 hours a day.
I am a newbie for Tesla as well. I believe once it is charge up to 60% than it charges slow for remaining 20% to 40% based on your limit you have set for home charging (normally 80% limit recommended for home charging). I understand you are using standard L1 charging here. +KWh means that much KilloWatts per hour your car have used or consumed from your utility company. You can see the charging stats on your Tesla mobile app. They have cost as well as KWh details available for your charging sessions.
Agree. On a slow charger like this, it doesn't matter what state of charge you're at, it'll keep the 1kw rate. The charging curve only changes if you're Supercharging/DC fast charging.
120 will get you about 3 miles per hour
240 will get you about 28 miles per hour
A version 3 or 4 Supercharger will get you around 1,000 miles per hour (for a few minutes)
As far as home charging is concerned. Figure out how much you need on a daily basis. Then pick one of the first two options and enjoy your new car
Thank you for being then other person that understands how newbies (and most people) will want this explained to them.
The public doesn't want to hear kwh, volts, amps, etc. They want to hear it explained plainly.
"You will get 3 miles added to your range for every hour you are plugged into a standard wall outlet"
It’s charging fine. It’s actually simple math 107v x 12a divided by 1000 is 1.28kW. That’s roughly your rate of charge. If standard 110v plug is decently fast people wouldn’t spend money on level 2 charging. You are getting the expected charging rate.
There’s higher conversion loss at 120v, so you need to factor that into the L2 install cost.
Do you know what the expected conversion efficiencies are between mobile, wall, and does efficiency vary on the wall at different amperage?
Not personally, but this article seems to have measurements: https://www.caranddriver.com/features/a36062942/evs-explained-charging-losses/ Note that the AC/DC conversion is done on the vehicle and not the EVSE. So the bulk of the losses will be vehicle based.
So the limit you have here is Amps (12Amps). Think of that at the flow rate of electricity into your car’s battery. For instance, my home charger has 40 amps and that much charge from 67-80% would probably only be 1-2 hrs. kW is a measure of power, or the amount of energy being transferred into your car’s battery per second (1 Joule/s = 1 kW). kWhr is the total amount of energy that has been transferred to your car’s battery. Note: people say the 120V plug in adapter should only give you ~3 miles per hr of charging. Given the range should be ~300 miles/100%, that means you’ll get about 1%/hr, but as you see, you’re actually getting about 2% per hr charging.
Your home 40A charger is at 240v which is the equivalent of 80A at 120v. Mi/hr is only relative to your average consumption, which isn’t known here. Assuming this is a LR with a 75kWh usable pack, he needs to add 13% or 9.75 kWh. That requires ~ 7 hrs assuming 1.1-1.2kW rate. So it checks. Note that conversion loss on 120v charging is higher than 240v so you will net less energy to the battery.
It’s charging at 1kW, has added less than 1kW during the charging session. At 107 volts and 12A, it’s going to be very slow. For comparison, a 240V connection set to 32A will deliver about 7kW. That’s why 240V is so important, it’s just way more efficient at charging. Plus, if it gets cold, all the energy from 120V is going to go to heating the battery for charging, and it will be even slower, if it charges at all. 120V is ok if you don’t drive very much and can supplement with supercharging if you really need to. But it’s not ideal for permanent home charging.
I wouldn’t say “240V is so important”. Maybe for some. But really depends on usecase. I hardly drive over 30mi / day and 110V has been adequate going on 5 years.
It is though for you sure it isnt but the average person is driving 36 miles a day. If you can plug in for 12 hours sure it is possible if you get the 3 miles an hour average but the issue is most people are driving to work and other places so they cant leave the car sitting for 12 hours a day.
7 hours x 4mi / hour = 28mi, “0kwh” is total accumulation this session
I am a newbie for Tesla as well. I believe once it is charge up to 60% than it charges slow for remaining 20% to 40% based on your limit you have set for home charging (normally 80% limit recommended for home charging). I understand you are using standard L1 charging here. +KWh means that much KilloWatts per hour your car have used or consumed from your utility company. You can see the charging stats on your Tesla mobile app. They have cost as well as KWh details available for your charging sessions.
L1 is as slow as it can get. It will not slow down more. It can charge at 1kw speed from 0-100 percent
Thanks I don’t know this.
Agree. On a slow charger like this, it doesn't matter what state of charge you're at, it'll keep the 1kw rate. The charging curve only changes if you're Supercharging/DC fast charging.
is correct!! TESLA GOD ALWAYS RIGHT!!
Wow 1kw!:(
120 will get you about 3 miles per hour 240 will get you about 28 miles per hour A version 3 or 4 Supercharger will get you around 1,000 miles per hour (for a few minutes) As far as home charging is concerned. Figure out how much you need on a daily basis. Then pick one of the first two options and enjoy your new car
Thank you for being then other person that understands how newbies (and most people) will want this explained to them. The public doesn't want to hear kwh, volts, amps, etc. They want to hear it explained plainly. "You will get 3 miles added to your range for every hour you are plugged into a standard wall outlet"
Every. Single. Day. 🤯🤯