How Many Amps Is 11 kW?
11 kW is 19.85 A at 400 V three-phase with a power factor of 0.8. At other common voltages — 120 V: 66.15 A, 240 V: 33.08 A. Use the calculator below for any voltage or circuit type.
Real example: an 11 kW three-phase EV charger
11 kW is the standard three-phase EV-charger and 15 HP motor size. As a near-unity-PF EV load on a 400 V three-phase supply it draws 16 A per phase — the "11 kW / 16 A" wallbox seen across Europe. At 208 V (US commercial) the same power needs about 38 A.
11 kW to Amps — Reference Chart
| Circuit | Voltage | PF | Amps |
|---|---|---|---|
| DC | 120 V | — | 91.6667 A |
| DC | 240 V | — | 45.8333 A |
| DC | 480 V | — | 22.9167 A |
| AC 1Ø | 120 V | 1.0 | 91.6667 A |
| AC 1Ø | 240 V | 1.0 | 45.8333 A |
| AC 1Ø | 240 V | 0.8 | 57.2917 A |
| AC 3Ø (L-L) | 208 V | 0.8 | 38.1662 A |
| AC 3Ø (L-L) | 400 V | 0.8 | 19.8464 A |
| AC 3Ø (L-L) | 480 V | 0.8 | 16.5387 A |
Wire & breaker: An 11 kW wallbox on 400 V three-phase pulls ~16 A per phase at unity PF, so it sits on a 16 A (or next-size-up 20 A) three-phase breaker. EV charging is continuous, so the charger itself limits to 80% of the circuit. Confirm with an electrician. Background: watts vs amps.
In practice: an 11 kW three-phase wallbox
Eleven kilowatts is the standard European three-phase home charging rate: 16 A per phase at 400 V. Many distribution network operators permit 11 kW on simple notification but demand formal approval above it, which is why so many wallboxes ship capped at exactly this figure. On a single-phase supply the same power would need 48 A, well beyond a typical domestic connection.
Frequently Asked Questions
How many amps is 11 kW at 240V single-phase?
11 kW at 240V DC or PF 1 = (11 × 1,000) ÷ 240 = 45.8333 amps. For AC single-phase with PF 0.8: 11,000 ÷ (240 × 0.8) = 57.2917 amps.
How many amps is 11 kW on a 400V three-phase supply?
11 kW on 400V three-phase at PF 0.8 = (11 × 1,000) ÷ (√3 × 400 × 0.8) = 19.8464 amps per phase. At unity PF: 15.8771 amps.
Why is an 11 kW EV charger 16 A?
Three-phase power is √3 × V × A. At 400 V: √3 × 400 × 16 ≈ 11,085 W, i.e. 11 kW. That is why the common European home charger is rated "11 kW / 16 A three-phase." A 22 kW unit simply doubles the current to 32 A.