The use of electric vehicles is no longer limited, and already their share is 25% of new sales in the global automotive market. In the USA, most owners choose to install a charger in their homes, which makes the use of EVs even more convenient. But some difficulties come when a family owns two electric cars—it is likely that there is often a need to charge two cars at the same time.

Read this article to find out more about some ways to charge two electric cars at home. We will analyze the advantages, disadvantages and relevance of each method so you can determine which one will be best in your case. We also will take a look at the best EV chargers in North America.

You can charge two EVs at once by using one of the following methods:

Now let’s go over each option in more detail.

Here are several of the best models of EV dual chargers:

EV Adept’s customers who own two electric automobiles frequently purchase the following charging equipment:

  • ClipperCreek HCS-40 Dual. This Level2 station can be installed into a single 40-amp circuit.
    Where to buy? Amazon or ClipperCreek’s site
  • Grizzl-E Duo. The device provides up to 10 kW of power to one electric car and features dynamic power-sharing.
    Where to buy? Amazon or Grizzl-E’s site
  • EV40D Dual EV Charger. The station splits up to 16 amps of electricity for each electric vehicle.Where to buy? Manufacturer’s website

Option 1: Dual Charging Station

If your family has two electric cars, then one of the best options for simultaneous charging would be to get a dual charging station1. It is hooked up to a single circuit and comes with two cables and two chargers in a one box. Installing this kind of device could expand the capacity of a limited electrical setup without investing more in a new circuit or service panel, which allows for additional charging of electric vehicles.

A dual charger is a Level2 hard-wired device that splits electricity between two cars, so while charging, each car gets half the power2. This option is great if you charge cars overnight, as both can be fully charged in that time. If you charge only one car, then 20–30 miles of range will be added per hour.

When selecting a dual charger, you need to remember the 80% rule. The maximum amperage of the device should not exceed 80% of the circuit amperage so as not to overload it. For instance, a 32-amp station should be connected to a 40-amp breaker. As for the choice of location, make sure it is close to an electrical outlet and does not pose a safety hazard. Also take into account that the dual station must be in a place where the cables can connect to both electric cars at the same time. A qualified electrician will take this into account and, if necessary, install a circuit breaker with a higher electric capacity.

Most dual-socket points charge any EV using the universal J1772 connector, so, in most cases, compatibility won’t be an issue. If you have a Tesla, you need to use a special adapter to charge the car.

Comparison chart of dual home EVSEs

Grizzl-E Duo Level 2 Dual EV Charger (240 Volt, 24ft Cable,...ClipperCreek HCS-D40 Level 2 Dual Hardwired Electric Vehicl...ClipperCreek HCS-D50P Level 2 Dual Electric Vehicle (EV) Ch...ClipperCreek HCS-D50 Level 2 Dual Hardwired Electric Vehicl...
OverviewThe dual port EVSE designed to charge two electric vehicles at the same time. Intelligent power-sharing to maximize available current. Provides up to 10kw to 1 vehicle. IP67 Water-resistant.32Amp hardwired EVSE, which is fine for 2 cars if you're not in a hurryCharger with 2 plugs for 2 EVs. Connected to a 240-v socket, the charger will deliver a total of up to 9.6kW.Hardwired EVSE that requires professional installation. It is a good power source for 2 cars.
BrandGrizzl-EClipperCreekClipperCreekClipperCreek
Amperage40324040
Voltage240240240240
Cable length, ft24252525
HardwiredNoYesYes
Level2222
Phase1
PlugJ1772J1772J1772J1772
SocketNEMA 14-50NEMA 14-50
Wall/StandWall
Weight49.9
Working temperature-22F to 122F-22°F to 122°F
Warranty3-year warranty3-year warranty3-year warranty3-year warranty
CertificateUl certifiedETL, cETLus, ENERGY STARETL, cETLus, ENERGY STARETL, cETLus, ENERGY STAR

Option 2: Two Chargers Connected to One Circuit

Another solution to charge two cars simultaneously is to buy two stations that support load balancing3 and install them on a single circuit. 

The maximum power of the electrical grid is determined by some models automatically and quite accurately. In other models of dual EV chargers, the particularities of the electric network are set when using the mobile app for the first time. In any case, this process for the user is not difficult.

It provides more flexibility with the installation but in comparison with the previous method, it is much more expensive. The cost consists of the price of two charging stations and the cost of installing one more 240-volt outlet. In addition, it requires more complex wiring work.

To charge two EVs, you can purchase two typical 32A/7kW units and set them both up on a single 40-amp circuit. During simultaneous charging, the amperage will be reduced—these devices will share power and won’t overload the circuit. Charging time will be longer, and both cars take twice as long to charge, at least until one vehicle has finished charging. If just one EV is charging, it will get full power.

