The short answer
The Ioniq 6 accepts 10.9 kW on AC, so a 48 A charger on a 60 A breaker is the right size. But this is also the most efficient car on this site — EPA rates the 2025 RWD at 26.0 kWh per 100 miles — which means a 40 A charger delivers more useful range per hour here than on almost anything else, and is a genuinely good choice if it saves you money on the circuit.
Efficiency is the under-discussed half of home charging. Two cars at the same charge rate gain range at completely different speeds, and the Ioniq 6 is the beneficiary of that arithmetic more than any other model we cover.
The constraint: what this car accepts
Everything else on this page follows from one number. The Hyundai Ioniq 6's onboard charger accepts a maximum of 10.9 kW, which is 48 amps at 240 volts. No wall charger can exceed it, and a charger rated above it delivers no extra speed.
| Specification | Value | Source |
|---|---|---|
| Maximum AC power accepted | 10.9 kW | Hyundai USA Ioniq 6 specifications |
| Maximum AC current at 240 V | 48 A | Hyundai USA Ioniq 6 specifications |
| Connector | J1772 | Hyundai USA Ioniq 6 specifications |
| EPA range (2025 Ioniq 6 RWD (18 inch wheels)) | 342 mi | US DOE / EPA fueleconomy.gov |
| EPA efficiency | 26 kWh / 100 mi (132 MPGe) | US DOE / EPA fueleconomy.gov |
| EPA published 240 V charge time | 7.5 hours | US DOE / EPA fueleconomy.gov |
The consequence: the circuit you actually need
Take the car's 48 A ceiling and work backwards. NEC 625.42 classifies EV charging as a continuous load, and NEC 625.41 requires overcurrent protection at not less than 125% of the maximum load — so a 48 A charger needs a 60 A two-pole breaker and 6 AWG copper at the 75 degC column of NEC Table 310.16.
| Item | This car | Why |
|---|---|---|
| Charger output | 48 A | Matches the car's 48 A ceiling exactly |
| Power delivered | 10.9 kW | The lower of the charger's output and the car's limit |
| Breaker | 60 A, two-pole | NEC 625.41 — 125% of a continuous load |
| Copper conductor (conduit, 75 degC) | 6 AWG | NEC Table 310.16 |
| A bigger charger would | deliver nothing extra — this is already the car's ceiling | The lower of the two numbers always wins |
Charge times, with the arithmetic shown
EPA rates the 2025 Ioniq 6 RWD (18 inch wheels) at 26 kWh per 100 miles. That single figure lets you calculate any charge time you like, and it is why we show the formula rather than asserting a number.
hours = (miles x 26 / 100) / (kW x 0.9)
At 10.9 kW, this car gains about 38 miles of range per hour
The 0.9 allows for AC-to-DC conversion losses in the onboard charger — roughly 10% of what your meter records never reaches the battery. EPA efficiency figure from the US DOE / EPA fueleconomy.gov service, 2025 Ioniq 6 RWD (18 inch wheels), queried 2026-10-05.
| Charger | Miles added per hour | Hours to add 100 miles |
|---|---|---|
| 16 A (3.8 kW) | 13 | 7h 36m |
| 24 A (5.8 kW) | 20 | 4h 59m |
| 32 A (7.7 kW) | 27 | 3h 45m |
| 40 A (9.6 kW) | 33 | 3h 01m |
| 48 A (11.5 kW) | 38 | 2h 39m |
For context, EPA's own published figure for a full charge at 240 V on this trim is 7.5 hours.
What to buy for a Hyundai Ioniq 6
Our picks for the Hyundai Ioniq 6
Both are 48 A units that reach this car's full 11.5 kW. The top pick is most households, and anyone with a tight panel; the alternative is there because a house whose panel headroom is uncertain.
Most households, and anyone with a tight panel
Emporia Pro Level 2 EV Charger
The best-balanced 48 A charger for a typical US house: full 11.5 kW hardwired, and the only unit at this price that ships with a whole-home energy monitor so its load management is reading your actual panel rather than guessing.
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A house whose panel headroom is uncertain
ChargePoint Home Flex (hardwired, 50 A)
The most adjustable charger on this page: output steps through 16, 24, 32, 40, 48 and 50 A in the app, so one unit fits almost any panel and can be turned up later if you upgrade the service.
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Connector and adapters
The Hyundai Ioniq 6 uses a J1772 port for AC charging, which is what the large majority of home chargers in the US have. No adapter is needed for a J1772 charger.
You need a NACS to J1772 adapter only if you intend to use a Tesla Wall Connector, a Tesla Destination charger or a Tesla Mobile Connector. Rated headroom matters on a part carrying 48 A for eight hours — see best NACS to J1772 adapters.
A J1772 car on a Tesla Wall Connector or Destination charger
A2Z EV Stellar Plug NACS to J1772 AC Adapter
80 A / 19.2 kW rated, which is genuine headroom over any home charger. The part to buy if a Tesla charger is in the picture.
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Why efficiency beats amperage here
Compare like for like. At 40 A — 9.6 kW — on three cars from EPA's own figures:
| Vehicle (EPA trim) | kWh / 100 mi | Miles per hour at 40 A | Hours for 200 miles |
|---|---|---|---|
| Hyundai Ioniq 6 RWD 18in (2025) | 26.0 | 33 | 6h 03m |
| Tesla Model Y Long Range AWD (2026) | 27.5 | 31 | 6h 22m |
| Rivian R1T Dual Large (2026) | 44.4 | 19 | 10h 16m |
An Ioniq 6 on a 40 A charger replaces range faster than a Rivian on a 48 A one. Which is the whole reason this page says a 40 A circuit is a perfectly good decision for this car, where on the Rivian page we say the opposite.
The 800-volt architecture is a DC story, not an AC one
The Ioniq 6 shares Hyundai's 800-volt platform with the Ioniq 5 and the Kia EV6, and the DC fast charging that platform enables is genuinely exceptional. None of that affects your garage.
AC charging goes through a separate onboard charger rated at 10.9 kW, and that is the figure your home circuit has to serve. A car that can take 200+ kW on a DC fast charger still takes 10.9 kW from your wall. This distinction trips people up constantly — see NACS vs J1772 vs CCS explained for why the two paths are physically different.
Trim and wheel size matter more than you expect
| Trim | kWh / 100 mi | EPA range | EPA 240 V time |
|---|---|---|---|
| Ioniq 6 RWD (18in) | 26.0 | 342 mi | 7.5 h |
| Ioniq 6 AWD (18in) | 28.0 | 316 mi | 7.5 h |
| Ioniq 6 RWD (20in) | 29.8 | 291 mi | 7.5 h |
| Ioniq 6 AWD (20in) | 32.5 | 270 mi | 7.5 h |
| Ioniq 6 Standard Range | 25.0 | 240 mi | 6.1 h |
Going from 18-inch to 20-inch wheels costs roughly 15% of this car's efficiency, which is a larger effect on your charging than choosing 40 A over 48 A. Worth knowing when you order the car, not just when you order the charger.
Connector
Current US Ioniq 6 models use J1772 for AC charging, so any mainstream home charger plugs straight in. Hyundai has moved the Ioniq 5 to a native NACS port from the 2025 model year, and the Ioniq 6 is following the same transition — so confirm your own car's port rather than assuming. Which plug does my EV use covers it by model.