One of the biggest points of confusion and apprehension for new and prospective electric vehicle owners is charging. In the US, we have electricity available almost everywhere, but unlike gasoline where most pumps look about the same and take about the same amount of time, electrical connections can vary widely in form and speed. Once you know the lingo, it's really not so bad, so let's break it down.
First, a few definitions:
- kWh – A unit of energy that means how much total range you’ve gotten. It varies with how many kW you’re getting and for how long you charged.
- kW – A unit of power that means how much range you’re getting per hour. It varies with the electrical voltage and current available from the connector.
- Mi/hr – Tesla also likes to specify charging rates in miles of range per hour or mi/hr. This sounds more intuitive than the technical term of kilowatts or kW, but it can also be confusing since it has nothing to do with speed in miles per hour or MPH. It can also be confusing because it’s different for every vehicle. For example, charging a Model 3 at 11.5kW it will show 44 mi/hr on the display, but the same 11.5 kW on a Model X will show 30 mi/hr. The smaller, more efficient Model 3 simply goes farther on the same amount of energy.
- NACS (SAE J3400) – The charge port and plug Tesla designed, now standardized by SAE International as J3400. Most other automakers have switched to it, so NACS chargers are no longer Tesla-only.
As we go through the options from fastest to slowest, remember that these are maximum possible charge specifications and actual charging rates can vary. As your battery fills up or if it's excessively hot or cold, the car will slow charging to protect itself, or if other vehicles are plugged into the same charger it can also slow charging.
Keep in mind that these figures and chargers primarily apply to the US; many other countries use different connectors, voltages, and charging infrastructure.
Level 3 - DC Fast Charging - Charge in Minutes
Tesla Superchargers
Level 3 DC charging bypasses the onboard AC charger and directly charges the battery with DC power. This is the fastest possible charging method and Tesla is constantly pushing the envelope on how fast their batteries can charge. Often, vehicles can be brought up to full charge within an hour, making them the only realistic charging option for long road trips that can’t be made on one charge alone.
- Up to about 1000 mi/hr
- Up to 250 kW for Model 3, Model Y, Model S and Model X
- Up to 325 kW for Cybertruck at V4 Superchargers, with newer V4 cabinets rated up to 500 kW
- Some older Superchargers are limited to 150 kW, and urban Superchargers are limited to 72 kW
Supercharger locations are available on the in-car Tesla display and the vehicle will even automatically route to them when navigating! Many non-Tesla EVs can now Supercharge too, using an adapter or a built-in NACS port.
CCS - Combined Charging System
CCS was the Level 3 DC fast-charging standard most other automakers used through 2023. Nearly all of them have since moved to Tesla's NACS connector, but CCS stations such as Electrify America are still common. CCS connectors resemble a J1772 connector with two large extra pins that can carry up to 350 kW of power directly to the battery on compatible vehicles, though Teslas are limited to 250 kW.
- Up to about 1000 mi/hr
- Up to 500A @ 1000V
- Up to 250 kW through Tesla's adapter (most third-party stations can't deliver that much to a Tesla)
Tesla's CCS Combo 1 Adapter lets you use these third-party stations. It is not compatible with Cybertruck, and some older Teslas need a retrofit to use it.
Level 2 - 240 VAC - Charge in Hours
Mobile Connector with NEMA 14-50 wall plug
Level 2 chargers operate at 240 VAC, but options vary in speed with how much current they can supply. The Tesla Mobile Connector can supply up to 32A when using the NEMA 14-50 adapter on a suitable outlet (a 50A breaker), which is fast enough for most owners' needs.
- Up to 30 mi/hr
- 32A @ 240 VAC
- 7.7 kW
New Teslas no longer come with a Mobile Connector, but Tesla sells it as a low-cost option that includes adapters for both Level 1 (NEMA 5-15) and Level 2 (NEMA 14-50) charging. Other plug adapters are sold separately.
Wall Connector
To reach the maximum at-home charging speeds of your Tesla at 48A, you need a Tesla Wall Connector and a dedicated circuit with a breaker rated at 60A. On a smaller circuit it still works, just slower (for example 32A / 7.7 kW on a 40A breaker).
- Up to 44 mi/hr
- 48A @ 240V
- 11.5 kW
The Wall Connector has the NACS-only connector for all Tesla vehicles.
The Universal Wall Connector adds an integrated J1772 adapter to charge Teslas and vehicles from all other manufacturers in the US.
Destination Chargers
These are often located at places like hotels, wineries, and shopping centers and are intended to be used while traveling, when a vehicle can be left to charge over multiple hours while the occupants are enjoying their destination (hence the name). They are identical to Wall Connectors wired to a home’s electrical panel, though the voltage can vary from up to 277V (really rare) to as low as 208V (pretty common).
- Up to 58 mi/hr
- Up to 80A @ 277 V (older dual-charger S and X at 80A, newer cars are limited to 48A or 32A)
- Up to 22 kW
As part of Tesla's destination charging network, these connectors can show on the Tesla navigation screen if you tap the icon to enable them.
Public Level 2 Chargers
Most Level 2 public charging stations use a J1772 connector, so you'll need Tesla's J1772 adapter. New Teslas no longer include one, so it's worth buying before you need it. As more stations add NACS plugs, you'll increasingly find ones that need no adapter at all. This is useful for a variety of situations when Supercharging, home charging, or destination charging are not available or are inconvenient, but there is ready access to other charging infrastructure. Plugshare is a great resource for locating them.
- Up to 58 mi/hr
- Up to 80A @ 240V (though 32A is most common)
- Up to 19.2 kW
Don’t forget to remove your J1772 adapter from the end of the charging cable when you’re done!
Level 1 - 120 VAC - Charge in Days
Mobile Connector with 120 VAC wall plug
This option uses the standard 3-prong plug that is widely available in the US, but is only realistic if you’re primarily leaving your vehicle plugged in and charging every night, only driving short distances to work and shopping, and using the Supercharger network for longer drives. This method is so slow that it’s known as “trickle charging.”
- About 3-6 mi/hr, depending on the model
- 12A @ 120 VAC on a standard 15A outlet
- About 1.4 kW
Tesla has an excellent, low-cost option that includes adapters for both Level 1 and Level 2 charging.
Tesla Charging FAQ
Can I charge a Tesla from a regular household outlet?
Yes. With the Mobile Connector's NEMA 5-15 adapter, a standard 120V outlet adds about 3-6 miles of range per hour. That covers short daily commutes if you plug in every night, but a 240V outlet or Wall Connector is far more practical.
What's the fastest way to charge a Tesla at home?
A Wall Connector on a dedicated 60A circuit, which delivers up to 48A / 11.5 kW (up to 44 mi/hr on a Model 3).
Can non-Tesla EVs use Superchargers?
Yes, many can. Since NACS became the SAE J3400 standard, most major automakers have added Supercharger access for their EVs, either with an adapter or a built-in NACS port.
