Inverter Current Calculator
Enter the input voltage of the inverter system (typically 12V, 24V, or 48V DC). Click “Calculate” to find out the current the inverter will draw from the battery or DC power source.
A 300 Watt Inverter generally pulls about 29.4 Amps. A 500 Watt Inverter usually draws approximately 52 Amps. A 600 Watt Inverter commonly draws around 62.5 Amps. A 750 Watt Inverter typically pulls about 78.13 Amps. A 1000 Watt Inverter typically draws around 98 Amps. A 1500 Watt Inverter generally draws approximately 126 Amps.
If you're working with kilowatts (kW), convert it to watts before calculation: Inverter Current = 1000 ÷ 12 = 83.33 Amps So, the inverter draws 83.33 amps from a 12V battery. Inverter Current = 3000 ÷ 24 = 125 Amps So, a 3000W inverter on a 24V system pulls 125 amps from the battery. Inverter Current = 5000 ÷ 48 = 104.17 Amps
300 watts at 24V DC is equal to 12.5 amps. 300 watts at 48V is equal to 6.25 amps. 300 watts at 110V is equal to 2.727 amps. 300 watts at 115V is equal to 2.609 amps. 300 watts at 120V is equal to 2.5 amps (as we have seen in the quick example above). 300 watts at 208V is equal to 1.442 amps. 300 watts at 220V is equal to 1.364 amps.
For 12 volts, the amperage of the inverter will be 1000 watts / 12 volts = 83.33 amps with 100% efficiency. As you already know, an inverter hardly ever has a 100%, we will calculate its amps with 85% efficiency. Because usually, 1000 watt inverters have 85% efficiency.
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