Of course, having two stations in the house has its benefits, but this will only make sense if installing a dual home station is not possible. Considering the fact that the charging time is longer, it will take from 8 to 12 hours to charge the electric vehicle, depending on battery capacity. On average, with 3 kW of power, around 10–14 miles of range per hour will be added.

The most popular chargers with load balancing include:

  • Tesla Wall Connector. This is a hardwired 48-amp station that charges 11.5 kW. The device can charge an EV from any other brand by using the Tesla to J1772 adapter.
  • Enel X JuiceBox EV Smart Charger. This device supports load balancing and is available in several amp versions. It can charge a Tesla with a Tesla to J1772 adapter.

Option 3: Two Chargers Connected to Separate Circuit Breakers

If you often have to charge your electric cars at home, connecting separate charging stations to different circuit breakers might be the best option. The main advantage is that no matter how many cars are charging at the same time, the EVs will receive maximum power. Accordingly, the charge time for each vehicle will be only about 4–6 hours. But this is the most expensive option since, in addition to the costs of stations, you need to purchase circuit breakers and hire an electrician.

For maximum charging speed, each station is connected to a separate circuit breaker. This device protects equipment from aggressive temperatures and destruction in the case of a short circuit. The 30-amp point will require a 40-amp circuit breaker to be installed.

Installing separate charging stations requires some knowledge of home wiring and charge points installation. If you are not a qualified electrician, it is better to entrust this work to professionals.

There are the best home stations:

  • ChargePoint Home Flex. This compact 50-amp station is available in plug-in or hardwired form. It connects to WiFi and has various extra features.
  • Pulsar Plus from Wallbox. 40-amp station with smart functions like Google Home & Alexa. It is available in different connection types.
  • EVoCharge EVSE. This 32-amp device charges for an additional estimated 25–35 miles of range per hour.

Option 4: A Level2 Charging Station and a Level1 charger supplied with the EV

If you don’t want to spend the money to buy several charging stations or a dual device, then the best option is to install just one Level-2 station and use a standard Level-1 charger.

The Level-1 device is the simplest type because it uses a basic home electrical current and plugs into a standard grounded outlet. It doesn’t require any special equipment for use—just take the cord and plug it into the outlet and the car. You don’t even need to buy it, as automakers provide a kit when you buy a car (there are exceptions, like owners of a Tesla or KIA EV6). So, the main advantage is cost savings because you do not need to spend money to buy an additional station and circuit breaker.

This option is great if one of the cars is a hybrid or its battery has a relatively small capacity. What’s more, on days when your family doesn’t need to drive much, you can just switch out the Level-2 charging point between both electric cars.

Speaking about the charging time, the usual Level-2 device has a power of 7.2 kW, which allows you to fully charge 100% of the electric car in 4–7 hours. If you have a terminal of 3.6 kW, then the car will charge two times longer. A Level-1 charger has a power of 1.4–1.9 kW, and a full charge of an empty EV battery can take around 24–35 hours. The device adds from four to six miles of battery range for every hour of charging.

If you have Tesla, there’s a hack: as every car comes with a Tesla mobile charger, you don’t need to install one more Level-2 device at all. Just buy a 240-volt NEMA 14-50 adapter for about $40, and the charger will be able to deliver up to 32 amps.

While a lot of stations are designed to be permanently installed in the garage or outside the home, it might be a good idea to choose a plug-in model. The installation cost is about the same, but having a portable terminal means that you can easily take it with you and plug it into the 240V circuit.

The best models of portable chargers include:

  • Mustart TravelMaster. The device with the ability to connect to 120-v and 240-v. Also popular for travel.
  • MEGEAR Skysword. NEMA 5-15 and 6-20 charger. Its affordable price made it the top seller in its class.
  • BougeRV Level 2 Portable Electric Car Charger. The device delivers up to 32 amps and has an IP67 waterproof rating.

A Final Note

We have considered all the options to charge two electric cars at the same time at home, and depending on your budget and needs, you can choose the most suitable. The cheapest option would be to install a Level-2 EVSE and use a Level-1 charger. If your family drives far or often, then you can also consider the installation of two chargers connected to different circuit breakers, which will help to minimize the charging time of cars. In most cases, the best option would be to buy a dual EV charging station or installation of two devices connected to one circuit.

Mike Becker
About Mike Becker Linked In
Mike is a seasoned engineer with 10+ years of experience in charging systems. He bought a Tesla Model S in 2014 and has been in love with EVs ever since. He runs a small EVSE installation business in Florida and blogs about what he loves.

FAQ

What is a dual EV charger?

A 32-80 Amp Level-2 plug-in or hardwired station, which can charge two electric cars with one station on a shared circuit. We’ve reviewed the top dual chargers and selected our top choices.

Are you able to charge two EVs simultaneously?

