Formula For Calculating The Charging Speed Of The Tesla
There is a simplified formula by which you can calculate the speed of the charging process of an electric car:
Duration = Auto battery capacity x 1000 / EVSE power x 1000.
For example, with a Tesla battery capacity of 82 kWh and a charging power of 6.5 kW, the car will need the following charging time:
Duration = 82000/6500 = 12.6 hours.
These are approximate figures, and for more accurate results you need to use a calculator. This tool is sure to take into account the 10% loss of energy as well as the characteristics of the built-in charging unit.
How Do You Charge A Tesla
There are four options for charging:
Regardless of the charging method you use, you simply plug into the Tesla charging port and charging will start automatically.
How To Charge A Tesla At Home
Level 1 charging stations can be plugged straight into a standard 120V outlet in your home or garage. While Level 1 systems have the ability to get the job done, they are the least efficient way to charge your EV and can take as long as 3 days to fully charge a Tesla. This painfully slow charging rate often leads a Tesla vehicle owner to depend on the Tesla public charging Supercharger network or install a home EV charger of their own.
The second home charging option for a Tesla EV driver is a Level 2 charging station that puts out the recommended 240 volts that are needed to charge your Tesla. Level 2 charging systems plug into a dedicated 50 amp circuit that may require professional electrical installation. With significantly more power than a level one charging station, Level 2 chargers can charge your Tesla roughly 6 times faster. The maximum rate at which a Tesla can charge is between 7.2kW-11.5 kW, depending on the Tesla model. So how many kWh to charge a Tesla exactly? Teslas have a battery capacity ranging from 50 kWh on the standard range Model 3 to a whopping 100 kWh that powers all Model S and Model X packages.
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Tesla Battery Size & Types Of Chargers
The Model S, Teslas flagship vehicle, is offered in several different models with varying battery capacity, power , and charging speed. The Long Range 2019 Model S has a range of 370 miles, which is the longest electric range of any car on the road today. The Model S has a 100 kWh battery and can be charged with a variety of EV chargers. Electric vehicles can be charged with a 120-volt Level 1 charger or a 240-volt Level 2 charger as well as DCFC stations.
How Fast Does A Supercharger Charge A Tesla

The most frequent question for electric vehicle owners is How long does it take to charge? In a previous post titled The Reality of Charging an EV on the Road, I discussed the three categories of charging .
As a Tesla owner, the next set of questions almost always have to do with Supercharging. While I talked a lot about where to find Superchargers and generally how they work in the previous post, I only touched briefly on the factors affecting charging speed. I said:
L3: fast charging is typically 50 kW or greater. Teslas superchargers are capable of about 120 kW at peak rates. With L3 charging, a 60 kWh battery can be fully charged in an hour or so. A special note: L3 chargers adjust their power levels based on temperature, battery capacity, battery state of charge, and other factors to protect the battery. L3 chargers provide peak power when the battery is warm and nearly empty. Charging at L3 rates is an intricate dance between the electrical grid, car, and charger.
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As a general rule of thumb about how long it takes to charge on a Supercharger, think of it like this:- 2030 minutes to go from 20% battery remaining to 80% full. – 60 minutes to go from 20% battery remaining to 95%.- 90 minutes to go from 20% battery remaining to 100%.
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Find Free And Affordable Charging Where You Need It With The Chargepoint App
Tens of thousands of Tesla Model S and Model X drivers already use the ChargePoint app to find stations and charge up, whether its Level 2 or DC fast charging at ChargePoint or Tesla stations.
Tesla drivers have charged on ChargePoint more than 1.4 million times.*
Tesla drivers have travelled 63 million miles on ChargePoint,enough to get to Mars.**
I’ve found that people sometimes think there arent many public charging spots near them, because charging stations arent always as obvious as gas stations. When that happens, I just show people our mobile app and they’re usually surprised by how many charging stations they can find nearby: there are over 38,000 places to charge on the ChargePoint network, as well as thousands more Tesla Superchargers and destination chargers. If you dont see many stations near you, ask your favorite restaurants or stores to add charging.
Note that each ChargePoint station owner sets the price for charging, so check pricing on the station or in the ChargePoint app before you plug in. Its easy to find free ChargePoint stations near you by filtering in the app. More than 80% of Tesla Model S charging sessions on ChargePoint have been totally free.
