J1772 Adapters
for my Ioniq 5

Mark D Larsen

January 27, 2024

Stellar Twins

For several months, while I was planning to replace my Tesla Model 3 with an Ioniq 5 Limited, I began to look into what kinds of accessories I would need to make that transition. One of the most obvious considerations was how I would be able to charge the Ioniq 5, since it comes with a port for both J1772 and CCS1 plugs. I once had an AeroEnvironment J1772 EVSE in our garage for my Nissan LEAF, but later replaced it with a faster, more powerful Tesla HPWC for the Model 3. Now, ironically, with the Ioniq 5, I would have to revert to a J1772 plug when charging at home.

Yes, I could replace the HPWC with a dedicated J1772 EVSE, but that seemed silly to me, and way too expensive. Instead, I could invest in a J3400-to-J1772 adapter to use with the HPWC, and thus retain its higher charge rate and faster speeds. There are several such adapters available, such as TeslaTap’s Min 80 Amp, and Lectron’s EV Adapter, but ultimately I decided on A27’s Stellar Plug.

I decided to order two of A27’s adapters for reasons that I will explain below, and they arrived after a week. They came in sturdy, padded carrying cases, as shown in the photo at the top of the page, complete with keys to lock them to the vehicle to protect from theft. I determined that I don’t really need those cases, as I intended to mount and keep the adapters on my J3400 plugs.

NOTE: You can click on the following photos to enlarge them, and the movies to play them.

Why would I need two adapters? I knew that the Ioniq 5 came with a "granny charger," shown here, but it was only capable of plugging into a 120V outlet and would thus be very slow. I opine that Hyundai really needs to improve that accessory in the future to handle both 120V and 240V charges —like most other EV automakers.

Fortunately, I already own a Universal Mobile Connector (UMC), as well an entire set of adapters, capable of both 120V and 240V charging. I therefore decided keep to the UMC and equip it with one of the A27 adapters to be able to charge on roadtrips from practically any outlet imaginable. In this photo I have fit the J1772 adapter onto the UMC’s J3400 plug.

I store the UMC with the A2Z plug attached, along with all the adapters, in the frunk of my Ioniq 5. Yes, it is admittedly much smaller than the frunk in the Model 3, but nonetheless accommodates all my mobile charging paraphernalia just fine.

As for the second J1772 adapter, I installed it on the HPWC's J3400 plug. It was a tighter fit than on the UMC's plug, but I managed to apply enough pressure to seat it firmly. Here it is, ready to use when charging in my garage.

In this short movie I plug it into the Ioniq 5’s J1772 port. After a few seconds, you will see that the car recognizes the connection and then plays an alert that the "charging started."

I then checked the display inside the vehicle, and could see that it was charging at the maximum 11.4kW rate that the HPWC can produce —just like in the Model 3. No complaints from me!

Of course, the Ioniq 5's charge port is on the opposite side of the Model 3, so I decided to henceforth pull forward into the garage, like I had done with our LEAF years ago, then unwind the HPWC cable, extend it toward the rear of the Ioniq 5, and plug it at that end. I have already ordered a J1772 holster to accomodate some of the cable and the plug, which I will mount on the wall nearer the charge port.