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.

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

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,...Bosch Automotive Equipment Bosch EV800 EV Dual Charge Stati...ClipperCreek Level 2 Dual Home Charging Station (HCS-D50) N...
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.
BrandGrizzl-EBosch Automotive EquipmentClipperCreek
Amperage4012, 16, 24, 3240
Voltage240240240
Cable length, ft242325
Enclosure MaterialSchedule 40 Galvanized Steel
HardwiredNoYesNo
Level222
Phase11n/a
PlugJ1772J1772J1772
SocketNEMA 14-50NEMA 6-50
Wall/StandWallStandWall
Weight49.917021
Working temperature-22F to 122F-40°F to 122°F-22°F to 122°F
Warrantyn/a3 yearsn/a
Certificaten/aETL certified to UL standardsETL, cETL, ENERGY STAR

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.

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 16 Amps while charging at once, and 32 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?

New EVs now come standard with 240-volt portable cable. 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 charger Tesla?

The Tesla Model S, manufactured from 2012–2016, had the option of a dual charger. Dual chargers 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 two 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?

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?

Level-1 charging stations can be used with 120-volt plugs. They can only charge one car at a given time. The plug cannot be used for other appliances.

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.

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