Based on our data, heres what Tesla Model S drivers have been paying to add about 50 miles of range on ChargePoint:
Whats The Fastest Way To Charge A Tesla At Home
Teslaâs optional âWall Connectorâ unit is by far the fastest way to charge your Tesla at home, and it comes at an additional expense and requires professional installation. That said, itâs so much faster than standard charging plugs that itâs more than worth it for many people.
The Wall Connector is a compact unit with a Tesla connector hanging from it. The housing mounts on the wall and is wired into the home power, and the extension cable is of sufficient gauge for constant use.
The Tesla Wall Connector can add a maximum of 44 miles of range per hour at peak efficiencyâand itâs much more efficient than standard wall charging, especially if youâre not using the right kind of cords.
The Tesla Wall Connector works for the Model S, the Model 4, the Model 3, and the Model X. The Model S can gain 34 miles of range per hour, the Model Y can gain 42 miles of range per hour, and the model 3 can gain a maximum of 44 miles of range per hour.
Itâs worth noting that a Wall Connector has a maximum charge rate of 32 amps for the standard range Model 3, which is 30 miles of range per hour of charging.
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First An Ev Charger Can Refer To Two Different Things
- Internal or On-Board ChargerThe on-board charger is a component inside the car. The OBC manages internal power flow to safely charge your EV battery.
- External Charger or EVSEThe box-and-cord device has a technical name. Electric vehicle supply equipment, or EVSE. The EVSE delivers power from the grid to your EVs on-board charger in the first place. Still, everyone tends to call the EVSE a charger. So will I for the rest of this post.
What About A Tesla Supercharger
Today, Tesla has more than 12,000 Superchargers across North America, Europe, and Asia. In March, Tesla unveiled its V3 Supercharging, which enables Tesla electric vehicles to charge faster than any other electric vehicle on the market today. For example, a 2019 Model 3 Long Range vehicle operating at peak efficiency can recover up to 75 miles of charge in 5 minutes when using their electric vehicle charging stations and charge at rates of up to 1,000 miles per hour. It also introduced a new feature called On-Route Battery Warmup, which allows your car to intelligently heat the battery when approaching a Tesla Supercharger in order to ensure its EV drivers charge at the optimal temperature and ultimately reduce average charge times for owners by 25 percent.
Other Tesla Supercharging stations charge with up to 150 kW of power distributed between two cars with a maximum of 150 kW per car, depending on the version. These electric vehicle charging stations take about 20 minutes to charge to 50%, 40 minutes to charge to 80%, and 75 minutes to 100% on the original 85 kWh Model S.
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How Much Does It Cost To Charge A Tesla
Electric cars offer significant fuel savings on a day-to-day basis thanks to their efficient use of electricity as fuel. The cost to fully charge a Tesla depends on the car you have and where you live, because electricity prices vary from utility to utility and from state to state. The price to fill up a Tesla Model S battery at home ranges from $6.60 to just over $21.00 . For a Tesla Model X, prices will range from $6.70 to nearly $22.00 .
To learn all about how much it costs to charge a Tesla, read our blog post about costs by model and more.
Is It Free To Charge A Tesla At A Charging Station
No, it isnt free to charge a Tesla at a charging station. Charging your Tesla at a Supercharger comes with a price, typically around 26 cents per kWh. This is often more expensive than using a different means of charging, such as a 120-volt or 240-volt outlet. Free supercharging was once available on new Tesla vehicles, but the practice was discontinued in recent years.
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Where To Charge Tesla
There are four options for charging:
Regardless of the charging method you use, you simply plug into the Tesla charging port and charging will start automatically.
Additional Costs That Surprise Tesla Owners

The cost of using a Tesla isnt all about charging your car at home. Fuel costs are one consideration to keep in mind when comparing the math of using a traditional car and using a Tesla, but you should also research the additional costs that Tesla owners might have.
Heres a look at a few extra expenses you might not have thought about:
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How Long To Charge A Tesla
Without a doubt, it will never take more than eight days to fully charge your car, regardless of your charger. However, few people will discharge their Teslas battery to zero. Besides, its unlikely that youll ever charge your vehicle for the entire eight days. Whats more, depending on the charger they choose and how much their battery is already charged, charging a Tesla can take anywhere from one to twelve hours for most people.
