What you need to charge a Tesla at home
You can charge a Tesla at home using either a standard wall outlet or a dedicated home charging station. A standard 120-volt outlet (the kind you use for lamps and phone chargers) will work, but it adds only 2 to 3 miles of range per hour — so a full charge takes 24 to 48 hours. Most Tesla owners install a Wall Connector, which is Tesla's 240-volt home charging unit. A Wall Connector adds 25 to 30 miles of range per hour, meaning you can fully charge most Tesla models overnight.
You will also need a way to install the charger. If you own your home, you can install a Wall Connector yourself (though a licensed electrician must do the actual wiring). If you rent, you will need your landlord's permission, and some rental agreements prohibit permanent installations. A third option is a third-party 240-volt charger made by companies like Chargepoint or Eaton, which work with Tesla vehicles and sometimes cost less than a Wall Connector.
Key Takeaways
- A standard 120-volt outlet charges slowly (2 to 3 miles per hour) but requires no installation; a 240-volt Wall Connector charges much faster (25 to 30 miles per hour) and requires an electrician.
- Installation of a 240-volt charger typically costs $500 to $2,500 depending on how far your electrical panel is from where you want the charger and whether your home's electrical service needs an upgrade.
- You can use a standard outlet when ready, but most owners find it impractical for daily charging and install a dedicated charger within the first year.
- Renters should ask their landlord before installing anything permanent; some apartment complexes offer shared charging stations instead.
- The cost of electricity to charge a Tesla is typically one-third to one-half the cost of gasoline for the same distance.
Choosing between a Wall Connector and a standard outlet
A standard 120-volt outlet is the cheapest option because you likely already have one in your garage or driveway. You can plug in a Tesla using the Mobile Connector cable that comes with the car. The downside is speed: you will gain only 2 to 3 miles of range per hour, so charging a Model 3 (which has a 50-75 kWh battery depending on the version) takes 20 to 40 hours. If you drive fewer than 30 miles per day, a standard outlet may be enough.
A 240-volt Wall Connector is faster and more convenient. It adds 25 to 30 miles per hour, so a full charge takes 8 to 12 hours — meaning you can charge overnight and start the day with a full battery. Wall Connectors cost between $500 and $750 for the unit itself. Third-party 240-volt chargers (like Chargepoint Home Flex or Eaton) range from $400 to $900 and offer similar charging speeds. The real cost is installation, not the charger itself.
Installation costs and what affects the price
Installing a 240-volt charger requires running a dedicated electrical circuit from your home's main electrical panel to the charger location. A licensed electrician will assess your home and give you a quote. Most installations cost $500 to $2,500, but the price depends on three main factors: how far the charger is from your electrical panel, whether your panel has available capacity, and whether your home's electrical service needs an upgrade.
If your garage is close to your electrical panel and your panel has a free breaker slot, installation is usually on the lower end ($500 to $1,000). If the charger location is far from the panel or your panel is full, the electrician may need to run conduit a long distance or upgrade your service from 100 amps to 200 amps, which can push the cost to $2,000 or more. Ask the electrician for a written estimate before work begins. Some utility companies offer rebates for home charger installation; check your local utility's website to see if you may have access to.
How to find and hire an electrician
You do not need to go through Tesla to install a charger. Any licensed electrician can do the work, and many have experience with home EV charging. Start by asking neighbors or checking online reviews for electricians in your area who mention EV charger installation. You can also contact your local utility company — many have lists of certified installers or can recommend contractors.
Get quotes from at least two electricians before deciding. When you call, tell them the charger model you want (Wall Connector, Chargepoint, or Eaton), where you want it installed, and ask them to visit your home to assess the electrical panel. A site visit usually takes 30 minutes and is often free. The electrician will tell you whether your panel needs an upgrade and give you a firm price. Once you hire someone, the installation typically takes one day.
Electricity costs and how they compare to gasoline
The cost to charge a Tesla depends on your local electricity rate. The U.S. average residential electricity rate is roughly 15 cents per kilowatt-hour, though rates vary widely by state and utility — California and Hawaii are higher, while Louisiana and Oklahoma are lower. A Tesla Model 3 uses about 25 kilowatt-hours to travel 100 miles, so charging costs roughly $3.75 at the national average rate.
For comparison, a gasoline car that gets 25 miles per gallon costs about $12 to $15 per 100 miles at current gas prices. This means charging a Tesla costs roughly one-third as much as driving a gasoline car the same distance. If you charge during off-peak hours (late night or early morning), some utilities offer lower rates, which can cut your charging cost even further. Check your utility's website to see if time-of-use rates are available in your area.
Charging speed and what affects it
Charging speed depends on three things: the charger's power output, the car's onboard charger capacity, and the battery's state of charge. A 120-volt outlet delivers about 1.4 kilowatts; a 240-volt Wall Connector delivers 11.5 kilowatts. However, the car itself limits how fast it can accept power. Most Tesla models can accept 11.5 kilowatts on a 240-volt charger, but older models or those with smaller batteries may accept less.
Battery temperature also matters. A cold battery charges more slowly than a warm one, so charging in winter takes longer than in summer. If you precondition the battery (warm it up using the Tesla app before plugging in), charging speed improves. Most owners find that plugging in when they get home and letting it charge overnight works fine — speed only matters if you need to charge quickly during the day, which is rare for home charging.
Renting and shared charging options
If you rent an apartment or house, installing a permanent charger requires your landlord's written permission. Some landlords allow it; others do not. Before you ask, check your lease to see if it mentions EV charging or electrical modifications. If your lease is silent, send your landlord a written request that includes the cost estimate, the electrician's credentials, and a note that you will restore the property when you move.
If your landlord says no, look for shared charging stations in your area. Many apartment complexes, parking garages, and workplaces have Level 2 chargers (240-volt chargers similar to home Wall Connectors) that you can use for a fee. You can also use public charging networks like Tesla Superchargers for longer trips, though they are more expensive per kilowatt-hour than home charging and are meant for road trips, not daily use. Some employers offer free charging at work, which can reduce your need for home charging.
Frequently Asked Questions
Can I use a regular extension cord with a Tesla charger?
No. The Mobile Connector that comes with a Tesla should be plugged directly into a wall outlet, not through an extension cord. Extension cords can overheat and create a fire risk. If the outlet is far from where you park, have an electrician install an outlet closer to your parking spot instead.
What happens if the power goes out while my Tesla is charging?
Charging stops when ready. When power returns, the car will not automatically resume charging — you will need to unplug and plug back in, or use the Tesla app to restart charging. This is a safety feature to prevent electrical hazards.
Do I need a permit to install a home charger?
Yes, in most places. Your electrician will handle the permit process as part of their job. The permit ensures the work meets electrical code and is inspected by a local official. Permit costs are usually $50 to $200 and are included in the electrician's quote.
Can I charge two Teslas at the same time at home?
Yes, but you need two separate circuits. Installing two Wall Connectors requires running two dedicated lines from your electrical panel, which roughly doubles the installation cost. Some homes do not have enough panel capacity for two 240-volt chargers, so ask an electrician whether your home can support it before buying a second charger.
Is it cheaper to charge at home or at a public charging station?
Home charging is almost always cheaper. Public Level 2 chargers typically cost $1 to $3 per hour or 20 to 40 cents per kilowatt-hour — roughly two to three times the cost of home charging. Tesla Superchargers are faster but cost even more per kilowatt-hour. Home charging is meant for daily use; public chargers are for road trips or when home charging is not available.