NEMA 14-50 Tesla Charge Rate! [A Comprehensive Guide]

As soon as I had the Tesla charging adapter kit and shortly came to discover the NEMA 14-50 adapter, I got curious about its charge rate. Because fast charging matters!

As Tesla offers Model 3, X, Y, and S, you’ll find different charge rates by using NEMA 14-50 adapter. This happens mostly due to home voltage and connector power. 

  • M3 – 30 miles or 48.2 kilometers per hour.
  • MS – 23 miles or 37 kilometers per hour.
  • MX – 20 miles or 32.2 kilometers per hour.
  • MY – 29 miles or 46.7 kilometers per hour.

After the sneak peek of the NEMA 14-50 Tesla charge rate above, let’s get into detail. 

NEMA 14-50 Tesla Charge Rate! [A Comprehensive Guide]

The NEMA 14-50 Tesla Charge Rate!

With the NEMA 14-50 adapter, each model of Tesla contains a diverse charge rate based on the home supply voltage and wall connector power.

To put it simply, nearly all single-family houses in the USA are fed with 220 – 250 volts if using a 14-50 adapter. However, this might not be the same if you find the commercial areas or apartments as they use 208 volts as home supply voltage.

Apart from this, the wattage of the wall charger can change the charge rate as the Tesla gets less power to get recharged than the rated.  

Fortunately, the Gen 2 NEMA 14-50 adapter offers a clear-cut charge about the max mileage gained per hour of charge. Like: 

Tesla SeriesCharge Rate
Model 330 mi (48.2 km)
Model S23 mi (37 km)
Model Y29 mi (46.7 km)
Model X20 mi (32.2 km)

For Your Information: Tesla to J1772 adapter contains 20 – 25 miles (32.2 – 40.234 km) charging rate which helps the car to fully charge within 10 hours.

Exactly How Fast Does NEMA 14-50 Charge A Tesla!

To know how fast does a 50 amp charge a Tesla using the NEMA 14-50 adapter, you’ll need to calculate based on connector voltage, charging wattage, and battery capacity.

As you are using the NEMA 14-50 adapter to charge the car, know that all connectors for the home charger contain 32 Amps. To put it clearly, Tesla allows using it on a 32A connector even though it is suitable for a 50A connector.

Tesla NEMA 14-50 Gen 2 Mobile Connector Smart Adapter

Be sure to check whether is Tesla home charger worth it or not if you still don’t have it! Coming to the point, you have the 32A connector which is connector power.

Now, find the home supply voltage to the connector which you’ll use to charge the Tesla. It’s mostly 208 – 250 volts so I’m going to count that.

Charging Wattage = (Home Supply Voltage X Connector Power) / 1000

= (208 – 250 volts x 32 amps) / 1000

= 6.7 – 8 kWh

That’s how many kWh does a NEMA 14-50 use if the home voltage is 208V – 250V and the connector power is 32A! After finding the charging wattage, search for your Tesla battery capacity.

In most cases, it is around 50 – 100 kWh based on the model type (including M3, MX, MS, and MY). So, I’ll again use this amount to calculate the charging time.

Charging Time = Battery Capacity / Charging Wattage

= 50 – 100 kWh / 6.7 – 8 kWh

= 7 hours 30 minutes – 12.5 hours (approximately)

Since it’s an imaginary calculation, this will help you understand the process of calculation. This’ll also help you get a slight idea about how fast can the car get recharged on the NEMA 14-50 adapter.

What Is A NEMA 14-50 Charger For Tesla?

It’s a normal adapter, not a charger. The NEMA 14-50 adapter usually has a single phase of around 208 – 250 volts in AC supply with 60 Hertz.

As a universal adapter for charging Tesla, you won’t find this on charging stations. Instead, they contain CCS Combo 1 Adapter. For a better understanding of this, learn whether are Tesla charging stations universal or not!

Here are a few unknown details on NEMA 14-50 given below:

  • Recommended to use a 50A circuit breaker.
  • 32 amps of operating current (maximum continuous current).
  • Fits with 6 AWG copper wires only.
5-15 vs 14-50 Adapter Charging Speed

Ending Note

To understand how fast an adapter helps the wall connector charge the car, it helps when you know the NEMA 14-50 Tesla charge rate.

Just ensure to calculate beforehand by using the given techniques and determine if this kind of adapter is worth-it as your daily-usable option.

I hope you find this guide handy. You should also have good understanding of how to remove a stuck Tesla charger adapter. There are other things to learn as well, do your research.

I will see you again next time!

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