The short answer
The Kia EV9 accepts 10.9 kW on AC, so a 48 A charger on a 60 A breaker with 6 AWG copper is the right size — and unlike on an efficient sedan, we would not compromise down to 40 A here unless your panel forces it. EPA's published 240 V charge time for the 2026 Long Range RWD is 10.7 hours, and at 38 kWh per 100 miles this is a large vehicle that uses a lot of energy.
The EV9 is the clearest example on this site of why the "do I need 48 amps?" question has no single answer. On a Hyundai Ioniq 6 we tell you 40 A is plenty. On the EV9 — bigger battery, worse efficiency, longer charge time — the extra 1.9 kW is doing real work.
The constraint: what this car accepts
Everything else on this page follows from one number. The Kia EV9'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 | Kia USA EV9 specifications |
| Maximum AC current at 240 V | 48 A | Kia USA EV9 specifications |
| Connector | J1772 | Kia USA EV9 specifications |
| EPA range (2026 EV9 Long Range RWD) | 305 mi | US DOE / EPA fueleconomy.gov |
| EPA efficiency | 38 kWh / 100 mi (89 MPGe) | US DOE / EPA fueleconomy.gov |
| EPA published 240 V charge time | 10.7 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 2026 EV9 Long Range RWD at 38 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 38 / 100) / (kW x 0.9)
At 10.9 kW, this car gains about 26 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, 2026 EV9 Long Range RWD, queried 2026-10-05.
| Charger | Miles added per hour | Hours to add 100 miles |
|---|---|---|
| 16 A (3.8 kW) | 9 | 11h 07m |
| 24 A (5.8 kW) | 14 | 7h 17m |
| 32 A (7.7 kW) | 18 | 5h 29m |
| 40 A (9.6 kW) | 23 | 4h 24m |
| 48 A (11.5 kW) | 26 | 3h 52m |
For context, EPA's own published figure for a full charge at 240 V on this trim is 10.7 hours.
What to buy for a Kia EV9
Our picks for the Kia EV9
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 48 a on a budget.
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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48 A on a budget
EVIQO Level 2 EV Charger (48 A, hardwired)
The cheapest way to get a genuine 11.5 kW hardwired install, with IP66/NEMA 4 weatherproofing and an internal switch for 16/32/40/48 A. The trade is a younger brand with a shorter support record.
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Connector and adapters
The Kia EV9 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 the overnight window is tighter than you think
A three-row SUV gets used like one: school runs, long weekends, loaded up. EPA's 10.7-hour figure for a full charge means an EV9 arriving home at 15% and needing to be full by 7am is genuinely close to the limit on a 40 A charger.
| Charger | Power | Miles per hour | Hours for 200 miles |
|---|---|---|---|
| 32 A | 7.7 kW | 18 | 11h 00m |
| 40 A | 9.6 kW | 23 | 8h 48m |
| 48 A | 10.9 kW (car-limited) | 26 | 7h 45m |
The 48 A row finishes an hour before the 40 A row and over three hours before the 32 A one. On a typical eight-hour overnight window, that is the difference between a full car and a car at 90%.
Trim and efficiency
| Trim | kWh / 100 mi | EPA range | EPA 240 V time |
|---|---|---|---|
| EV9 Standard Range RWD | 38.0 | 230 mi | 8.1 h |
| EV9 Long Range RWD | 38.0 | 305 mi | 10.7 h |
| EV9 Long Range AWD | 40.0 | 283 mi | 10.7 h |
| EV9 Long Range AWD GT-Line | 41.0 | 280 mi | 10.5 h |
| EV9 GT | 43.0 | 260 mi | 10.8 h |
Every Long Range trim sits above ten hours at 240 V. That is the number that makes this a 48 A car.
The 800-volt architecture, again, does not help at home
The EV9 shares the 800-volt platform with the EV6 and the Ioniq 5, and like them its remarkable DC fast charging is irrelevant to your garage. AC charging runs through a 10.9 kW onboard charger, which is the number your circuit serves. See the EV6 page for the full explanation of why the two paths are physically separate.
A charger that watches your panel is worth more on this car
An EV9 drawing 48 A for ten hours is a substantial, sustained addition to a household's load. If your service is anywhere near marginal, this is the vehicle where load management stops being a nice feature and starts being the thing that makes the install possible. Our load calculation guide covers how to find out.