How Many Amps Is 22 kW?
22 kW = 22,000 W. At 240 V single-phase (PF 0.8): 114.5833 A. At 400 V three-phase (PF 0.8): 39.6928 A per phase. As DC at 240 V: 91.6667 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.
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.