How Many Amps Is 21.6 kW at 24V?

21.6 kW at 24V draws about 900 amps on an DC circuit at PF 0.85, typical for solar arrays, battery banks, and DC industrial equipment. Actual current varies with equipment power factor and duty cycle.

21.6 kW at 24V, DC (PF 0.85)

900 Amps

21.6 kilowatts at 24V on DC ≈ 900 amps

AC Single Phase (PF 0.85)1,058.82 A

Try: 22kW at 24V 20kW at 24V 25kW at 24V 18kW at 24V

Volts

Amps (DC)

900

Formulas

DC: kW to Amps

I_(A) = 1000 × P_(kW) ÷ V_(V)

1000 × 21.6 ÷ 24 = 21,600 ÷ 24 = 900 A

AC Single Phase (PF = 0.85)

I_(A) = 1000 × P_(kW) ÷ (PF × V_(V))

21,600 ÷ (0.85 × 24) = 21,600 ÷ 20.4 = 1,058.82 A

Equipment & Circuit Sizing

Energy Cost

21.6 kW costs $3.67/hour at $0.17/kWh (rates last reviewed April 2026). See breakdown.

Power Factor Reference (DC)

How the line current for 21.6 kW at 24V changes with load power factor, on the same DC circuit basis the rest of the page uses. DC has no power factor; PF 1.0 represents resistive AC loads.

Load Type	PF	21.6 kW at 24V (DC)
Resistive (heaters, incandescent)	1	900 A
Fluorescent lamps	0.95	900 A
LED lighting	0.9	900 A
Synchronous motors	0.9	900 A
Typical mixed loads	0.85	900 A
Induction motors (full load)	0.8	900 A
Computers (without PFC)	0.65	900 A
Induction motors (no load)	0.35	900 A

AC Conversion Comparison

On DC, 21.6kW at 24V draws 900A. AC single-phase at PF 0.85 pulls 1,058.82A because reactive current is added on top of the real power.

Circuit Type	Formula	Result
DC	21,600 ÷ 24	900 A
AC Single Phase (PF 0.85)	21,600 ÷ (0.85 × 24)	1,058.82 A

Other kW Values at 24V

kW	DC Amps	AC 1-Phase PF 0.85
3.5 kW	145.83 A	171.57 A
4 kW	166.67 A	196.08 A
5 kW	208.33 A	245.1 A
6 kW	250 A	294.12 A
7.5 kW	312.5 A	367.65 A
8 kW	333.33 A	392.16 A
10 kW	416.67 A	490.2 A
12 kW	500 A	588.24 A
15 kW	625 A	735.29 A
18 kW	750 A	882.35 A
20 kW	833.33 A	980.39 A
22 kW	916.67 A	1,078.43 A
25 kW	1,041.67 A	1,225.49 A
30 kW	1,250 A	1,470.59 A
35 kW	1,458.33 A	1,715.69 A

Same kW, Other Voltages

Each destination page leads with the interpretation most common for that voltage, so the amps shown below use the same basis as the page you'd land on: single-phase for residential voltages, three-phase for commercial/industrial panel voltages, DC for low-voltage.

electrical_services 21.6 kW at 208V = 70.54A (3-phase) electrical_services 21.6 kW at 220V = 115.51A (1-phase) electrical_services 21.6 kW at 230V = 110.49A (1-phase) electrical_services 21.6 kW at 240V = 105.88A (1-phase) electrical_services 21.6 kW at 400V = 36.68A (3-phase) electrical_services 21.6 kW at 460V = 31.89A (3-phase) electrical_services 21.6 kW at 480V = 30.57A (3-phase) electrical_services 21.6 kW at 575V = 25.52A (3-phase)

Related Calculations

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Frequently Asked Questions

How many amps is 21.6 kW at 24V?expand_more

21.6 kW at 24V draws about 900 amps on DC. Alternate cases at the same voltage: 1,058.82A on AC single-phase.

How many amps does a 21.6 kW EV charger draw at 24V?expand_more

At 24V, this is Level 1 territory (120V AC, single-phase, typically 12-16A). A 21.6 kW draw on a standard 120V household outlet is at or above the 1,440W NEC 210.19(A) continuous figure, which is why Level 1 EVSE ships at 1.4-1.9 kW and takes 20+ hours for a full charge. If you need 21.6 kW of charging, you want Level 2 on a 240V dedicated circuit, not 120V.

Is 21.6 kW single-phase or three-phase?expand_more

21.6 kW is typically three-phase in commercial and industrial settings.

Why do industrial systems use kW instead of watts?expand_more

Industrial equipment operates at higher power levels. 21.6 kW is easier to express than 21,600W. The math is identical, just scaled by 1000.

What is the formula for kW to amps?expand_more

DC: Amps = (kW × 1000) ÷ Volts. AC single-phase: Amps = (kW × 1000) ÷ (Volts × PF). AC three-phase: Amps = (kW × 1000) ÷ (Volts_L-L × √3 × PF).

This calculator provides estimates for reference purposes only. Always consult a licensed electrician and verify compliance with the National Electrical Code (NEC) and local electrical codes before performing any electrical work.