Buy a Dual Charger. It divides the electricity between the two EVs. Each receives up to 20 Amps while charging at once, and 40 Amps for charging one vehicle. We’ve compared and shown you the best chargers for 2 EVs.

How can you charge two electric cars at once?

Some new EVs now come standard with 240-volt portable charger. You can also install two outlets (typically a NEMA 14-50), while still ensuring you have enough amperage to run both of them simultaneously. Plug in either one or both of your portable chargers as necessary. A more popular solution is the 2-in-1 EVSE. Compare them here.

How can you charge multiple Teslas at once?

One of the ways is the Wall Connector, which is the fastest method to charge at home. Multiple Wall Connectors can be connected to share the power and charge your household for two or more Tesla cars. The Wall Connector allows you to charge your vehicle at home quickly. Read about other solutions in this article.

Are you allowed to have 2 Tesla Chargers in your home?

Both your Teslas can be charged simultaneously by either setting the current limit or charging one after another… You will need to monitor your Teslas to know when they are fully charged. Once you have done that, go to your garage to switch the charger to your second Tesla. Read about other solutions here.

Is it possible to charge 2 Tesla cars with a Tesla wall charger?

Power sharing is a feature that allows up to several Gen3 Wall Connectors to power multiple vehicles. If you are considering one device to charge 2 cars, take a look at our review.

What is a dual motor Tesla?

The Tesla Model S, manufactured from 2012–2016, had the option of a dual motor. These models are equipped with an optional charging module and can be retrofitted and would double the charging capacity to 22kW (instead 11 kW). An EV like this would get maximum power from the TWC of 80A.

What if you want to charge two EVs simultaneously?

There are several options. Install two chargers or buy a twin EV charger. A dual-socket charging point is available in our review.

Are two cars allowed to use the same charger?

Yes, if it is a special device. This can lead to vehicles being charged at different rates, and it is possible that one charge point will prevail over another. Two chargers mean half of the speed. It means that you can charge up to two vehicles simultaneously. All other ways are described here.

How many electric cars can you charge at your home?

It all depends on the architecture of the electrical grid and the installed breakers. It is possible to connect several chargers to the network, but you need to understand what kind of load the socket and breaker are designed for. This is what our review is about.

What is load balancing for EV charging?

The power distribution of electric car charging load balancing refers to a power distribution across multiple vehicles. A high-capacity EV charger station will, for example, distribute power to all charging vehicles. Multiple vehicles can be charged at the same EV charger station. These and other principles are explained in this article.

What’s the purpose of dynamic load managing?

Dynamic Load Management helps you to avoid costly power capacity upgrades when still installing the required number of chargers. It distributes available power dynamically and effectively. It makes sure that the grid does not get overloaded. Each EV is also charged efficiently.

How does load balancing work in EVs?

Load Balancing reduces overcapacity by evenly distributing available capacity across all charging ports in a given area. It is an essential smart charging feature for anyone who operates multiple charging ports in a limited area. Read about these and other features of the best chargers in the current review.

What does levelling mean for an electric car?

Levelling, also sometimes referred to as dynamic load balance allows you to safely balance energy consumption between your electric car charging station and other appliances on the site so that your car charges in the most efficient way.

What is a dynamic load balancing charger?

Dynamic load balancing is used for EV smart charging. It analyzes the available power based on energy consumption at the property, and then distributes that energy to all active charging points. Dynamic load balancing chargers can be evaluated here.

What is Power Sharing for EV charging?

Power Sharing, also sometimes referred to as load balancing, is a method of optimizing EV charging properties. First, electricity is evenly distributed to all EVs simultaneously. Second, charging occurs at a full rate whenever there’s enough capacity.

What is smart charging an EV?

Smart EV charging, also known as intelligent charging, refers to a system in which an electric vehicle and a charging device share data connections. The charging device also shares data with a charging operator.

Can two Chevy Bolts be charged simultaneously?

Yes. Rapid chargers considered here can charge multiple vehicles simultaneously. Although it will offer a slower rate than one vehicle.

What is the best way to charge two electric cars?

A Dual EV charger is recommended if you are certain you will need more than one home EV charging station to charge two cars. Reviewed here, dual EVSEs allow you to “daisy-chain” up to several chargers that will equally share the power of their electrical circuit.

Can ClipperCreek charge two cars simultaneously?

ClipperCreek, Grizzl-E, or another of the latest charging equipment allow for simultaneous charging of up to two vehicles. See a comparison of devices in this article.

Reference

  1. https://www.chevybolt.org/threads/multi-ev-household-charge-2-evs-at-once.14402/
  2. https://cleantechnica.com/2019/05/13/clippercreek-will-pay-you-to-trade-up-to-their-new-dual-charger-evse/
  3. https://par.nsf.gov/servlets/purl/10140450