Although it takes a bit longer than filling up at the gas station, charging an electric vehicle is less expensive than buying gas in all 50 states. Emphatically this means that Tesla will save you money in the long term despite their high initial cost. Additionally, putting solar panels on your roof will make it cheaper for charging your Tesla. As a matter of fact, an overnight charge will nearly always get your Tesla exactly where you want it to be. Basically, you can rest easy knowing that your Tesla will get you where you want to go the following day.
Getting The Most Out Of Your Tesla Batterys Charge
All of the numbers weve listed are just averages based on the standard models and stats gathered throughout the life of Tesla vehicles. However, many things can affect how long it takes to charge and how efficient your vehicle stays. There are some tips that Tesla owners can follow to help extend the life of their battery and ensure its running at its most efficient level.
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How Much Does It Cost To Charge A Tesla At Home
If you charge at home, the local cost of electricity will determine your overall charging cost. The average utility rate in the US was about 13.72 cents per kWh as of March 2022.
To calculate the home charging cost, multiply the capacity of your battery by your utility’s cost per kWh.
For example:
- Electricity rate = $0.1372 per kWh
- Charging cost = 75 times $0.1372 = $10.29 for a near-empty battery fill-up.
How Can I Charge My Tesla At Home
There are two main options for charging up your vehicle at home. With a Level 1 charging station that is plugged into a standard 120V outlet in your home or garage charging up the vehicle could take up to 3 days! While this might be sufficient for some people who do not regularly need to drive, the majority of people who drive to and from work every day would need a different solution.
The second option for home charging is a Level 2 charging station that puts out 240 volts. Level 2 systems offer significantly more power than a level 1 charger. Level 2 chargers have the ability to charge a Tesla 6 times faster than a Level 1 charger.
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How Long Does It Take To Charge A Tesla On 240v
Level 2 AC chargers are commonly found in your home to charge large appliances like dryers or fridge/freezers, or garages. They do often need to be installed by a professional electrician but it is a fairly easy process.
Level 2 AC chargers are the most common type of charge found in Destination Charging locations, although DC fast chargers are becoming increasingly common.
At home, Level 2 240V plugs offer approximately 40 amps but it is possible for them to go as high as 80. You can expect your Tesla vehicle to take between eight and 12 hours to reach fully charged.
Power Strips And Extension Cords
Youâll need to use an extension cord with the right wire gauge to charge a Tesla from the wallâdonât bother with thin cheap hardware store cords.
Extension cords arenât really regulated much in the United States. This is interesting, as extension cords are a common source of overheating problems and electrical cords.
Tesla wants you to think of power like water, in the sense that large pipes enhance flow rates while small pipes restrict it. But hereâs a big differenceâsmall gauge cords, when subjected to excessive power load, get extremely hot.
Additionally, they cause resistance which reduces the speed at which your Tesla charges. Thatâs why itâs essential to read the label and find a cord with the proper wire gauge for charging your Tesla.
In the United States, the color or shape of an extension cord denotes nothing. Many âheavy-dutyâ orange or green cordsâlike the ones you see at concerts and on construction sitesâare actually the same as the thin white ones, and the gauge is too thin for charging a Tesla.
Wire gauge values are inverse to wire thickness. That means 18 gauge is thinner than 14 gauge, which is thinner than 12 gauge, and so on. Next, weâll cover the wire gauge you should look for when choosing an extension cord for charging your Tesla.
If youâre charging with a 15 amp current, use a ten or 12-gauge extension cord. For more powerful 20 amp charging, use a 10-gauge cord or heavier.
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How Long Does It Take To Fully Charge The Tesla Model Y Standard Range
- If you charge it from a regular NEMA 5-15 socket, it will take 30 h 52 min to charge it 0-100%
- If you charge it from a NEMA 14-50 socket, it will take 7 h 14 min to charge it 0-100%
- If you charge it at a Tesla Supercharger or any other DC charging station, the cars battery can accept up to 150 kW of power. However, the average charging rate will be lowered to extend the battery life. Whats more, not all stations are capable of generating such power. In the best case scenario you will be able to charge your Tesla Model Y Standard Range 0-100% in 50 minutes.