How Many Amps Is 22 kW?
22 kW is 39.69 A at 400 V three-phase with a power factor of 0.8. At other common voltages — 120 V: 132.3 A, 240 V: 66.15 A. Use the calculator below for any voltage or circuit type.
Real example: a 22 kW three-phase EV charger
22 kW is the largest common AC EV charger and about a 30 HP motor. On a 400 V three-phase supply at unity PF it is 32 A per phase — the "22 kW / 32 A" wallbox. Going single-phase would need ~115 A, which is why 22 kW is always three-phase.
22 kW to Amps — Reference Chart
| Circuit | Voltage | PF | Amps |
|---|---|---|---|
| DC | 120 V | — | 183.3333 A |
| DC | 240 V | — | 91.6667 A |
| DC | 480 V | — | 45.8333 A |
| AC 1Ø | 120 V | 1.0 | 183.3333 A |
| AC 1Ø | 240 V | 1.0 | 91.6667 A |
| AC 1Ø | 240 V | 0.8 | 114.5833 A |
| AC 3Ø (L-L) | 208 V | 0.8 | 76.3324 A |
| AC 3Ø (L-L) | 400 V | 0.8 | 39.6928 A |
| AC 3Ø (L-L) | 480 V | 0.8 | 33.0774 A |
Wire & breaker: A 22 kW charger draws 32 A per phase on 400 V three-phase, so it needs a 32 A three-phase supply (often on a 40 A breaker to respect the 80% continuous rule). A qualified electrician must verify the incoming supply can take it. Background: watts vs amps.
In practice: 22 kW, the AC charging ceiling
Twenty-two kilowatts is the fastest practical AC charging rate — 32 A across three phases at 400 V — and anything quicker moves to DC. The catch is that most electric cars carry onboard chargers limited to 7.4 or 11 kW, so a 22 kW wallbox frequently delivers half its rated speed. Check the vehicle's onboard charger rating before paying for the larger unit and its heavier supply cable.
Frequently Asked Questions
How many amps is 22 kW at 240V single-phase?
22 kW at 240V DC or PF 1 = (22 × 1,000) ÷ 240 = 91.6667 amps. For AC single-phase with PF 0.8: 22,000 ÷ (240 × 0.8) = 114.5833 amps.
How many amps is 22 kW on a 400V three-phase supply?
22 kW on 400V three-phase at PF 0.8 = (22 × 1,000) ÷ (√3 × 400 × 0.8) = 39.6928 amps per phase. At unity PF: 31.7543 amps.
How many amps is a 22 kW EV charger?
On 400 V three-phase at unity PF: 22,000 ÷ (√3 × 400) = 31.7543 A per phase — the "32 A" three-phase wallbox. That is double the 11 kW / 16 A unit. See kW to amps for other supplies.