110v Charging Max 5-15

[ElectricNerd]

I’ve been getting consistent 4-5 mi/hr charging with the 110v 5-15 charger. The app shows 6mi/hr however. I thought 5 was the max for 5-15? It is using 12a which is to be expected.

 

[jjrandorin]

I’ve been getting consistent 4-5 mi/hr charging with the 110v 5-15 charger. The app shows 6mi/hr however. I thought 5 was the max for 5-15? It is using 12a which is to be expected.

Thats going to depend on what volts you have coming in at your home. Perhaps your home is running a little higher than 120v, like 122 or 123. Check it in the car. Tesla under rates 5-15 charging but its around 5 ish mph.

 

[ElectricNerd]

Thats going to depend on what volts you have coming in at your home. Perhaps your home is running a little higher than 120v, like 122 or 123. Check it in the car. Tesla under rates 5-15 charging but its around 5 ish mph.

Usually the display in the car itself fluctuates between 4 and 5mi/hr.

 

[sightman]

Do you have a SR M3? Otherwise you may have >120 volts. My unloaded power out of outlets are around 123v for example.

If you charge in the cold the number will be lower. As low as 0-3mph.

 

[ElectricNerd]

Do you have a SR M3? Otherwise you may have >120 volts. My unloaded power out of outlets are around 123v for example.

If you charge in the cold the number will be lower. As low as 0-3mph.

Yes, a. 2021 M3 SR+.

Temps have been in the 50s to upper 70s outside the past week.

 

[3sr+buyer]

120V 12A will give you 1.44 kW, so it delivers 1.44 kWh in an hour. Some fraction is lost to charging losses (heat, battery conditioning, etc.), so whatever is left that goes into the battery can be multiplied by your efficiency (miles per kWh) to get how many miles you actually get from an hour of charging.

 

[mister_two]

If you can upgrade that outlet to 5-20 you can gain a bit more miles. After changing the outlet to a 5-20 my SR+ started charging between 7-8 miles per hr.